[gentoo-announce] [ GLSA 200804-06 ] UnZip: User-assisted execution of arbitrary code

[news 28]

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Gentoo Linux Security Advisory GLSA 200804-06

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http://security.gentoo.org/

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Severity: Normal

Title: UnZip: User-assisted execution of arbitrary code

Date: April 06, 2008

Bugs: #213761

ID: 200804-06

 

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Synopsis

========

 

A double free vulnerability discovered in UnZip might lead to the

execution of arbitrary code.

 

Background

==========

 

Info-ZIP's UnZip is a tool to list and extract files inside PKZIP

compressed files.

 

Affected packages

=================

 

-------------------------------------------------------------------

Package / Vulnerable / Unaffected

-------------------------------------------------------------------

1 app-arch/unzip < 5.52-r2 >= 5.52-r2

 

Description

===========

 

Tavis Ormandy of the Google Security Team discovered that the NEEDBITS

macro in the inflate_dynamic() function in the file inflate.c can be

invoked using invalid buffers, which can lead to a double free.

 

Impact

======

 

Remote attackers could entice a user or automated system to open a

specially crafted ZIP file that might lead to the execution of

arbitrary code or a Denial of Service.

 

Workaround

==========

 

There is no known workaround at this time.

 

Resolution

==========

 

All UnZip users should upgrade to the latest version:

 

# emerge --sync

# emerge --ask --oneshot --verbose ">=app-arch/unzip-5.52-r2"

 

References

==========

 

[ 1 ] CVE-2008-0888

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0888

 

Availability

============

 

This GLSA and any updates to it are available for viewing at

the Gentoo Security Website:

 

http://security.gentoo.org/glsa/glsa-200804-06.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 ( -at -) gentoo.org or alternatively, you may file a bug at

http://bugs.gentoo.org.

 

License

=======

 

Copyright 2008 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/2.5