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=========================================================== Ubuntu Security Notice USN-794-1 July 02, 2009 libcompress-raw-zlib-perl, perl vulnerability CVE-2009-1391 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 8.04 LTS Ubuntu 8.10 Ubuntu 9.04 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 8.04 LTS: libcompress-raw-zlib-perl 2.008-1ubuntu0.1 Ubuntu 8.10: libcompress-raw-zlib-perl 2.011-2ubuntu0.1 perl 5.10.0-11.1ubuntu2.3 Ubuntu 9.04: libcompress-raw-zlib-perl 2.015-1ubuntu0.1 perl 5.10.0-19ubuntu1.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: It was discovered that the Compress::Raw::Zlib Perl module incorrectly handled certain zlib compressed streams. If a user or automated system were tricked into processing a specially crafted compressed stream or file, a remote attacker could crash the application, leading to a denial of service.