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[ GLSA 200804-06 ] UnZip: User-assisted execution of arbitrary code
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PostPosted: Sun Apr 06, 2008 6:26 pm    Post subject: [ GLSA 200804-06 ] UnZip: User-assisted execution of arbitra Reply with quote

Gentoo Linux Security Advisory

Title: UnZip: User-assisted execution of arbitrary code (GLSA 200804-06)
Severity: normal
Exploitable: remote
Date: April 06, 2008
Bug(s): #213761
ID: 200804-06

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: app-arch/unzip
Vulnerable: < 5.52-r2
Unaffected: >= 5.52-r2
Architectures: All supported architectures


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


References

CVE-2008-0888
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