CERT/CC Vulnerability Note VU#325603

Overview

Some versions of the rsync program contain a remotely exploitable vulnerability. This vulnerability may allow an attacker to execute arbitrary code on the target system.

Description

rsync is an open source utility that provides fast incremental file transfer. It features the ability to operate as either a client or server when transferring data over a network.

An integer overflow error has been discovered in a portion of rsync's memory handling routines. An attacker sending an extremely large, specifically crafted file may be able to exploit this error to execute arbitrary code from the heap of the rsync process address space. This error results in a vulnerability primarily when the rsync program is used in server mode, accepting input from remote clients over the network.

Versions of the rsync software 2.5.6 and earlier contain this flaw. Note: We have received reports of this vulnerability being used to successfully compromise systems.

Impact

An attacker may be able to execute arbitrary code in the context of the user running the rsync server, often root.

Solution

Apply patches

rsync version 2.5.7 has been released and contains patches to address this vulnerability.

Users using packaged versions of the rsync software are encouraged to review the vendor information in the Systems Affected section of this document for more details. Users compiling the rsync software from the distribution source code can obtain the patched version from the rsync homepage.

Workarounds

Administrators, particularly those who are unable to apply the patches in a timely fashion, are encouraged to consider implementing the following workarounds:

Disable the rsync service on systems that do not require it to be running.
Filter access to the rsync service. The rsync service normally runs on port 873/tcp. Limiting access to this port from trusted clients may reduce exposure to this vulnerability.

Vendor Information

325603

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Apple Computer, Inc. Affected

Debian Linux Affected

Updated: December 08, 2003

Status

Affected

Vendor Statement

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

- -------------------------------------------------------------------------- Debian Security Advisory DSA 404-1 security@debian.org http://www.debian.org/security/ Martin Schulze December 4th, 2003 http://www.debian.org/security/faq - --------------------------------------------------------------------------

Package : rsync Vulnerability : heap overflow Problem-Type : remote Debian-specific: no CVE ID : CAN-2003-0962

The rsync team has received evidence that a vulnerability in all versions of rsync prior to 2.5.7, a fast remote file copy program, was recently used in combination with a Linux kernel vulnerability to compromise the security of a public rsync server.

While this heap overflow vulnerability could not be used by itself to obtain root access on an rsync server, it could be used in combination with the recently announced do_brk() vulnerability in the Linux kernel to produce a full remote compromise.

Please note that this vulnerability only affects the use of rsync as an "rsync server". To see if you are running a rsync server you should use the command "netstat -a -n" to see if you are listening on TCP port 873. If you are not listening on TCP port 873 then you are not running an rsync server.

For the stable distribution (woody) this problem has been fixed in version 2.5.5-0.2.

For the unstable distribution (sid) this problem has been fixed in version 2.5.6-1.1.

However, since the Debian infrastructure is not yet fully functional after the recent break-in, packages for the unstable distribution are not able to enter the archive for a while. Hence they were placed in my home directory on the security machine:

<http://klecker.debian.org/~joey/rsync/>

We recommend that you upgrade your rsync package immediately if you are providing remote sync services. If you are running testing and provide remote sync services please use the packages for woody.

Upgrade Instructions - --------------------

wget url will fetch the file for you dpkg -i file.deb will install the referenced file.

If you are using the apt-get package manager, use the line for sources.list as given below:

apt-get update will update the internal database apt-get upgrade will install corrected packages

You may use an automated update by adding the resources from the footer to the proper configuration.

Debian GNU/Linux 3.0 alias woody - --------------------------------

Source archives:

http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5-0.2.dsc Size/MD5 checksum: 545 466c30b8dac303dc23a4e33bb64710ca http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5-0.2.diff.gz Size/MD5 checksum: 91526 a81021e1b1b60ae99e3fc95262ca96d6 http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5.orig.tar.gz Size/MD5 checksum: 415156 39d76c62684750842d3884a77c2e5466

Alpha architecture:

http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5-0.2_alpha.deb Size/MD5 checksum: 227344 b885337ced8ec3c902b4ef43d560cff5

ARM architecture:

http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5-0.2_arm.deb Size/MD5 checksum: 206240 4e39539b438128912b4d0f4971134eb4

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5-0.2_i386.deb Size/MD5 checksum: 199034 50f61c7b8a009767093e36ba68790a7b

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5-0.2_ia64.deb Size/MD5 checksum: 255378 886348cd33646fc167da6b1a9cbdc165

HP Precision architecture:

http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5-0.2_hppa.deb Size/MD5 checksum: 213962 6057690f85e14d01072ab6a84ad52996

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5-0.2_m68k.deb Size/MD5 checksum: 189620 d3c784bb621d2c7a66a2bd3fa418fad8

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5-0.2_mips.deb Size/MD5 checksum: 216122 f22358818b785d4bdb43cc56e0140f0a

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5-0.2_mipsel.deb Size/MD5 checksum: 216420 1e40db535e7b1d8340d65f101b2bb60a

PowerPC architecture:

http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5-0.2_powerpc.deb Size/MD5 checksum: 205436 d4bc1decf806f2102f434875ab4aa66e

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/r/rsync/rsync_2.5.5-0.2_sparc.deb Size/MD5 checksum: 205234 510bca72eacacf257b170da8c66b2255

These files will probably be moved into the stable distribution on its next revision.

- --------------------------------------------------------------------------------- For apt-get: deb http://security.debian.org/ stable/updates main For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main Mailing list: debian-security-announce@lists.debian.org Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>

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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

FreeBSD, Inc. Affected

Gentoo Linux Affected

Guardian Digital Inc. Affected

Updated: December 08, 2003

Status

Affected

Vendor Statement

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

+------------------------------------------------------------------------+ | Guardian Digital Security Advisory December 04, 2003 | | http://www.guardiandigital.com ESA-20031204-032 | | | | Package: rsync | | Summary: heap overflow vulnerability | +------------------------------------------------------------------------+

EnGarde Secure Linux is an enterprise class Linux platform engineered to enable corporations to quickly and cost-effectively build a complete and secure Internet presence while preventing Internet threats.

OVERVIEW - -------- A heap overflow vulnerability has been discovered in all versions of rsync prior to 2.5.7. This vulnerability, exploitable when rsync is being run in "server mode", may allow the attacker to run arbitrary code on the compromised server.

Guardian Digital has backported these fixes to version 2.4.6.

The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2003-0962 to this issue.

Guardian Digital products affected by this issue include:

EnGarde Secure Community v1.0.1 EnGarde Secure Community v2 EnGarde Secure Professional v1.1 EnGarde Secure Professional v1.2 EnGarde Secure Professional v1.5

It is recommended that all users apply this update as soon as possible.

SOLUTION - -------- Guardian Digital Secure Network subscribers may automatically update affected systems by accessing their account from within the Guardian Digital WebTool.

To modify your GDSN account and contact preferences, please go to:

https://www.guardiandigital.com/account/

Below are MD5 sums for the updated EnGarde Secure Linux 1.0.1 packages:

SRPMS/rsync-2.4.6-1.0.7.src.rpm MD5 Sum: 0059b139dce38f237019ae64a5dfbd84

i386/rsync-2.4.6-1.0.7.i386.rpm MD5 Sum: 3d6cba56a9ccf244f7078cdfc1704b5d

i686/rsync-2.4.6-1.0.7.i686.rpm MD5 Sum: 68392cd5df92513f75107c037e7c6a29

REFERENCES - ---------- Guardian Digital's public key: http://ftp.engardelinux.org/pub/engarde/ENGARDE-GPG-KEY

rsync's Official Web Site: http://rsync.samba.org

Guardian Digital Advisories: http://infocenter.guardiandigital.com/advisories/

Security Contact: security@guardiandigital.com

- -------------------------------------------------------------------------- Author: Ryan W. Maple <ryan@guardiandigital.com> Copyright 2003, Guardian Digital, Inc.

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Copyright(c) 2003 Guardian Digital, Inc. GuardianDigital.com ------------------------------------------------------------------------

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Immunix Affected

Mandriva, Inc. Affected

Updated: December 08, 2003

Status

Affected

Vendor Statement

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

- -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - --------------------------------------------------------------------------

PACKAGE : rsync SUMMARY : Fix for remote vulnerability DATE : 2003-12-04 18:46:00 ID : CLA-2003:794 RELEVANT RELEASES : 8, 9

- -------------------------------------------------------------------------

DESCRIPTION "rsync"[1] is a program used mainly to mirror files between remote sites. rsync versions prior to 2.5.7 have a heap buffer overflow vulnerability[2] which can be exploited by remote attackers to execute arbitrary code. This vulnerability specially affects installations where rsync is used as a server/daemon, that is, where it was started with the --daemon command line argument. A new rsync version, 2.5.7, was released by the authors to address this vulnerability.

SOLUTION It is recommended that all rsync users upgrade their packages. IMPORTANT: after the update, the rsync server must be restarted manually if it was already running. REFERENCES 1. http://rsync.samba.org/ 2. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0962

UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/8/SRPMS/rsync-2.5.7-5U80_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/rsync-2.5.7-5U80_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/9/SRPMS/rsync-2.5.7-13508U90_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/rsync-2.5.7-13508U90_1cl.i386.rpm

ADDITIONAL INSTRUCTIONS The apt tool can be used to perform RPM packages upgrades:

- run: apt-get update - after that, execute: apt-get upgrade

Detailed instructions reagarding the use of apt and upgrade examples can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en

- ------------------------------------------------------------------------- All packages are signed with Conectiva's GPG key. The key and instructions on how to import it can be found at http://distro.conectiva.com.br/seguranca/chave/?idioma=en Instructions on how to check the signatures of the RPM packages can be found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en

- ------------------------------------------------------------------------- All our advisories and generic update instructions can be viewed at http://distro.conectiva.com.br/atualizacoes/?idioma=en

- ------------------------------------------------------------------------- Copyright (c) 2003 Conectiva Inc. http://www.conectiva.com

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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

OpenBSD Affected

OpenPKG Affected

SCO Affected

SGI Affected

Updated: January 21, 2004

Status

Affected

Vendor Statement

-----BEGIN PGP SIGNED MESSAGE-----

______________________________________________________________________________ SGI Security Advisory

Title : SGI Advanced Linux Environment security update #6 Number : 20031202-01-U Date : December 10, 2003 Reference : Red Hat Advisory RHSA-2003:399-06, CAN-2003-0962 Fixed in : Patch 10037 for SGI ProPack v2.3 ______________________________________________________________________________

SGI provides this information freely to the SGI user community for its consideration, interpretation, implementation and use. SGI recommends that this information be acted upon as soon as possible.

SGI provides the information in this Security Advisory on an "AS-IS" basis only, and disclaims all warranties with respect thereto, express, implied or otherwise, including, without limitation, any warranty of merchantability or fitness for a particular purpose. In no event shall SGI be liable for any loss of profits, loss of business, loss of data or for any indirect, special, exemplary, incidental or consequential damages of any kind arising from your use of, failure to use or improper use of any of the instructions or information in this Security Advisory. ______________________________________________________________________________

- -------------- - --- Update --- - --------------

SGI has released Patch 10037: SGI Advanced Linux Environment security update #6, which includes updated RPMs for SGI ProPack v2.3 for the Altix family of systems, in response to the following erratas released by Red Hat:

New rsync packages fix remote security vulnerability http://rhn.redhat.com/errata/RHSA-2003-399.html

Patch 10037 is available from http://support.sgi.com/ and ftp://patches.sgi.com/support/free/security/patches/ProPack/2.3/

The individual RPMs from Patch 10037 are available from: ftp://oss.sgi.com/projects/sgi_propack/download/2.3/updates/RPMS ftp://oss.sgi.com/projects/sgi_propack/download/2.3/updates/SRPMS

- ------------- - --- Links --- - -------------

SGI Security Advisories can be found at: http://www.sgi.com/support/security/ and ftp://patches.sgi.com/support/free/security/advisories/

Red Hat Errata: Security Alerts, Bugfixes, and Enhancements http://www.redhat.com/apps/support/errata/

SGI Advanced Linux Environment security updates can found on: ftp://oss.sgi.com/projects/sgi_propack/download/

SGI patches can be found at the following patch servers: http://support.sgi.com/

The primary SGI anonymous FTP site for security advisories and security patches is ftp://patches.sgi.com/support/free/security/

- ----------------------------------------- - --- SGI Security Information/Contacts --- - -----------------------------------------

If there are questions about this document, email can be sent to security-info@sgi.com.

------oOo------

SGI provides security information and patches for use by the entire SGI community. This information is freely available to any person needing the information and is available via anonymous FTP and the Web.

The primary SGI anonymous FTP site for security advisories and patches is patches.sgi.com. Security advisories and patches are located under the URL ftp://patches.sgi.com/support/free/security/

The SGI Security Headquarters Web page is accessible at the URL: http://www.sgi.com/support/security/

For issues with the patches on the FTP sites, email can be sent to security-info@sgi.com.

For assistance obtaining or working with security patches, please contact your SGI support provider.

------oOo------

SGI provides a free security mailing list service called wiretap and encourages interested parties to self-subscribe to receive (via email) all SGI Security Advisories when they are released. Subscribing to the mailing list can be done via the Web (http://www.sgi.com/support/security/wiretap.html) or by sending email to SGI as outlined below.

% mail wiretap-request@sgi.com subscribe wiretap < YourEmailAddress such as midwatch@sgi.com > end ^d

In the example above, <YourEmailAddress> is the email address that you wish the mailing list information sent to. The word end must be on a separate line to indicate the end of the body of the message. The control-d (^d) is used to indicate to the mail program that you are finished composing the mail message.

------oOo------

SGI provides a comprehensive customer World Wide Web site. This site is located at http://www.sgi.com/support/security/ .

------oOo------

If there are general security questions on SGI systems, email can be sent to security-info@sgi.com.

For reporting *NEW* SGI security issues, email can be sent to security-alert@sgi.com or contact your SGI support provider. A support contract is not required for submitting a security report.

______________________________________________________________________________ This information is provided freely to all interested parties and may be redistributed provided that it is not altered in any way, SGI is appropriately credited and the document retains and includes its valid PGP signature.

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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

SUSE Linux Affected

Updated: December 08, 2003

Status

Affected

Vendor Statement

-----BEGIN PGP SIGNED MESSAGE-----

______________________________________________________________________________

SUSE Security Announcement

Package: rsync Announcement-ID: SuSE-SA:2003:050 Date: Thursday, Dec 4th 2003 14:30 MET Affected products: 7.3, 8.0, 8.1, 8.2, 9.0 SuSE Linux Database Server, SuSE eMail Server III, 3.1 SuSE Linux Enterprise Server 7, 8 SuSE Linux Firewall on CD/Admin host SuSE Linux Connectivity Server SuSE Linux Office Server Vulnerability Type: local privilege escalation Severity (1-10): 4 SUSE default package: no Cross References: CAN-2003-0962

Content of this advisory: 1) security vulnerability resolved: heap overflow problem description, discussion, solution and upgrade information 2) pending vulnerabilities, solutions, workarounds: - discontinue of SuSE Linux 7.3 - KDE - mc - apache - screen - mod_gzip - unace 3) standard appendix (further information)

______________________________________________________________________________

1) problem description, brief discussion, solution, upgrade information

The rsync suite provides client and server tools to easily support an administrator keeping the files of different machines in sync. In most private networks the rsync client tool is used via SSH to fulfill his tasks. In an open environment rsync is run in server mode accepting connections from many untrusted hosts with, but mostly without, authentication. The rsync server drops its root privileges soon after it was started and per default creates a chroot environment. Due to insufficient integer/bounds checking in the server code a heap overflow can be triggered remotely to execute arbitrary code. This code does not get executed as root and access is limited to the chroot environment. The chroot environment maybe broken afterwards by abusing further holes in system software or holes in the chroot setup.

Your are not vulnerable as long as you do not use rsync in server mode or you use authentication to access the rsync server.

As a temporary workaround you can disable access to your rsync server for untrusted parties, enable authentication or switch back to rsync via SSH.

Please download the update package for your distribution and verify its integrity by the methods listed in section 3) of this announcement. Then, install the package using the command "rpm -Fhv file.rpm" to apply the update. Our maintenance customers are being notified individually. The packages are being offered to install from the maintenance web.

Intel i386 Platform:

SuSE-9.0: ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/rsync-2.5.6-193.i586.rpm e848708286572c8a793819e5a358274a patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/rsync-2.5.6-193.i586.patch.rpm d70f7726a2c8850a8c085bdbe9afbf27 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/rsync-2.5.6-193.src.rpm 45e14417a64704fcee1dfea390a5b3f6

SuSE-8.2: ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/rsync-2.5.6-193.i586.rpm 341d1da31000831d994e48d0714b576d patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/rsync-2.5.6-193.i586.patch.rpm d94f1a84fc07e92dfc87471f909314c9 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/rsync-2.5.6-193.src.rpm 16b19cc2331ff577f2d1f9e116e74625

SuSE-8.1: ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/rsync-2.5.5-258.i586.rpm 28799a5950666eb7f104e2831575fb3c patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/rsync-2.5.5-258.i586.patch.rpm 02557d2de1dc27ffd97845ebabb336b6 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/rsync-2.5.5-258.src.rpm 6a7cd73509acf3cca12d9a4f4b3aec98

SuSE-8.0: ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/rsync-2.4.6-499.i386.rpm cf9fde4bcf1f3af3e3c5ae6bf5ceba85 patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/rsync-2.4.6-499.i386.patch.rpm 0a61425e9bb345fe73e42926408257cb source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/rsync-2.4.6-499.src.rpm d5c29841ff1f387cb003c359eee868df

SuSE-7.3: ftp://ftp.suse.com/pub/suse/i386/update/7.3/n2/rsync-2.4.6-499.i386.rpm 67b2400ee15d739e75a1463db7d003ca source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/rsync-2.4.6-499.src.rpm ececccdf316a4d98c66315fc560eb9b1

Sparc Platform:

SuSE-7.3: ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n2/rsync-2.4.6-190.sparc.rpm bd408eb2cfe82206439c78a1fbaecf60 source rpm(s): ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/rsync-2.4.6-190.src.rpm e500422c7cf0dc39c6bb3cf2445d9998

SuSE-7.3: ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n2/rsync-2.4.6-309.ppc.rpm 7eebb018bce237a4f351f5e00761ead1 source rpm(s): ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/rsync-2.4.6-309.src.rpm 2dd16900d70cbf06454dcd52b822a0ae

______________________________________________________________________________

2) Pending vulnerabilities in SUSE Distributions and Workarounds:

- discontinue of SuSE Linux 7.3 Two years after the release, SUSE will discontinue providing updates and security fixes for the SuSE Linux 7.3 consumer product on the Intel i386 and the PPC Power PC architectures. Vulnerabilities found after December 15th 2003 will not be fixed any more for SuSE Linux 7.3. Directory structures referring to the SuSE Linux 7.3 release will be moved to the discontinued/ tree on our main ftp server ftp.suse.com the distribution directories first, followed by the update/ directory tree in January 2004. Please note that our SuSE Linux Enterprise Server family products have a much longer support period. These products are not concerned by this announcement.

- KDE New KDE packages are currently being tested. These packages fixes several vulnerabilities: + remote root compromise (CAN-2003-0690) + weak cookies (CAN-2003-0692) + SSL man-in-the-middle attack + information leak through HTML-referrer (CAN-2003-0459) + wrong file permissions of config files The packages will be release as soon as testing is finished.

- mc By using a special combination of links in archive-files it is possible to execute arbitrary commands while mc tries to open it in its VFS. The packages are currently tested and will be release as soon as possible.

- apache1/2 The widely used HTTP server apache has several security vulnerabilities: - locally exploitable buffer overflow in the regular expression code. The attacker must be able to modify .htaccess or httpd.conf. (affects: mod_alias and mod_rewrite) - under some circumstances mod_cgid will output its data to the wrong client (affects: apache2) Update packages are available on our FTP servers.

- freeradius Two vulnerabilities were found in the FreeRADIUS package. The remote denial-of-service attack bug was fixed and new packages will be released as soon as testing was successfully finished. The other bug is a remote buffer overflow in the module rlm_smb. We do not ship this module and will fix it for future releases.

- screen A buffer overflow in screen was reported. Since SuSE Linux 8.0 we do not ship screen with the s-bit anymore. An update package will be released for 7.3 as soon as possible.

- mod_gzip The apache module mod_gzip is vulnerable to remote code execution while running in debug-mode. We do not ship this module in debug-mode but future versions will include the fix. Additionally the mod_gzip code was audited to fix more possible security related bugs.

- unace The tool unace for handling the archive format ACE is vulnerable to a buffer overflow that can be triggered with long file-names as command line argument. This only affects unace version 2.5. Unfortunately this tool is provided closed source only from the author. Therefore we are unable to check for other bugs or look at the patch. Update packages are available from our FTP servers. ______________________________________________________________________________

3) standard appendix: authenticity verification, additional information

- Package authenticity verification:

SUSE update packages are available on many mirror ftp servers all over the world. While this service is being considered valuable and important to the free and open source software community, many users wish to be sure about the origin of the package and its content before installing the package. There are two verification methods that can be used independently from each other to prove the authenticity of a downloaded file or rpm package: 1) md5sums as provided in the (cryptographically signed) announcement. 2) using the internal gpg signatures of the rpm package.

1) execute the command md5sum <name-of-the-file.rpm> after you downloaded the file from a SUSE ftp server or its mirrors. Then, compare the resulting md5sum with the one that is listed in the announcement. Since the announcement containing the checksums is cryptographically signed (usually using the key security@suse.de), the checksums show proof of the authenticity of the package. We disrecommend to subscribe to security lists which cause the email message containing the announcement to be modified so that the signature does not match after transport through the mailing list software. Downsides: You must be able to verify the authenticity of the announcement in the first place. If RPM packages are being rebuilt and a new version of a package is published on the ftp server, all md5 sums for the files are useless.

2) rpm package signatures provide an easy way to verify the authenticity of an rpm package. Use the command rpm -v --checksig <file.rpm> to verify the signature of the package, where <file.rpm> is the filename of the rpm package that you have downloaded. Of course, package authenticity verification can only target an un-installed rpm package file. Prerequisites: a) gpg is installed b) The package is signed using a certain key. The public part of this key must be installed by the gpg program in the directory ~/.gnupg/ under the user's home directory who performs the signature verification (usually root). You can import the key that is used by SUSE in rpm packages for SUSE Linux by saving this announcement to a file ("announcement.txt") and running the command (do "su -" to be root): gpg --batch; gpg < announcement.txt | gpg --import SUSE Linux distributions version 7.1 and thereafter install the
key "build@suse.de" upon installation or upgrade, provided that the package gpg is installed. The file containing the public key is placed at the top-level directory of the first CD (pubring.gpg) and at ftp://ftp.suse.com/pub/suse/pubring.gpg-build.suse.de .

- SUSE runs two security mailing lists to which any interested party may subscribe:

suse-security@suse.com - general/linux/SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an email to <suse-security-subscribe@suse.com>.

suse-security-announce@suse.com - SUSE's announce-only mailing list. Only SUSE's security announcements are sent to this list. To subscribe, send an email to <suse-security-announce-subscribe@suse.com>.

For general information or the frequently asked questions (faq) send mail to: <suse-security-info@suse.com> or <suse-security-faq@suse.com> respectively.

===================================================================== SUSE's security contact is <security@suse.com> or <security@suse.de>. The <security@suse.de> public key is listed below. ===================================================================== ______________________________________________________________________________

The information in this advisory may be distributed or reproduced, provided that the advisory is not modified in any way. In particular, it is desired that the clear-text signature shows proof of the authenticity of the text. SUSE Linux AG makes no warranties of any kind whatsoever with respect to the information contained in this security advisory.

Type Bits/KeyID Date User ID pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team <security@suse.de> pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@suse.de>

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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Slackware Affected

Updated: December 08, 2003

Status

Affected

Vendor Statement

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

[slackware-security] rsync security update (SSA:2003-337-01)

Rsync is a file transfer client and server.

A security problem which may lead to unauthorized machine access or code execution has been fixed by upgrading to rsync-2.5.7. This problem only affects machines running rsync in daemon mode, and is easier to exploit if the non-default option "use chroot = no" is used in the /etc/rsyncd.conf config file.

Any sites running an rsync server should upgrade immediately.

For complete information, see the rsync home page:

http://rsync.samba.org

Here are the details from the Slackware 9.1 ChangeLog: +--------------------------+ Wed Dec 3 22:18:35 PST 2003 patches/packages/rsync-2.5.7-i486-1.tgz: Upgraded to rsync-2.5.7. From the rsync-2.5.7-NEWS file: SECURITY: * Fix buffer handling bugs. (Andrew Tridgell, Martin Pool, Paul Russell, Andrea Barisani) The vulnerability affects sites running rsync in daemon mode (rsync servers). These sites should be upgraded immediately. (* Security fix *) +--------------------------+

WHERE TO FIND THE NEW PACKAGE: +-----------------------------+

Updated package for Slackware 8.1: ftp://ftp.slackware.com/pub/slackware/slackware-8.1/patches/packages/rsync-2.5.7-i386-1.tgz

Updated package for Slackware 9.0: ftp://ftp.slackware.com/pub/slackware/slackware-9.0/patches/packages/rsync-2.5.7-i386-1.tgz

Updated package for Slackware 9.1: ftp://ftp.slackware.com/pub/slackware/slackware-9.1/patches/packages/rsync-2.5.7-i486-1.tgz

Updated package for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/n/rsync-2.5.7-i486-1.tgz

MD5 SIGNATURES: +-------------+

Slackware 8.1 package: 9adcdfaeca3022204bc1bef1d97802cf rsync-2.5.7-i386-1.tgz

Slackware 9.0 package: 12788c9af15174c683ada4c5e5746372 rsync-2.5.7-i386-1.tgz

Slackware 9.1 package: 38d40a65d526f92c41ff72afae74e546 rsync-2.5.7-i486-1.tgz

Slackware -current package: 3f68fa78c6d095da4269e27806596d48 rsync-2.5.7-i486-1.tgz

INSTALLATION INSTRUCTIONS: +------------------------+

If you're running rsync as a daemon, kill it:

# killall rsync

Then, upgrade the package:

# upgradepkg rsync-2.5.7-i486-1.tgz

Finally, restart the rsync daemon:

# rsync --daemon

+-----+

Slackware Linux Security Team http://slackware.com/gpg-key security@slackware.com

+------------------------------------------------------------------------+ | HOW TO REMOVE YOURSELF FROM THIS MAILING LIST: | +------------------------------------------------------------------------+ | Send an email to majordomo@slackware.com with this text in the body of | | the email message: | | | | unsubscribe slackware-security | | | | You will get a confirmation message back. Follow the instructions to | | complete the unsubscription. Do not reply to this message to | | unsubscribe! | +------------------------------------------------------------------------+

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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Trustix Secure Linux Affected

Updated: December 08, 2003

Status

Affected

Vendor Statement

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

- -------------------------------------------------------------------------- Trustix Secure Linux Security Advisory #2003-0048

Package name: rsync Summary: remote code execution Date: 2003-12-04 Affected versions: TSL 1.2, 1.5, 2.0

- -------------------------------------------------------------------------- Package description: Rsync uses a quick and reliable algorithm to very quickly bring remote and host files into sync. Rsync is fast because it just sends the differences in the files over the network (instead of sending the complete files). Rsync is often used as a very powerful mirroring process or just as a more capable replacement for the rcp command. A technical report which describes the rsync algorithm is included in this package.

Problem description: All versions of rsync prior to 2.5.7 contains a heap overflow that can be used to exceute arbitary code from remote. The Common Vulnerabilites and Exposures project (cve.mitre.org) has assigned the name CAN-2003-0962 to this issue.

Action: We recommend that all systems with this package installed be upgraded. Please note that if you do not need the functionality provided by this package, you may want to remove it from your system.

Location: All TSL updates are available from <URI:http://http.trustix.org/pub/trustix/updates/> <URI:ftp://ftp.trustix.org/pub/trustix/updates/>

About Trustix Secure Linux: Trustix Secure Linux is a small Linux distribution for servers. With focus on security and stability, the system is painlessly kept safe and up to date from day one using swup, the automated software updater.

Automatic updates: Users of the SWUP tool can enjoy having updates automatically installed using 'swup --upgrade'.

Public testing: These packages have been available for public testing for some time. If you want to contribute by testing the various packages in the testing tree, please feel free to share your findings on the tsl-discuss mailinglist. The testing tree is located at <URI:http://tsldev.trustix.org/cloud/>

You may also use swup for public testing of updates: site { class = 0 location = "http://tsldev.trustix.org/cloud/rdfs/latest.rdf" regexp = ".*" }

Questions? Check out our mailing lists: <URI:http://www.trustix.org/support/>

Verification: This advisory along with all TSL packages are signed with the TSL sign key. This key is available from: <URI:http://www.trustix.org/TSL-SIGN-KEY>

The advisory itself is available from the errata pages at <URI:http://www.trustix.org/errata/trustix-1.2/>, <URI:http://www.trustix.org/errata/trustix-1.5/> and <URI:http://www.trustix.org/errata/trustix-2.0/> or directly at <URI:http://www.trustix.org/errata/misc/2003/TSL-2003-0048-rsync.asc.txt>

MD5sums of the packages: - -------------------------------------------------------------------------- ff92f850103caec5566d3037005be1cc ./1.2/rpms/rsync-2.5.7-1tr.i586.rpm c96460c2df73f6f28e86676f0087eed7 ./1.2/srpms/rsync-2.5.7-1tr.src.rpm 24f991051c4d7dc7287770a999c91cfe ./1.5/rpms/rsync-2.5.7-1tr.i586.rpm c96460c2df73f6f28e86676f0087eed7 ./1.5/srpms/rsync-2.5.7-1tr.src.rpm d74d3a08933b4d22439bc08cf435cec9 ./2.0/rpms/rsync-2.5.7-1tr.i586.rpm 1547e73b44c4ee2df24f28b67a229666 ./2.0/rpms/rsync-server-2.5.7-1tr.i586.rpm 406331367957dd7f9ddfe56dc8177580 ./2.0/srpms/rsync-2.5.7-1tr.src.rpm - --------------------------------------------------------------------------

TSL Security Team

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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

TurboLinux Affected

View all 15 vendors View less vendors

CVSS Metrics

Group	Score	Vector
Base	0	AV:--/AC:--/Au:--/C:--/I:--/A:--
Temporal	0	E:ND/RL:ND/RC:ND
Environmental	0	CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

Acknowledgements

Timo Sirainen originally discovered and reported this vulnerability. The rsync development team credits Mike Warfield, Paul Russell, and Andrea Barisani with providing additional information that led to the development of a fix and advisory.

This document was written by Chad R Dougherty.

Other Information

CVE IDs:	CVE-2003-0962
Severity Metric:	29.40
Date Public:	2003-10-03
Date First Published:	2003-12-09
Date Last Updated:	2006-05-01 19:33 UTC
Document Revision:	29

Software Engineering Institute

CERT Coordination Center

Integer overflow vulnerability in rsync

Vulnerability Note VU#325603

Overview

Description

Impact

Solution

Vendor Information

Apple Computer, Inc. Affected

Debian Linux Affected

FreeBSD, Inc. Affected

Gentoo Linux Affected

Guardian Digital Inc. Affected

Immunix Affected

Mandriva, Inc. Affected

OpenBSD Affected

OpenPKG Affected

SCO Affected

SGI Affected

SUSE Linux Affected

Slackware Affected

Trustix Secure Linux Affected

TurboLinux Affected

CVSS Metrics

References

Acknowledgements

Other Information

Contact CERT/CC