Overview
A remotely exploitable buffer overflow exists in the Common Desktop Environment (CDE) Subprocess Control Service (dtspcd). An attacker who successfully exploits this vulnerability can execute arbitrary code as root.
Description
Internet Security Systems (ISS) X-Force has reported a remotely exploitable buffer overflow in the Common Desktop Environment (CDE) Subprocess Control Service (dtspcd). CDE is an integrated graphical user interface that runs on Unix and Linux operating systems. dtspcd is a network daemon that accepts requests from clients to execute commands and launch applications remotely. On systems running CDE, dtspcd is spawned by the Internet services daemon (typically inetd or xinetd) in response to a CDE client request. dtspcd is typically configured to run on port 6112/tcp with root privileges. dtspcd makes a function call to a shared library, libDTSvc.so.1, that contains a buffer overflow condition in the client connection routine. The buffer overflow can be exploited by a specially crafted CDE client request. Although the buffer overflow occurs in a shared library, the CERT/CC is not aware of any other CDE applications that use the vulnerable function. |
Impact
A successful attacker can execute arbitrary code remotely with root privileges. |
Solution
Apply Patch Apply the appropriate vendor supplied patch as described in the vendor section below. |
|
Vendor Information
Compaq Computer Corporation Affected
Notified: October 29, 2001 Updated: May 30, 2002
Status
Affected
Vendor Statement
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
UPDATE: (SSRTM541)Tru64 UNIX CDE, NFS and NIS related Potential
Security Vulnerabilities
Posted at http://ftp.support.compaq.com/patches/.new/security.shtml
NOTICE: There are no restrictions for distribution of this Bulletin
provided that it remains complete and intact.
RELEASE DATE: 17 April, 2002 (SSRT-541)
LAST UPDATED: 22 May, 2002 (SSRTM541) New Patches
SEVERITY: 1
SOURCE: Compaq Computer Corporation
Compaq Services
Software Security Response Team
REFERENCE: [security bulletin posted 17 April, 2002]
(SSRT-541) Tru64 UNIX CDE, NFS and NIS related Potential
Security Vulnerabilities
PROBLEM SUMMARY:
A number of potential security vulnerabilities in Tru64 UNIX V4.0F,
V4.0G, V5.0A, V5.1 and V5.1A, have recently been reported for CDE,
libc, and NFS where, under certain circumstances, system integrity
may be compromised by a malicious user.
o CDE (severity high)
o dtaction potential buffer overflow (SSRT0752U)
o ttsession potential buffer overflow (SSRT0753U)
o dtprintinfo potential buffer overflow (SSRT0757U, SSRT0788U)
o dtspcd potential buffer overflow. (SSRT0782U)
NOTE: cross-reference : (CVE CVE-2001-0803,CERT CA-2001-31,
CA-2002-01)
Compaq has not been able to reproduce the problem identified
in the CERT advisory for any Compaq OS. However with the
information available, we are including a code change for
dtspcd that will further reduce any potential buffer overflow
vulnerability.
o Buffer overflow attacks are commonly used to attempt to
subvert the function of a privileged program and
possibly execute commands at the elevated privileges if
the program file has the setuid privilege.
o Environment Variable LANG and LOCPATH (severity high)
o libc (SSRT0771U)
A libc environment variable corruption with LANG and
LOCPATH , may cause a potential buffer overflow
o NIS Network Information Service (severity moderate)
o ypbind may core during nmap portscan (SSRT0781U)
o Core: A file that is a copy of the contents of a
processes memory, that can be produced when that
process is aborted by certain kinds of internal error.
o NFS Network File System (severity moderate)
o NFS Potential packet flood denial of service (DoS) (SSRT1-26)
NOTE: Applies to V4.0g PK3 (BL17) & V5.0a PK3 (BL17) only
A remote user with malicious intent may cause a potential
denial of service (DoS) with portmap server.
o Network DoS attacks make computer systems inaccessible
by flooding a service, server or network with useless
traffic.
VERSIONS IMPACTED:
TRU64 UNIX Versions Impacted
V5.1A PK1 (BL1)
V5.1 PK4 (BL18)
V5.0A PK3 (BL17)
V4.0F PK7 (BL18)
V4.0G PK3 (BL17)
RESOLUTION:
The potential vulnerabilities noted below have been corrected and
newly released patches are now available for TRU64 UNIX.
Compaq strongly recommends that systems be updated to at least the
prerequisite version of TRU64 UNIX and PK release, then install the
previously released security patches identified in the security
bulletin
http://ftp.support.compaq.com/patches/.new/html/SSRT0742U-59U.shtml
prior to installing the following ERP (Early Release Patch).
UPDATE: 5/22/2002 Updated ERPs are now available for all supported
versions of Tru64 UNIX and will be available in the next aggregate
patch kits for each supported product version. Until these Tru64
UNIX fixes are available in mainstream patch kits, Compaq recommends
use of the following ERP kits:
NOTE: Please review the README file(s) for each patch prior to
installation.
The Early Release Patch kits use dupatch to install and will not
install over any installed Customer-Specific-Patches (CSPs) which
have file intersections with the ERPs. Contact your normal support
channel for assistance if the installation of the ERPs are blocked
by any of your installed CSPs.
Tru64 UNIX 5.1A
PREREQUISITE: Tru64 UNIX 5.1A with PK1 (BL1) installed
ERP Kit Name: T64V51AB1-C0011202-14166-ES-20020429.tar
Kit Location: http://ftp1.support.compaq.com/public/unix/v5.1a/
SUPERCEDES KIT: T64V51AB1-C0011201-13438-ES-20020228
Tru64 UNIX 5.1
PREREQUISITE: Tru64 UNIX 5.1 with PK4 (BL18) installed
ERP Kit Name: T64V51B18-C0102003-14238-ES-20020507.tar
Kit Location: http://ftp1.support.compaq.com/public/unix/v5.1/
SUPERCEDES KIT: T64V51B18-C0102001-13428-ES-20020228
Tru64 UNIX 5.0A
PREREQUISITE: Tru64 UNIX 5.0A with PK3 (BL17) installed
ERP Kit Name: T64V50AB17-C0018303-14330-ES-20020516.tar
Kit Location: http://ftp1.support.compaq.com/public/unix/v5.0a/
SUPERCEDES KIT: T64V50AB17-C0018301-13396-ES-20020226
Tru64 UNIX 4.0G
PREREQUISITE: Tru64 UNIX 4.0G with PK3 (BL17) installed
ERP Kit Name: T64V40GB17-C0010303-14314-ES-20020515.tar
Kit Location: http://ftp1.support.compaq.com/public/unix/v4.0g/
SUPERCEDES KIT: T64V40GB17-C0010301-13400-ES-20020226
Tru64 UNIX 4.0F
PREREQUISITE: Tru64 UNIX 4.0F with PK7 (BL18) installed
ERP Kit Name: DUV40FB18-C0067302-14158-ES-20020429.tar
Kit Location: http://ftp1.support.compaq.com/public/unix/v4.0f/
SUPERCEDES KIT: DUV40FB18-C0067301-13427-ES-20020228
Additional Notes:
The fixes contained in the Early Release Patch (ERP) kits listed
above will be available in the following mainstream patch kit(s):
Tru64 UNIX 5.1A PK2
Tru64 UNIX 5.1 PK5
Tru64 UNIX 5.0A PK4
Tru64 UNIX 4.0G PK5
Tru64 UNIX 4.0F PK8
MD5 and SHA1 checksums are available in the public patch notice for
the ERP kits. You may find information on how to verify MD5 and SHA1
checksums at http://www.support.compaq.com/patches/whats-new.shtml
After completing the update, Compaq strongly recommends that you
perform an immediate backup of your system disk so that any
subsequent restore operations begin with updated software. Otherwise,
you must reapply the update after any future restore operation. Any
future upgrades or patch release installations to your system will
require the re-application of the appropriate ERP (identified above).
SUPPORT: For further information, contact Compaq Global Services.
SUBSCRIBE:
To subscribe to automatically receive future Security
Advisories from the Compaq's Software Security Response Team via
electronic mail:
http://www.support.compaq.com/patches/mailing-list.shtml
REPORT:
To report a potential security vulnerability with any Compaq
supported product, send email mailto:security-ssrt@compaq.com
or mailto:sec-alert@compaq.com
Compaq appreciates your cooperation and patience. As always,
Compaq urges you to periodically review your system management
and security procedures. Compaq will continue to review and
enhance the security features of its products and work with
our customers to maintain and improve the security and integrity
of their systems.
"Compaq is broadly distributing this Security Bulletin in order to
bring to the attention of users of the affected Compaq products the
important security information contained in this Bulletin.
Compaq recommends that all users determine the applicability of
this information to their individual situations and take appropriate
action. Compaq does not warrant that this information is necessarily
accurate or complete for all user situations and, consequently,
Compaq will not be responsible for any damages resulting from
user's use or disregard of the information provided in this
Bulletin."
Copyright 2002 Compaq Information Technologies Group, L.P.
Compaq shall not be liable for technical or editorial errors
or omissions contained herein. The information in this document
is subject to change without notice. Compaq and the names of
Compaq products referenced herein are, either, trademarks
and/or service marks or registered trademarks and/or service
marks of Compaq Information Technologies Group, L.P. Other product
and company names mentioned herein may be trademarks and/or service
marks of their respective owners.
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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.
Hewlett-Packard Company Affected
Notified: October 29, 2001 Updated: March 08, 2002
Status
Affected
Vendor Statement
-----------------------------------------------------------------
HEWLETT-PACKARD COMPANY SECURITY BULLETIN: #0175
Originally issued: 12 Nov. 2001
Last revision: **Revision 3** 28 Feb. 2002
-----------------------------------------------------------------
The information in the following Security Bulletin should be acted
upon as soon as possible. Hewlett-Packard Company will not be
liable for any consequences to any customer resulting from customer's
failure to fully implement instructions in this Security Bulletin as
soon as possible.
------------------------------------------------------------------
PROBLEM: Buffer overflow in dtspcd
PLATFORM: HP9000 Series 700/800 running HP-UX releases 10.10,
10.20, 10.24, 11.00, 11.04, and 11.11.
DAMAGE: Possible unauthorized access, possible increased privileges.
** Rev. 3 **
SOLUTION: Install the appropriate patch for the HP-UX release:
10.10 PHSS_25785
10.20 PHSS_25786
10.24 PHSS_26029
11.00 PHSS_25787
--->>>> 11.04 PHSS_26030
11.11 PHSS_25788
MANUAL ACTIONS: None
AVAILABILITY: The patches for 10.10, 10.20, 10.24, 11.00, 11.04,
and 11.11 are available now.
CHANGE SUMMARY: Rev. 1 Patches available for 10.10, 10.20,
11.00, 11.11.
Rev. 2 Patches available for 10.24 and 11.04.
Rev. 3 Patch ID for 11.04 corrected.
------------------------------------------------------------------
A. Background
A buffer overflow has been reported in dtspcd. It may be
possible to exploit this overflow to gain unauthorized access.
B. Fixing the problem
Patches available for HP-UX releases 10.10, 10.20, 10.24,
11.00, 11.04, and 11.11.
C. Recommended solution
Install the appropriate patch for 10.10, 10.20, 10.24, 11.00,
11.04, and 11.11.
Note: Some of the patches have dependencies on other patches.
This is documented in the patch text.
All patches are now available. The ftp site which had
temporary fix files will be deleted.
D. To subscribe to automatically receive future NEW HP Security
Bulletins from the HP IT Resource Center via electronic
mail, do the following:
Use your browser to get to the HP IT Resource Center page
at:
http://itrc.hp.com
Use the 'Login' tab at the left side of the screen to login
using your ID and password. Use your existing login or the
"Register" button at the left to create a login, in order to
gain access to many areas of the ITRC. Remember to save the
User ID assigned to you, and your password.
In the left most frame select "Maintenance and Support".
Under the "Notifications" section (near the bottom of
the page), select "Support Information Digests".
To -subscribe- to future HP Security Bulletins or other
Technical Digests, click the check box (in the left column)
for the appropriate digest and then click the "Update
Subscriptions" button at the bottom of the page.
or
To -review- bulletins already released, select the link
(in the middle column) for the appropriate digest.
To -gain access- to the Security Patch Matrix, select
the link for "The Security Bulletins Archive". (near the
bottom of the page) Once in the archive the third link is
to the current Security Patch Matrix. Updated daily, this
matrix categorizes security patches by platform/OS release,
and by bulletin topic. Security Patch Check completely
automates the process of reviewing the patch matrix for
11.XX systems.
For information on the Security Patch Check tool, see:
http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
displayProductInfo.pl?productNumber=B6834AA"
The security patch matrix is also available via anonymous
ftp:
ftp.itrc.hp.com:~ftp/export/patches/hp-ux_patch_matrix
On the "Support Information Digest Main" page:
click on the "HP Security Bulletin Archive".
E. To report new security vulnerabilities, send email to
security-alert@hp.com
Please encrypt any exploit information using the
security-alert PGP key, available from your local key
server, or by sending a message with a -subject- (not body)
of 'get key' (no quotes) to security-alert@hp.com.
Permission is granted for copying and circulating this
Bulletin to Hewlett-Packard (HP) customers (or the Internet
community) for the purpose of alerting them to problems,
if and only if, the Bulletin is not edited or changed in
any way, is attributed to HP, and provided such reproduction
and/or distribution is performed for non-commercial purposes.
Any other use of this information is prohibited. HP is not
liable for any misuse of this information by any third party.
________________________________________________________________
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.
IBM Affected
Notified: October 29, 2001 Updated: August 11, 2003
Status
Affected
Vendor Statement
The emergency fix is no longer available since an official APAR is available. The APAR numbers are:
AIX 4.3: IY25436
AIX 5.1: IY25437
These APARs can be downloaded from:
http://techsupport.services.ibm.com/s2g/fixdb.html
and
https://techsupport.services.ibm.com/server/aix.fdc
respectively.
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.
SGI Affected
Notified: October 29, 2001 Updated: April 03, 2002
Status
Affected
Vendor Statement
SGI has released SGI Security Advisory 20011107-01-P and SGI Security Advisory 20020302-01-A.
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.
Sun Microsystems Inc. Affected
Notified: October 29, 2001 Updated: January 10, 2002
Status
Affected
Vendor Statement
-----BEGIN PGP SIGNED MESSAGE-----
________________________________________________________________________________
Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00214
Date: January 8, 2002
Cross-Ref: CERT Advisory CA-2001-31
Title: dtspcd
________________________________________________________________________________
The information contained in this Security Bulletin is provided "AS IS."
Sun makes no warranties of any kind whatsoever with respect to the information
contained in this Security Bulletin. ALL EXPRESS OR IMPLIED CONDITIONS,
REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT OR
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE
HEREBY DISCLAIMED AND EXCLUDED TO THE EXTENT ALLOWED BY APPLICABLE LAW.
IN NO EVENT WILL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY LOST REVENUE,
PROFIT OR DATA, OR FOR DIRECT, SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL
OR PUNITIVE DAMAGES HOWEVER CAUSED AND REGARDLESS OF ANY THEORY OF LIABILITY
ARISING OUT OF THE USE OF OR INABILITY TO USE THE INFORMATION CONTAINED IN
THIS SECURITY BULLETIN, EVEN IF SUN MICROSYSTEMS, INC. HAS BEEN ADVISED OF
THE POSSIBILITY OF SUCH DAMAGES.
If any of the above provisions are held to be in violation of applicable law,
void, or unenforceable in any jurisdiction, then such provisions are waived
to the extent necessary for this disclaimer to be otherwise enforceable in
such jurisdiction.
________________________________________________________________________________
1. Bulletins Topics
Sun announces the release of patches for Solaris(tm) 8, 7, 2.6,
and 2.5.1 (SunOS(tm) 5.8, 5.7, 5.6, and 5.5.1) which relate to a
buffer overflow in dtspcd.
Sun recommends that you install the patches listed in section 4
immediately on systems running the CDE Subprocess control service,
dtspcd, on SunOS 5.8, 5.7, 5.6, and 5.5.1.
2. Who is Affected
Vulnerable:SunOS 5.8, 5.8_x86, 5.7, 5.7_x86, 5.6,
5.6_x86, 5.5.1, and 5.5.1_x86
3. Understanding the Vulnerability
The CDE Subprocess Control Service (dtspcd) daemon accepts requests
from CDE clients to execute commands and launch applications on the
local system running the dtspcd daemon. The dtspcd daemon is spawned
by the inetd daemon (see inetd(1M)) in response to a CDE client
request. dtspcd is normally configured to run on port 6112/tcp with
root privileges.
A buffer overflow has been discovered in dtspcd which may be
exploited by a local or a remote attacker to gain root access on the
affected system. Any system that does not run the CDE Subprocess
Control service, dtspcd, is not vulnerable to this problem. This
issue was discovered by ISS X-Force who published an advisory at:
http://xforce.iss.net/alerts/advise101.php
CERT Advisory CA-2001-31 is available from:
http://www.cert.org/advisories/CA-2001-31.html
4. List of Patches
The following patches are available in relation to the above issue.
OS Version Patch ID
__________ _________
SunOS 5.8 108949-07
SunOS 5.8_x86 108950-07
SunOS 5.7 106934-04
SunOS 5.7_x86 106935-04
SunOS 5.6 105669-11
SunOS 5.6_x86 105670-10
SunOS 5.5.1 108363-02
SunOS 5.5.1_x86 108364-02
_______________________________________________________________________________
APPENDICES
A. Patches listed in this bulletin are available to all Sun customers at:
http://sunsolve.sun.com/securitypatch
B. Checksums for the patches listed in this bulletin are available at:
ftp://sunsolve.sun.com/pub/patches/CHECKSUMS
C. Sun security bulletins are available at:
http://sunsolve.sun.com/security
D. Sun Security Coordination Team's PGP key is available at:
http://sunsolve.sun.com/pgpkey.txt
E. To report or inquire about a security problem with Sun software, contact
one or more of the following:
- Your local Sun answer centers
- Your representative computer security response team, such as CERT
- Sun Security Coordination Team. Send email to:
security-alert@sun.com
F. To receive information or subscribe to our CWS (Customer Warning System)
mailing list, send email to:
security-alert@sun.com
with a subject line (not body) containing one of the following commands:
Command Information Returned/Action Taken
_______ _________________________________
help An explanation of how to get information
key Sun Security Coordination Team's PGP key
list A list of current security topics
query [topic] The email is treated as an inquiry and is forwarded to
the Security Coordination Team
report [topic] The email is treated as a security report and is
forwarded to the Security Coordination Team. Please
encrypt sensitive mail using Sun Security Coordination
Team's PGP key
send topic A short status summary or bulletin. For example, to
retrieve a Security Bulletin #00138, supply the
following in the subject line (not body):
send #138
subscribe Sender is added to our mailing list. To subscribe,
supply the following in the subject line (not body):
subscribe cws your-email-address
Note that your-email-address should be substituted
by your email address.
unsubscribe Sender is removed from the CWS mailing list.
________________________________________________________________________________
Copyright 2002 Sun Microsystems, Inc. All rights reserved. Sun,
Sun Microsystems, Solaris and SunOS are trademarks or registered trademarks
of Sun Microsystems, Inc. in the United States and other countries. This
Security Bulletin may be reproduced and distributed, provided that this
Security Bulletin is not modified in any way and is attributed to
Sun Microsystems, Inc. and provided that such reproduction and distribution
is performed for non-commercial purposes.
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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.
The Open Group Affected
Notified: October 29, 2001 Updated: November 12, 2001
Status
Affected
Vendor Statement
The Open Group is investigating this issue. Source licensees of The Open Group's CDE product can contact desktop@opengroup.org for advice regarding this issue.
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.
The SCO Group (SCO UnixWare) Affected
Notified: October 29, 2001 Updated: September 13, 2002
Status
Affected
Vendor Statement
Caldera has released Security Advisory CSSA-2001-SCO.30.
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.
Xi Graphics Affected
Notified: October 29, 2001 Updated: November 15, 2001
Status
Affected
Vendor Statement
Xi Graphics DeXtop 2.1 is vulnerable. Further information and a patch are available at the following locations:
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.
Cray Inc. Not Affected
Notified: October 29, 2001 Updated: October 31, 2001
Status
Not Affected
Vendor Statement
Cray, Inc. is not affected by VU#172583 since CDE is not included in UNICOS or UNICOS/mk. CrayTools does not contain CDE.
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.
Fujitsu Not Affected
Notified: October 29, 2001 Updated: October 31, 2001
Status
Not Affected
Vendor Statement
Fujitsu's UXP/V operating system is not vulnerable because it does not support any CDE components.
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.
Data General Unknown
Notified: October 29, 2001 Updated: October 31, 2001
Status
Unknown
Vendor Statement
We have not received a statement from the vendor.
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.
TriTeal Unknown
Updated: November 12, 2001
Status
Unknown
Vendor Statement
We have not received a statement from the vendor.
Vendor Information
The vendor has not provided us with any further information regarding this vulnerability.
Addendum
TriTeal went bankrupt in December 1999. It is possible that TriTeal Enterprise Desktop (TED) and CDE distributions based on TriTeal code are vulnerable.
If you have feedback, comments, or additional information about this vulnerability, please send us email.
CVSS Metrics
| Group | Score | Vector |
|---|---|---|
| Base | ||
| Temporal | ||
| Environmental |
References
Acknowledgements
This vulnerability was reported to the CERT Coordination Center by Internet Security Systems (ISS) X-Force.
This document was written by Art Manion.
Other Information
| CVE IDs: | CVE-2001-0803 |
| CERT Advisory: | CA-2001-31 |
| Severity Metric: | 16.30 |
| Date Public: | 2001-11-07 |
| Date First Published: | 2001-11-12 |
| Date Last Updated: | 2003-08-11 19:00 UTC |
| Document Revision: | 45 |