(Gentoo Issues Fix) GNU Enscript EPSF and Filename Command Input Validation Errors May Let Remote Users Execute Arbitrary Code in Certain Cases
|
|
SecurityTracker Alert ID: 1013068 |
|
SecurityTracker URL: http://securitytracker.com/id/1013068
|
|
CVE Reference:
CAN-2004-1184, CAN-2004-1185, CAN-2004-1186
(Links to External Site)
|
Date: Feb 3 2005
|
Impact:
Denial of service via network, Execution of arbitrary code via local system, Execution of arbitrary code via network, User access via network
|
Fix Available: Yes Vendor Confirmed: Yes
|
Version(s): 1.6.4 and prior versions
|
Description:
Several vulnerabilities were reported in GNU Enscript. A local user may be able to execute arbitrary commands or cause denial of service conditions. In some cases, a remote user may also be able to trigger these flaws.
Debian reported that an input validation vulnerability in EPSF pipe support may allow arbitrary commands to be executed [CVE: CAN-2004-1184].
An input validation flaw in the processing of filenames allows arbitrary commands to be executed [CVE: CAN-2004-1185].
Several buffer overflows may cause the application to crash [CVE: CAN-2004-1186].
These flaws reside in 'src/util.c' and 'src/psgen.c'.
Debian notes that enscript is usually run locally, but may be executed remotely via other applications (such as viewcvs).
Erik Sjolund is credited with discovering these flaws.
|
Impact:
If the target application is called via a remotely accessible application, a remote user may be able to execute arbitrary code or cause denial of service conditions.
|
Solution:
Gentoo has released a fix and indicates that all enscript users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/enscript-1.6.3-r3"
|
Vendor URL: people.ssh.fi/mtr/genscript/ (Links to External Site)
|
Cause:
Boundary error, Input validation error
|
Underlying OS:
Linux (Gentoo)
|
|
Message History:
This archive entry is a follow-up to the message listed below.
|
Source Message Contents
|
Date: Wed, 02 Feb 2005 14:06:37 +0100
Subject: [gentoo-announce] [ GLSA 200502-03 ] enscript: Multiple vulnerabilities
|
This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enig5E69213DB4D9BCFA22B5BE4C
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200502-03
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal
Title: enscript: Multiple vulnerabilities
Date: February 02, 2005
Bugs: #77408
ID: 200502-03
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
enscript suffers from vulnerabilities and design flaws, potentially
resulting in the execution of arbitrary code.
Background
==========
enscript is a powerful ASCII to PostScript file converter.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-text/enscript < 1.6.3-r3 >= 1.6.3-r3
Description
===========
Erik Sjolund discovered several issues in enscript: it suffers from
several buffer overflows (CAN-2004-1186), quotes and shell escape
characters are insufficiently sanitized in filenames (CAN-2004-1185),
and it supported taking input from an arbitrary command pipe, with
unwanted side effects (CAN-2004-1184).
Impact
======
An attacker could design malicious files or input data which, once
feeded into enscript, would trigger the execution of arbitrary code
with the rights of the user running enscript.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All enscript users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/enscript-1.6.3-r3"
References
==========
[ 1 ] CAN-2004-1184
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1184
[ 2 ] CAN-2004-1185
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1185
[ 3 ] CAN-2004-1186
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1186
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200502-03.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2005 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
--------------enig5E69213DB4D9BCFA22B5BE4C
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.6 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
iD8DBQFCANBivcL1obalX08RApWGAJ9jhxuT/C5GVYh+WTOGmDyyu1yJdwCgphwx
Ci4LFsw/IhqY4x9Z405ICjM=
=G6E+
-----END PGP SIGNATURE-----
--------------enig5E69213DB4D9BCFA22B5BE4C--
|
|
