GLSA 200502-32: UnAce: Buffer overflow
Posted on: 02/28/2005 10:58 AM

An UnAce security update is available for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200502-32
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http://security.gentoo.org/
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Severity: Normal
Title: UnAce: Buffer overflow and directory traversal
vulnerabilities
Date: February 28, 2005
Bugs: #81958
ID: 200502-32

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Synopsis
=======

UnAce is vulnerable to several buffer overflow and directory traversal attacks.

Background
=========

UnAce is an utility to extract, view and test the contents of an ACE archive.

Affected packages
================

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Package / Vulnerable / Unaffected
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1 app-arch/unace lt;= 1.2b *gt;= 1.2b-r1
app-arch/unace gt;= 2.0 *gt;= 1.2b-r1

Description
==========

Ulf Harnhammar discovered that UnAce suffers from buffer overflows when testing, unpacking or listing specially crafted ACE archives (CAN-2005-0160). He also found out that UnAce is vulnerable to directory traversal attacks, if an archive contains "./.." sequences or absolute filenames (CAN-2005-0161).

Impact
=====

An attacker could exploit the buffer overflows to execute malicious code or the directory traversals to overwrite arbitrary files.

Workaround
=========

There is no known workaround at this time.

Resolution
=========

All UnAce users should upgrade to the latest available 1.2 version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=app-arch/unace-1.2b-r1"

References
=========

[ 1 ] CAN-2005-0160
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0160
[ 2 ] CAN-2005-0161
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0161

Availability
===========

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200502-32.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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