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[ GLSA 200410-31 ] Archive::Zip: Virus detection evasion
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GLSA
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Joined: 13 Jun 2003
Posts: 4078
Location: Barcelona, Spain

PostPosted: Fri Oct 29, 2004 1:20 pm    Post subject: [ GLSA 200410-31 ] Archive::Zip: Virus detection evasion Reply with quote

Gentoo Linux Security Advisory

Title: Archive::Zip: Virus detection evasion (GLSA 200410-31)
Severity: low
Exploitable: remote
Date: October 29, 2004
Updated: May 22, 2006
Bug(s): #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: dev-perl/Archive-Zip
Vulnerable: < 1.14
Unaffected: >= 1.14
Architectures: All supported architectures


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:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-perl/Archive-Zip-1.14"


References

iDEFENSE Security Advisory 10.18.04
rt.cpan.org bug #8077
CVE-2004-1096


Last edited by GLSA on Thu Aug 05, 2010 4:17 am; edited 6 times in total
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