Date: Wed, 05 Oct 2005 13:35:37 +0200
From: Thierry Carrez <koon@gentoo.org.>
To: gentoo-announce@lists.gentoo.org
Subject: [ GLSA 200510-04 ] Texinfo: Insecure temporary file creation
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Gentoo Linux Security Advisory GLSA 200510-04
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http://security.gentoo.org/
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Severity: Normal
Title: Texinfo: Insecure temporary file creation
Date: October 05, 2005
Bugs: #106105
ID: 200510-04
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Synopsis
========
Texinfo is vulnerable to symlink attacks, potentially allowing a local
user to overwrite arbitrary files.
Background
==========
Texinfo is the official documentation system created by the GNU
project.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 sys-apps/texinfo < 4.8-r1 >= 4.8-r1
Description
===========
Frank Lichtenheld has discovered that the "sort_offline()" function in
texindex insecurely creates temporary files with predictable filenames.
Impact
======
A local attacker could create symbolic links in the temporary files
directory, pointing to a valid file somewhere on the filesystem. When
texindex is executed, this would result in the file being overwritten
with the rights of the user running the application.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Texinfo users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/texinfo-4.8-r1"
References
==========
[ 1 ] CAN-2005-3011
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-3011
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200510-04.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
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