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AUSCERT External Security Bulletin Redistribution
ESB-2008.0203 -- [Solaris]
Security Vulnerability in Solaris 10 Perl 5.8
11 August 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: Perl 5.8
Publisher: Sun Microsystems
Operating System: Solaris 10
Impact: Execute Arbitrary Code/Commands
Denial of Service
Increased Privileges
Access: Remote/Unauthenticated
CVE Names: CVE-2007-5116
Ref: ESB-2007.0866
Comment: Solaris 8 and Solaris 9 are not affected by this issue.
Revision History: August 11 2008: Updated Patches
February 25 2008: Initial Release
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Solution Type: Sun Alert
Solution 231524 : Security Vulnerability in Solaris 10 Perl 5.8
Bug ID: 6629836
Product
Solaris 10 Operating System, Perl 5.8
Date of Workaround Release: 11-Feb-2008
Date of Resolved Release: 08-Aug-2008
SA Document Body
Security Vulnerability in Solaris 10 Perl 5.8
1. Impact
An unprivileged local user may be able to cause a Perl application to
crash, or possibly execute arbitrary code with the privileges of the
Perl application due to a buffer overflow in the regular expression
engine.
The ability to crash a Perl application is a type of Denial of Service
(DoS). If the Perl application accepts input from remote users, the
impact can be extended to include remote unprivileged users.
This issue is referenced in the following document:
CVE-2007-5116 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5116
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 10 without patch 122239-03
x86 Platform
* Solaris 10 without patch 122240-03
Note: Solaris 8 and Solaris 9 are not affected by this issue.
This issue only affects Perl versions 5.8.0 and later. Solaris 10
ships with Perl 5.6.1 in "/usr/perl5/5.6.1/" and Perl 5.8.4 in
"/usr/perl5/5.8.4/". The patches for this issue only apply to Perl
5.8.4.
3. Symptoms
There are no reliable symptoms that would indicate the described issue
has been exploited to execute arbitrary commands with the privileges
of the affected Perl application on a host. The symptoms of the Denial
of Service would be the Perl application no longer running.
4. Workaround
To work around the described issue, check for and remove utf-8
characters from the user supplied input. However, exact steps would
differ for each perl use case.
Or, use perl 5.6.1 instead, available on Solaris 10. Sites can modify
the path to Perl to use Perl 5.6.1 rather than 5.8.4 in their scripts
by changing the path to the Perl interpreter from /bin/perl or
/usr/bin/perl or /usr/perl5/5.8.4/bin/perl to
/usr/perl5/5.6.1/bin/perl.
Additional information can be found at
http://docs.sun.com/app/docs/doc/820-1259/fhkna?a=view
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 10 with patch 122239-03 or later
x86 Platform
* Solaris 10 with patch 122240-03 or later
For more information on Security Sun Alerts, see Technical
Instruction ID 213557.
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 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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