Vulnerability Note VU#492545

Archive::Zip may not properly parse the file sizes of Zip archives

Overview

Archive::Zip does not properly parse Zip files and may incorrectly interpret malformed zip archives to contain zero length/size files. As a a result, anti-virus software using Archive::Zip may fail to detect malicious content within a Zip archive.

I. Description

The Archive::Zip module allows PERL programs to manipulate Zip archives. An attacker may be able to create a specially crafted Zip archive that could cause Archive::Zip to interpret files in the archive as having zero length. If anti-virus software is using Archive::Zip to scan Zip attachments, it may fail to detect the malicious content and allow the archive into the system.

II. Impact

A remote attacker may be able to craft a malicious Zip archive that will evade detection by anti-virus software using Archive::Zip. Once in the system, if the remote attacker can persuade the user to accesses the malicious archive, the attacker may be able to execute arbitrary code on that user's system, possibly with administrator privileges.

III. Solution

Upgrade Archive::Zip

This issue has been addressed in Archive::Zip version 1.4.

Systems Affected

Vendor	Status	Date Notified	Date Updated
CPAN	Vulnerable	12-Nov-2004

References

http://www.linuxsecurity.com/advisories/gentoo_advisory-5043.html
http://rt.cpan.org/NoAuth/Bug.html?id=8077
http://www.idefense.com/application/poi/display?id=153

Credit

This vulnerability was publicly reported by iDefense.

This document was written by Jeff Gennari.

Other Information

Date Public:	2004-10-18
Date First Published:	2004-11-12
Date Last Updated:	2004-11-15
CERT Advisory:
CVE-ID(s):
NVD-ID(s):
US-CERT Technical Alerts:
Metric:	3.59
Document Revision:	121

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