Software Engineering Institute

dns_parse_reply() 
sm_resolve.c (
patched
)

--- sm_resolve.c.orig   Fri Jun 28 00:43:24 2002
+++ sm_resolve.c        Thu Jul 10 01:21:17 2003
@@ -233,6 +233,7 @@
\t\t\tdns_free_data(r);
\t\t\treturn NULL;
\t\t}
+\t\tmemset(*rr, 0, sizeof(**rr));
\t\t(*rr)->rr_domain = sm_strdup(host);
\t\tif ((*rr)->rr_domain == NULL)
\t\t{
sendmail 
free(
sendmail
 FEATURE(`enhdnsbl')
1) Upgrade your vulnerable system to 4-STABLE, 5.1-RELEASE, or to th
e
RELENG_5_1, RELENG_4_8, or RELENG_4_7 security branch dated after the
correction date (5.1-RELEASE-p2, 4.8-RELEASE-p4, or 4.7-RELEASE-p14,
respectively).
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=============================================================================
FreeBSD-SA-03:11.sendmail                                   Security Advisory
The FreeBSD Project

Topic:          sendmail DNS map problem

Category:       contrib
Module:         contrib_sendmail
Announced:      2003-08-26
Credits:        Oleg Bulyzhin <oleg@rinet.ru>
Affects:        4.6-RELEASE (up to -p16), 4.7-RELEASE (up to -p13),
4.8-RELEASE (up to -p3), 5.0-RELEASE (up to -p11)
4-STABLE prior to Mar 29 19:33:18 2003 UTC
Corrected:      2003-08-25 22:33:14 UTC (RELENG_5_0)
2003-08-25 22:35:23 UTC (RELENG_4_8)
2003-08-25 22:36:10 UTC (RELENG_4_7)
2003-08-25 22:38:53 UTC (RELENG_4_6)
FreeBSD only:   NO

For general information regarding FreeBSD Security Advisories,
including descriptions of the fields above, security branches, and the
following sections, please visit
<URL:
http://www.freebsd.org/security/
>.

I.   Background

FreeBSD includes sendmail(8), a general purpose internetwork mail
routing facility, as the default Mail Transfer Agent (MTA).

II.  Problem Description

Some versions of sendmail (8.12.0 through 8.12.8) contain a
programming error in the code that implements DNS maps.  A malformed
DNS reply packet may cause sendmail to call `free()' on an
uninitialized pointer.

NOTE: The default sendmail configuration in FreeBSD does not utilize
DNS maps.

III. Impact

Calling `free()' on an uninitialized pointer may result in a sendmail
child process crashing.  It may also be possible for an attacker to
somehow influence the value of the `uninitialized pointer' and cause
an arbitrary memory trunk to be freed.  This could further lead to
some other exploitable vulnerability, although no such cases are known
at this time.

IV.  Workaround

Do not use DNS maps.

V.   Solution

Do one of the following:

1) Upgrade your vulnerable system to 4-STABLE, 5.1-RELEASE, or to the
RELENG_5_1, RELENG_4_8, or RELENG_4_7 security branch dated after the
correction date (5.1-RELEASE-p11, 4.8-RELEASE-p4, or 4.7-RELEASE-p14,
respectively).

2) To patch your present system:

The following patch has been verified to apply to FreeBSD 5.0, 4.8,
4.7, and 4.6 systems.

a) Download the relevant patch from the location below, and verify the
detached PGP signature using your PGP utility.

ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:11/sendmail.patch


ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:11/sendmail.patch.asc


b) Execute the following commands as root:

# cd /usr/src
# patch < /path/to/patch
# cd /usr/src/lib/libsm
# make obj && make depend && make
# cd /usr/src/lib/libsmutil
# make obj && make depend && make
# cd /usr/src/usr.sbin/sendmail
# make obj && make depend && make && make install

c) Restart sendmail.  Execute the following command as root.

# /bin/sh /etc/rc.sendmail restart

VI.  Correction details

The following list contains the revision numbers of each file that was
corrected in FreeBSD.

Path                                                             Revision
Branch
- -------------------------------------------------------------------------
src/UPDATING
RELENG_5_0                                                   1.229.2.17
RELENG_4_8                                                1.73.2.80.2.6
RELENG_4_7                                               1.73.2.74.2.17
RELENG_4_6                                               1.73.2.68.2.45
src/sys/conf/newvers.sh
RELENG_5_0                                                    1.48.2.12
RELENG_4_8                                                1.44.2.29.2.5
RELENG_4_7                                               1.44.2.26.2.16
RELENG_4_6                                               1.44.2.23.2.34
src/contrib/sendmail/src/sm_resolve.c
RELENG_5_0                                                  1.1.1.4.2.1
RELENG_4_8                                              1.1.1.1.2.2.4.1
RELENG_4_7                                              1.1.1.1.2.2.2.1
RELENG_4_6                                              1.1.1.1.2.1.2.2
- -------------------------------------------------------------------------

VII. References

<URL:
http://www.sendmail.org/dnsmap1.html
>
<URL:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0688
>
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_______________________________________________
freebsd-security-notifications@freebsd.org mailing list

http://lists.freebsd.org/mailman/listinfo/freebsd-security-notifications

To unsubscribe, send any mail to "freebsd-security-notifications-unsubscribe@freebsd.org"
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

________________________________________________________________________

Mandrake Linux Security Update Advisory
________________________________________________________________________

Package name:           sendmail
Advisory ID:            MDKSA-2003:086
Date:                   August 26th, 2003

Affected versions:8.2, 9.0, Corporate Server 2.1
________________________________________________________________________

Problem Description:

A vulnerability was discovered in all 8.12.x versions of sendmail up to
and including 8.12.8.  Due to wrong initialization of RESOURCE_RECORD_T
structures, if sendmail receives a bad DNS reply it will call free() on
random addresses which usually causes sendmail to crash.
These updated packages are patched to fix the problem.
________________________________________________________________________

References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0688


http://www.sendmail.org/dnsmap1.html


http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/54367
________________________________________________________________________

Updated Packages:

Corporate Server 2.1:
06f312efc82a853bef8f244f0a7d62b6  corporate/2.1/RPMS/sendmail-8.12.6-3.4mdk.i586.rpm
6159dd74781b4e12ba2d9cb8c74cebc5  corporate/2.1/RPMS/sendmail-cf-8.12.6-3.4mdk.i586.rpm
0947b751f4934fe29f32eb02670640ee  corporate/2.1/RPMS/sendmail-devel-8.12.6-3.4mdk.i586.rpm
9b768e4a330cc0cd6cdebd1470953247  corporate/2.1/RPMS/sendmail-doc-8.12.6-3.4mdk.i586.rpm
8458487a8e2a69b3648896e342eb4c1a  corporate/2.1/SRPMS/sendmail-8.12.6-3.4mdk.src.rpm
Corporate Server 2.1/x86_64:
04d7ce56ad6b62339622ae6e030234ed  x86_64/corporate/2.1/RPMS/sendmail-8.12.6-3.4mdk.x86_64.rpm
4b64a8056a3499e1d36ac1de72bc8c7e  x86_64/corporate/2.1/RPMS/sendmail-cf-8.12.6-3.4mdk.x86_64.rpm
5e2ac30e590d3985c8de9ced5178d875  x86_64/corporate/2.1/RPMS/sendmail-devel-8.12.6-3.4mdk.x86_64.rpm
aabddfe03a3a0fb88082c0311b318738  x86_64/corporate/2.1/RPMS/sendmail-doc-8.12.6-3.4mdk.x86_64.rpm
8458487a8e2a69b3648896e342eb4c1a  x86_64/corporate/2.1/SRPMS/sendmail-8.12.6-3.4mdk.src.rpm
Mandrake Linux 8.2:
2039013cc832600fe00c8c16f04e167f  8.2/RPMS/sendmail-8.12.1-4.4mdk.i586.rpm
a628b53c10b173ad6b56ec818411e4a8  8.2/RPMS/sendmail-cf-8.12.1-4.4mdk.i586.rpm
41b1161434cab61b55bbda169949a980  8.2/RPMS/sendmail-devel-8.12.1-4.4mdk.i586.rpm
d7d9e039cb3265ad955ce1401d97ca98  8.2/RPMS/sendmail-doc-8.12.1-4.4mdk.i586.rpm
7340654c00efcb2d64149cc946e1ea3b  8.2/SRPMS/sendmail-8.12.1-4.4mdk.src.rpm
Mandrake Linux 8.2/PPC:
552617df801abbb743ea19f08efe9cd5  ppc/8.2/RPMS/sendmail-8.12.1-4.4mdk.ppc.rpm
634cf389d9b6d3782d52d6b4a9a06862  ppc/8.2/RPMS/sendmail-cf-8.12.1-4.4mdk.ppc.rpm
4e5fdd49f36c8263f9f8d4a5405beb27  ppc/8.2/RPMS/sendmail-devel-8.12.1-4.4mdk.ppc.rpm
320c1c788abf30b8fbafc6b6fff8ad6f  ppc/8.2/RPMS/sendmail-doc-8.12.1-4.4mdk.ppc.rpm
7340654c00efcb2d64149cc946e1ea3b  ppc/8.2/SRPMS/sendmail-8.12.1-4.4mdk.src.rpm
Mandrake Linux 9.0:
06f312efc82a853bef8f244f0a7d62b6  9.0/RPMS/sendmail-8.12.6-3.4mdk.i586.rpm
6159dd74781b4e12ba2d9cb8c74cebc5  9.0/RPMS/sendmail-cf-8.12.6-3.4mdk.i586.rpm
0947b751f4934fe29f32eb02670640ee  9.0/RPMS/sendmail-devel-8.12.6-3.4mdk.i586.rpm
9b768e4a330cc0cd6cdebd1470953247  9.0/RPMS/sendmail-doc-8.12.6-3.4mdk.i586.rpm
8458487a8e2a69b3648896e342eb4c1a  9.0/SRPMS/sendmail-8.12.6-3.4mdk.src.rpm
________________________________________________________________________

Bug IDs fixed (see 
https://qa.mandrakesoft.com
 for more information):
________________________________________________________________________

To upgrade automatically, use MandrakeUpdate or urpmi.  The verification
of md5 checksums and GPG signatures is performed automatically for you.

A list of FTP mirrors can be obtained from:

http://www.mandrakesecure.net/en/ftp.php


All packages are signed by MandrakeSoft for security.  You can obtain
the GPG public key of the Mandrake Linux Security Team by executing:

gpg --recv-keys --keyserver www.mandrakesecure.net 0x22458A98

Please be aware that sometimes it takes the mirrors a few hours to
update.

You can view other update advisories for Mandrake Linux at:

http://www.mandrakesecure.net/en/advisories/


MandrakeSoft has several security-related mailing list services that
anyone can subscribe to.  Information on these lists can be obtained by
visiting:

http://www.mandrakesecure.net/en/mlist.php


If you want to report vulnerabilities, please contact

security_linux-mandrake.com

Type Bits/KeyID     Date       User ID
pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team
<security linux-mandrake.com>
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Hash: SHA1

________________________________________________________________________

OpenPKG Security Advisory                            The OpenPKG Project

http://www.openpkg.org/security.html
              
http://www.openpkg.org

openpkg-security@openpkg.org                         openpkg@openpkg.org
OpenPKG-SA-2003.037                                          28-Aug-2003
________________________________________________________________________

Package:             sendmail
Vulnerability:       Denial of Service
OpenPKG Specific:    no

Affected Releases:   Affected Packages:        Corrected Packages:
OpenPKG CURRENT      none                      N.A.
OpenPKG 1.3          none                      N.A.
OpenPKG 1.2          <= sendmail-8.12.7-1.2.2  >= sendmail-8.12.7-1.2.3

Dependent Packages:  none

Description:
Oleg Bulyzhin reported to FreeBSD [1] a confirmed [2] Denial of
Service (DoS) vulnerability in all version of the Sendmail MTA [0]
earlier than 8.12.9. Due to a wrong initialization of an internal
structure, if Sendmail gets a bad DNS reply (with actual reply size
not equal the announced reply size), it later calls free() on a random
address. This usually cause Sendmail to crash.
Please check whether you are affected by running "<prefix>/bin/rpm
-q sendmail". If you have the "sendmail" package installed and its
version is affected (see above), we recommend that you immediately
upgrade it (see Solution). [3][4]
Solution:
Select the updated source RPM appropriate for your OpenPKG release
[5], fetch it from the OpenPKG FTP service [6] or a mirror location,
verify its integrity [7], build a corresponding binary RPM from it [3]
and update your OpenPKG installation by applying the binary RPM [4].
For the affected release OpenPKG 1.2, perform the following operations
to permanently fix the security problem (for other releases adjust
accordingly).
$ ftp ftp.openpkg.org
ftp> bin
ftp> cd release/1.2/UPD
ftp> get sendmail-8.12.7-1.2.3.src.rpm
ftp> bye
$ <prefix>/bin/rpm -v --checksig sendmail-8.12.7-1.2.3.src.rpm
$ <prefix>/bin/rpm --rebuild sendmail-8.12.7-1.2.3.src.rpm
$ su -
# <prefix>/bin/rpm -Fvh <prefix>/RPM/PKG/sendmail-8.12.7-1.2.3.*.rpm
________________________________________________________________________

References:
[0] 
http://www.sendmail.org/

[1] 
http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/54367

[2] 
http://www.sendmail.org/dnsmap1.html

[3] 
http://www.openpkg.org/tutorial.html#regular-source

[4] 
http://www.openpkg.org/tutorial.html#regular-binary

[5] 
ftp://ftp.openpkg.org/release/1.2/UPD/sendmail-8.12.7-1.2.3.src.rpm

[6] 
ftp://ftp.openpkg.org/release/1.2/UPD/

[7] 
http://www.openpkg.org/security.html#signature
________________________________________________________________________

For security reasons, this advisory was digitally signed with the
OpenPGP public key "OpenPKG <openpkg@openpkg.org>" (ID 63C4CB9F) of the
OpenPKG project which you can retrieve from 
http://pgp.openpkg.org
 and
hkp://pgp.openpkg.org. Follow the instructions on 
http://pgp.openpkg.org/

for details on how to verify the integrity of this advisory.
________________________________________________________________________

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-----BEGIN PGP SIGNED MESSAGE-----
______________________________________________________________________________
                           SGI Security Advisory
  Title    : Sendmail DNS Map Vulnerability
  Number   : 20030803-01-P
  Date     : August 25, 2003
  Reference: CVE CAN-2003-0688
  Reference: SGI BUG 898396
  Fixed in : IRIX 6.5.22 or patch 5287
______________________________________________________________________________
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.
______________________________________________________________________________
- -----------------------
- --- Issue Specifics ---
- -----------------------
It's been reported by sendmail.org that there is a potential problem in the
sendmail 8.12 series with respect to DNS maps in sendmail 8.12.8 and earlier
sendmail 8.12.x versions: http://www.sendmail.org/dnsmap1.html
SGI ships sendmail 8.12.5 with IRIX 6.5.19 and later. The bug did not exist
in versions before 8.12 as the DNS map type is new to 8.12.x versions.
This bug could potentially be exploited to cause a Denial of Service.
There may be a possibility of using it to gain remote root access.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2003-0688 to this issue:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0688
SGI has investigated the issue and recommends the following steps for
neutralizing the exposure.  It is HIGHLY RECOMMENDED that these measures be
implemented on ALL vulnerable SGI systems.
These issues have been corrected in patches and in future releases of IRIX.
- --------------
- --- Impact ---
- --------------
The sendmail binary is installed by default on IRIX 6.5 systems as part of
eoe.sw.base.
To determine the version of IRIX you are running, execute the following
command:
  # /bin/uname -R
That will return a result similar to the following:
  # 6.5 6.5.19f
The first number ("6.5") is the release name, the second ("6.5.16f" in this
case) is the extended release name.  The extended release name is the
"version" we refer to throughout this document.
- ----------------------------
- --- Temporary Workaround ---
- ----------------------------
There is no effective workaround available for these problems if you use dns
maps with sendmail.  SGI recommends either upgrading to IRIX 6.5.22 (when
available), or installing the appropriate patch from the listing below.
- ----------------
- --- Solution ---
- ----------------
SGI has provided a series of patches for these vulnerabilities. Our
recommendation is to upgrade to IRIX 6.5.22 (when available), or install the
appropriate patch.
   OS Version     Vulnerable?     Patch #      Other Actions
   ----------     -----------     -------      -------------
   IRIX 3.x        unknown                     Note 1
   IRIX 4.x        unknown                     Note 1
   IRIX 5.x        unknown                     Note 1
   IRIX 6.0.x      unknown                     Note 1
   IRIX 6.1        unknown                     Note 1
   IRIX 6.2        unknown                     Note 1
   IRIX 6.3        unknown                     Note 1
   IRIX 6.4        unknown                     Note 1
   IRIX 6.5           no
   IRIX 6.5.1         no
   IRIX 6.5.2         no
   IRIX 6.5.3         no
   IRIX 6.5.4         no
   IRIX 6.5.5         no
   IRIX 6.5.6         no
   IRIX 6.5.7         no
   IRIX 6.5.8         no
   IRIX 6.5.9         no
   IRIX 6.5.10        no
   IRIX 6.5.11        no
   IRIX 6.5.12        no
   IRIX 6.5.13        no
   IRIX 6.5.14        no
   IRIX 6.5.15        no
   IRIX 6.5.16        no
   IRIX 6.5.17        no
   IRIX 6.5.18        no
   IRIX 6.5.19       yes            5287       Notes 2 & 3
   IRIX 6.5.20       yes            5287       Notes 2 & 3
   IRIX 6.5.21       yes            5287       Notes 2 & 3
   IRIX 6.5.22        no
   NOTES
     1) This version of the IRIX operating has been retired. Upgrade to an
        actively supported IRIX operating system.  See
        http://support.sgi.com for more information.
     2) If you have not received an IRIX 6.5.X CD for IRIX 6.5, contact your
        SGI Support Provider or URL: http://support.sgi.com
     3) Upgrade to IRIX 6.5.22 (when available) or install the patch.
              ##### Patch File Checksums ####
Filename:                 README.patch.5287
Algorithm #1 (sum -r):    03461 10 README.patch.5287
Algorithm #2 (sum):       38994 10 README.patch.5287
MD5 checksum:             727E74B176D101AA4DE1E5F816E86AF2
Filename:                 patchSG0005287
Algorithm #1 (sum -r):    39412 4 patchSG0005287
Algorithm #2 (sum):       5197 4 patchSG0005287
MD5 checksum:             6A69EEF8FC02D549D110A64F8DEDA98C
Filename:                 patchSG0005287.eoe_src
Algorithm #1 (sum -r):    18481 378 patchSG0005287.eoe_src
Algorithm #2 (sum):       2432 378 patchSG0005287.eoe_src
MD5 checksum:             EBDE27E3AF773E0EA6D2884A88501B71
Filename:                 patchSG0005287.eoe_sw
Algorithm #1 (sum -r):    34932 1104 patchSG0005287.eoe_sw
Algorithm #2 (sum):       48296 1104 patchSG0005287.eoe_sw
MD5 checksum:             0DE3B5C3BE9FE1DE0E0F022BB2FCDF14
Filename:                 patchSG0005287.idb
Algorithm #1 (sum -r):    56703 4 patchSG0005287.idb
Algorithm #2 (sum):       23907 4 patchSG0005287.idb
MD5 checksum:             6A25934457046F7EDFD84A9CE39C9623
- ------------------------
- --- Acknowledgments ----
- ------------------------
SGI wishes to thank sendmail.org and the users of the Internet Community at
large for their assistance in this matter.
- -------------
- --- Links ---
- -------------
SGI Security Advisories can be found at:
http://www.sgi.com/support/security/ and
ftp://patches.sgi.com/support/free/security/advisories/
SGI Security Patches can be found at:
http://www.sgi.com/support/security/ and
ftp://patches.sgi.com/support/free/security/patches/
SGI patches for IRIX can be found at the following patch servers:
http://support.sgi.com/ and ftp://patches.sgi.com/
SGI freeware updates for IRIX can be found at:
http://freeware.sgi.com/
SGI patches and RPMs for Linux can be found at:
http://support.sgi.com
SGI patches for Windows NT or 2000 can be found at:
http://support.sgi.com/
IRIX 5.2-6.4 Recommended/Required Patch Sets can be found at:
http://support.sgi.com/ and ftp://patches.sgi.com/support/patchset/
IRIX 6.5 Maintenance Release Streams can be found at:
http://support.sgi.com/
IRIX 6.5 Software Update CDs can be obtained from:
http://support.sgi.com/
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/
For security and patch management reasons, ftp.sgi.com (mirrors
patches.sgi.com security FTP repository) lags behind and does not do a
real-time update.
- -----------------------------------------
- --- 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 aaanalyst@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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______________________________________________________________________________

SuSE Security Announcement

Package:                sendmail
Announcement-ID:        SuSE-SA:2003:035
Date:                   Tuesday, Aug 26th 2003 19:00 MEST
Affected products:      8.0, 8.1, 8.2
SuSE Linux Enterprise Server 8
remote denial-of-service
Severity (1-10):        5
SuSE default package:   no
Cross References:       CAN-2003-0688
Content of this advisory:
1) security vulnerability resolved: calling free() with arbitrary
argument
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds:
- traceroute(-nanog)
- gdm2
- pam_smb
- exim
3) standard appendix (further information)

______________________________________________________________________________

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

The well known and widely used MTA sendmail is vulnerable to a
remote denial-of-service attack in version 8.12.8 and earlier (but not
before 8.12). The bug exists in the DNS map code. This feature is
enabled by specifying FEATURE(`enhdnsbl').
When sendmail receives an invalid DNS response it tries to call free(3)
on random data which results in a process crash.
After your system was updated you have to restart your sendmail daemon
to make the update effective.
There is no known workaround for this vulnerability other than using a
different MTA.
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-8.2:

ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/sendmail-8.12.7-73.i586.rpm
eaf90e49886f496b2779107f1d9a831a
patch rpm(s):

ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/sendmail-8.12.7-73.i586.patch.rpm
c5999fe4026e05c4308249a7e3dbf8f4
source rpm(s):

ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/sendmail-8.12.7-73.src.rpm
2cda6c535a3be4e26c50373bd078b4c7

SuSE-8.1:

ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/sendmail-8.12.6-147.i586.rpm
03d2b6e1083f863dc19a28f44256b071
patch rpm(s):

ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/sendmail-8.12.6-147.i586.patch.rpm
ee6a3553396432bd3a208d355dacdd33
source rpm(s):

ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/sendmail-8.12.6-147.src.rpm
97417cee623251c6cc3009c13c5b1fbe

SuSE-8.0:

ftp://ftp.suse.com/pub/suse/i386/update/8.0/n1/sendmail-8.12.3-76.i386.rpm
c7cd791bdbcf0c5ed80cd9aab0ccc965
patch rpm(s):

ftp://ftp.suse.com/pub/suse/i386/update/8.0/n1/sendmail-8.12.3-76.i386.patch.rpm
a2d04f73894a09b9134f0f516c385d78
source rpm(s):

ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/sendmail-8.12.3-76.src.rpm
4c059b5714ba2dbe5860654622b65bfb

Intel i386 Platform:

SuSE-8.2:

ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/uucp-1.06.1-931.i586.rpm
1d5e50aea21f2ce88277fd9113dfb6da
patch rpm(s):

ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/uucp-1.06.1-931.i586.patch.rpm
402cff9f2e0e4b56b2409082d0adbc0d
source rpm(s):

ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/sendmail-8.12.7-73.src.rpm
2cda6c535a3be4e26c50373bd078b4c7

SuSE-8.1:

ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/uucp-1.06.1-931.i586.rpm
7de06e8f16800359e25b5d9dcc739af5
patch rpm(s):

ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/uucp-1.06.1-931.i586.patch.rpm
67c84d8cd4ff132ef0c1a91ed845b5d8
source rpm(s):

ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/sendmail-8.12.6-147.src.rpm
97417cee623251c6cc3009c13c5b1fbe

SuSE-8.0:

ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/uucp-1.06.1-931.i386.rpm
b95b64d0c474ee7b37a82e2fc04e72b7
patch rpm(s):

ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/uucp-1.06.1-931.i386.patch.rpm
e872341553634848bb19b0d89a1e3a37
source rpm(s):

ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/sendmail-8.12.3-76.src.rpm
4c059b5714ba2dbe5860654622b65bfb

______________________________________________________________________________

2)  Pending vulnerabilities in SuSE Distributions and Workarounds:

- traceroute(-nanog)
A integer overflow in traceroute can be abused by local attackers
to gain access to a raw IP socket.
New packages are available on out FTP servers.
- gdm2
Due to a bug in GDM it is possible for local users to read any text
file on a system by creating a symlink from ~/.xsession-errors.
Updated packages will be available on our FTP servers soon.
- pam_smb
A buffer overflow in the password handling function of pam_smb
allows remote root compromise.
Fixed packages will be available soon.
- exim
Two bugs where fixed in exim. One bug allows remote access as user
mail/mail and the other one allows local root access for 'Admin Users'.
Fixed packages are available on 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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Bye,
Thomas
-- 
Thomas Biege <thomas@suse.de>
SuSE Linux AG,Deutschherrnstr. 15-19,90429 Nuernberg
Function: Security Support & Auditing
"lynx -source 
http://www.suse.de/~thomas/contact/thomas.asc
 | pgp -fka"
Key fingerprint = 51 AD B9 C7 34 FC F2 54  01 4A 1C D4 66 64 09 83
--
finding beauty in the dissonance
- Maynard James Keenan


Group	Score	Vector
Base
Temporal
Environmental

CVE IDs:	CVE-2003-0688
Severity Metric:	15.75
Date Public:	2003-07-11
Date First Published:	2003-08-25
Date Last Updated:	2003-12-30 22:33 UTC
Document Revision:	15

Software Engineering Institute

CERT Coordination Center

Sendmail fails to appropriately initialize data structures for DNS maps

Vulnerability Note VU#993452

Overview

Description

Impact

Solution

Vendor Information

FreeBSD Affected

Status

Vendor Statement

Vendor Information

Addendum

MandrakeSoft Affected

Status

Vendor Statement

Vendor Information

Addendum

OpenBSD Affected

Status

Vendor Statement

Vendor Information

Addendum

OpenPKG Affected

Status

Vendor Statement

Vendor Information

Addendum

SGI Affected

Status

Vendor Statement

Vendor Information

Addendum

Sendmail Affected

Status

Vendor Statement

Vendor Information

Addendum

SuSE Inc. Affected

Status

Vendor Statement

Vendor Information

Addendum

Cray Inc. Unknown

Status

Vendor Statement

Vendor Information

Addendum

NetBSD Unknown

Status

Vendor Statement

Vendor Information

Addendum

CVSS Metrics

References

Acknowledgements

Other Information

Contact CERT/CC