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AUSCERT External Security Bulletin Redistribution
ESB-2003.0743 -- Sun(sm) Alert Notification - Sun Alert ID: 57404
Security Vulnerability Issues With Solstice X.25 snmpx25d daemon
27 October 2003
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AusCERT Security Bulletin Summary
---------------------------------
Product: snmpx25d
Publisher: Sun Microsystems
Operating System: Solaris 9
Solaris 8
Solaris 7
Solaris 2.6
Solaris 2.5.1
Solaris 2.5
Solaris 2.4
Platform: SPARC
x86
Impact: Root Compromise
Denial of Service
Access Required: Remote
Ref: AL-2002.02
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DOCUMENT ID: 57404
SYNOPSIS: Security Vulnerability Issues With Solstice X.25 snmpx25d
daemon
DETAIL DESCRIPTION:
Sun(sm) Alert Notification
* Sun Alert ID: 57404
* Synopsis: Security Vulnerability Issues With Solstice X.25
snmpx25d daemon
* Category: Security
* Product: Solstice X.25
* BugIDs: 4563124, 4642557, 4630596
* Avoidance: Patch
* State: Resolved
* Date Released: 22-Oct-2003
* Date Closed: 22-Oct-2003
* Date Modified:
1. Impact
With Solstice X.25, unprivileged local or remote users may be able to
kill the snmpx25d daemon due to the mishandling of SNMP requests. This
would cause a denial of service for utilities or users attempting to
access this daemon.
Also, unprivileged local or remote users may be able to gain
unauthorized root access due to a buffer overflow in the snmpx25d
daemon.
This issue is described in the CERT Vulnerability VU#854306 at
[1]http://www.kb.cert.org/vuls/id/854306 which is referenced in
CA-2002-03 at [2]http://www.cert.org/advisories/CA-2002-03.html.
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* X.25 9.1 (for Solaris 2.4, 2.5, 2.5.1, 2.6, and 7) without patch
105084-17
* X.25 9.2 (for Solaris 7, 8, and 9) without patch 108669-06
x86 Platform
* X.25 9.1 (for Solaris 2.4, 2.5, 2.5.1, 2.6, and 7) without patch
105188-17
* X.25 9.2 (for Solaris 7, 8, and 9) without patch 108670-06
To determine if X25 is installed and which version, run the following
command:
% pkginfo -l SUNWx25a | grep VERSION
If the VERSION string is returned (along with the corresponding
version), the system has Solstice X.25 installed. If nothing is
returned, then X25 is not installed.
3. Symptoms
The snmpx25d daemon may exit resulting in the creaton of a file named
"core" in the root (/) directory (if X.25 is started at system boot),
or in the directory from which X.25 was manually started.
SOLUTION SUMMARY:
4. Relief/Workaround
Some relief to the buffer overflow is available by enabling
non-executable user stacks (although this does not provide 100 percent
protection against exploitation of this vulnerability, it makes the
likelihood of a successful exploit much smaller). This workaround is
only effective on sun4u, sun4m, and sun4d architectures (enter "uname
-m" to display a systems architecture).
Note: This workaround will not work on x86 platforms.
To enable non-executable program stacks, add the following lines to
the "/etc/system" file and reboot the system:
set noexec_user_stack = 1
set noexec_user_stack_log = 1
The above tunable parameters are described in the "Solaris Tunable
Parameters Reference Manual" at [3]http://docs.sun.com.
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* X.25 9.1 (for Solaris 2.4, 2.5, 2.5.1, 2.6, and 7) with patch
105084-17 or later
* X.25 9.2 (for Solaris 7, 8, and 9) with patch 108669-06 or later
x86 Platform
* X.25 9.1 (for Solaris 2.4, 2.5, 2.5.1, 2.6, and 7) with patch
105188-17 or later
* X.25 9.2 (for Solaris 7, 8, and 9) with patch 108670-06 or later
This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
such an agreement, the Sun.com Terms of Use. This Sun Alert
notification may only be used for the purposes contemplated by these
agreements.
Copyright 2000-2003 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved.
References
1. http://www.kb.cert.org/vuls/id/854306
2. http://www.cert.org/advisories/CA-2002-03.html
3. http://docs.sun.com/
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