Perl Compress::Raw modules: Denial of Service

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200908-07 / Compress-Raw-Zlib Compress-Raw-Bzip2
Release Date	August 18, 2009
Latest Revision	August 18, 2009: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	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

Related bugreports: #273141, #281955

Synopsis

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

2. Impact Information

Background

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

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.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

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

Code Listing 3.1: Resolution

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

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

Code Listing 3.2: Resolution

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

4. References

Updated August 18, 2009

Summary: This is a Gentoo Linux Security Advisory

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