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Perl Compress::Raw modules: Denial of Service


1.  Gentoo Linux Security Advisory

Version Information

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


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

2.  Impact Information


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


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).


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


There is no known workaround at this time.


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


Page updated August 18, 2009

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