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AUSCERT External Security Bulletin Redistribution
ESB-2004.0071 -- Sun(sm) Alert Notification - Sun Alert ID: 57473
Security Vulnerabilities in "Safe.pm" and "CGI.pm" Perl Modules
27 January 2004
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AusCERT Security Bulletin Summary
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Product: Perl (Safe.pm and CGI.pm modules)
Publisher: Sun Microsystems
Operating System: Solaris 9
Solaris 8
Impact: Increased Privileges
Access Required: Remote
CVE Names: CAN-2002-1323 CAN-2003-0615
Original Bulletin:
http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%2F57473
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DOCUMENT ID: 57473
SYNOPSIS: Security Vulnerabilities in "Safe.pm" and "CGI.pm" Perl
Modules
DETAIL DESCRIPTION:
Sun(sm) Alert Notification
* Sun Alert ID: 57473
* Synopsis: Security Vulnerabilities in "Safe.pm" and "CGI.pm" Perl
Modules
* Category: Security
* Product: Solaris
* BugIDs: 4951799
* Avoidance: Workaround
* State: Committed
* Date Released: 23-Jan-2004
* Date Closed:
* Date Modified:
1. Impact
Security vulnerabilities in "Safe.pm" and "CGI.pm" Perl modules may
allow the following:
1. The "Safe.pm" Perl module contains a security vulnerability which
may allow a local or remote unprivileged user to bypass compartment
access controls if a Perl application utilizes the "Safe.pm" Perl
module.
2. The "CGI.pm" Perl module contains a cross site scripting security
vulnerability, see the following URLs for details about cross site
scripting and web script vulnerabilities:
* [1]http://www.cert.org/archive/pdf/cross_site_scripting.pdf
* [2]http://www.cert.org/tech_tips/malicious_code_FAQ.html
* [3]http://www.cert.org/advisories/CA-2000-02.html
Due to this "CGI.pm" cross site scripting vulnerability users may
unintentionally execute scripts in their browser written by a remote
unprivileged user if they follow untrusted links/URIs in web pages,
mail messages, or newsgroup postings. By following these untrusted
links/URIs, the remote attacker may be able to execute commands with
the privileges of the user who accessed the link/URI.
These issues are described here:
* CIAC Bulletin n-155 -
[4]http://www.ciac.org/ciac/bulletins/n-155.shtml
* CAN-2003-0615 -
[5]http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0615
* CAN-2002-1223 -
[6]http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1323
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 8
* Solaris 9
x86 Platform
* Solaris 8
* Solaris 9
Note: These issues can occur on systems with Perl module Safe.pm
version 2.0.7 or earlier or Perl module CGI.pm version 2.752 or
earlier. The CGI.pm Perl module and the Safe.pm are both included with
the Solaris Perl distribution.
To determine the version of the Safe.pm or the CGI.pm Perl modules,
the following commands can be run:
$ grep VERSION `nawk '/Safe.pm/ {print $1}' /var/sadm/install/contents`
$ grep VERSION `nawk '/CGI.pm/ {print $1}' /var/sadm/install/contents`
3. Symptoms
There are no predictable symptoms that would show that the described
issue has occurred.
SOLUTION SUMMARY:
4. Relief/Workaround
Customers should review the above CERT documents in addition to the
following URL for information on how to mitigate the risks of these
issues including details on hardening web servers, modifying web
browsers to disable scripting languages, and advice for developers.
See the practices numbered 18-22 at the following URL:
* [7]http://www.cert.org/security-improvement/
5. Resolution
A final resolution is pending completion.
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 2000-2004 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved.
References
1. http://www.cert.org/archive/pdf/cross_site_scripting.pdf
2. http://www.cert.org/tech_tips/malicious_code_FAQ.html
3. http://www.cert.org/advisories/CA-2000-02.html
4. http://www.ciac.org/ciac/bulletins/n-155.shtml
5. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0615
6. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1323
7. http://www.cert.org/security-improvement/
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