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GLSA 200410-31: Archive::Zip: Virus detection evasion
Posted by Philipp Esselbach on: 10/29/2004 04:25 PM [ Print | 0 comment(s) ]
An Archive::Zip update is available for Gentoo Linux
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Gentoo Linux Security Advisory GLSA 200410-31
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http://security.gentoo.org/
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Severity: Low
Title: Archive::Zip: Virus detection evasion
Date: October 29, 2004
Bugs: #68616
ID: 200410-31
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Synopsis
=======
Email virus scanning software relying on Archive::Zip can be fooled into thinking a ZIP attachment is empty while it contains a virus, allowing detection evasion.
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Gentoo Linux Security Advisory GLSA 200410-31
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Low
Title: Archive::Zip: Virus detection evasion
Date: October 29, 2004
Bugs: #68616
ID: 200410-31
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
=======
Email virus scanning software relying on Archive::Zip can be fooled into thinking a ZIP attachment is empty while it contains a virus, allowing detection evasion.
Background
=========
Archive::Zip is a Perl module containing functions to handle ZIP archives.
Affected packages
================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-perl/Archive-Zip < 1.14 >= 1.14
Description
==========
Archive::Zip can be used by email scanning software (like amavisd-new) to uncompress attachments before virus scanning. By modifying the uncompressed size of archived files in the global header of the ZIP file, it is possible to fool Archive::Zip into thinking some files inside the archive have zero length.
Impact
=====
An attacker could send a carefully crafted ZIP archive containing a virus file and evade detection on some email virus-scanning software relying on Archive::Zip for decompression.
Workaround
=========
There is no known workaround at this time.
Resolution
=========
All Archive::Zip users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-perl/Archive-Zip-1.14"
References
=========
[ 1 ] iDEFENSE Security Advisory 10.18.04
http://www.idefense.com/application/poi/display?id=153
[ 2 ] rt.cpan.org bug #8077
http://rt.cpan.org/NoAuth/Bug.html?id=8077
Availability
===========
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200410-31.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 2004 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/1.0
=========
Archive::Zip is a Perl module containing functions to handle ZIP archives.
Affected packages
================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-perl/Archive-Zip < 1.14 >= 1.14
Description
==========
Archive::Zip can be used by email scanning software (like amavisd-new) to uncompress attachments before virus scanning. By modifying the uncompressed size of archived files in the global header of the ZIP file, it is possible to fool Archive::Zip into thinking some files inside the archive have zero length.
Impact
=====
An attacker could send a carefully crafted ZIP archive containing a virus file and evade detection on some email virus-scanning software relying on Archive::Zip for decompression.
Workaround
=========
There is no known workaround at this time.
Resolution
=========
All Archive::Zip users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-perl/Archive-Zip-1.14"
References
=========
[ 1 ] iDEFENSE Security Advisory 10.18.04
http://www.idefense.com/application/poi/display?id=153
[ 2 ] rt.cpan.org bug #8077
http://rt.cpan.org/NoAuth/Bug.html?id=8077
Availability
===========
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200410-31.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 2004 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/1.0
