GLSA 200908-07: Perl Compress::Raw modules: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	Perl Compress::Raw modules: Denial of Service
Date:	08/18/2009
Bugs:	#273141, #281955
ID:	200908-07

Synopsis

An off-by-one error in Compress::Raw::Zlib and Compress::Raw::Bzip2 might lead to a Denial of Service.

Background

Compress::Raw::Zlib and Compress::Raw::Bzip2 are Perl low-level interfaces to the zlib and bzip2 compression libraries.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
perl-core/Compress-Raw-Zlib	< 2.020	>= 2.020	All supported architectures
perl-core/Compress-Raw-Bzip2	< 2.020	>= 2.020	All supported architectures

Description

Leo Bergolth reported an off-by-one error in the inflate() function in Zlib.xs of Compress::Raw::Zlib, possibly leading to a heap-based buffer overflow (CVE-2009-1391).

Paul Marquess discovered a similar vulnerability in the bzinflate() function in Bzip2.xs of Compress::Raw::Bzip2 (CVE-2009-1884).

Impact

A remote attacker might entice a user or automated system (for instance running SpamAssassin or AMaViS) to process specially crafted files, possibly resulting in a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All Compress::Raw::Zlib users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=perl-core/Compress-Raw-Zlib-2.020"

All Compress::Raw::Bzip2 users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=perl-core/Compress-Raw-Bzip2-2.020"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200908-07.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 https://bugs.gentoo.org.