--- title: 'USN-794-1: Perl vulnerability | Ubuntu security notices' description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/notices/USN-794-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-794-1 --- # USN-794-1: Perl vulnerability Publication date 2 July 2009 Overview Perl vulnerability Releases [9.04](https://ubuntu.com/security/notices?release=jaunty) [8.10](https://ubuntu.com/security/notices?release=intrepid) [8.04](https://ubuntu.com/security/notices?release=hardy) --- Open side navigation ## Packages * [libcompress-raw-zlib-perl](https://ubuntu.com/security/cves?package=libcompress-raw-zlib-perl) - * [perl](https://ubuntu.com/security/cves?package=perl) - ## Details 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. ## Update instructions In general, a standard system upgrade is sufficient to effect the necessary changes. [Learn more about how to get the fixes.](https://ubuntu.com/security/cves/about#security) The problem can be corrected by updating your system to the following package versions: | Ubuntu Release | Package Version | | --- | --- | | 9.04 jaunty | [libcompress-raw-zlib-perl](https://launchpad.net/ubuntu/+source/libcompress-raw-zlib-perl) –  [2.015-1ubuntu0.1](https://launchpad.net/ubuntu/+source/libcompress-raw-zlib-perl/2.015-1ubuntu0.1) | | | | [perl](https://launchpad.net/ubuntu/+source/perl) –  [5.10.0-19ubuntu1.1](https://launchpad.net/ubuntu/+source/perl/5.10.0-19ubuntu1.1) | | | | 8.10 intrepid | [libcompress-raw-zlib-perl](https://launchpad.net/ubuntu/+source/libcompress-raw-zlib-perl) –  [2.011-2ubuntu0.1](https://launchpad.net/ubuntu/+source/libcompress-raw-zlib-perl/2.011-2ubuntu0.1) | | | | [perl](https://launchpad.net/ubuntu/+source/perl) –  [5.10.0-11.1ubuntu2.3](https://launchpad.net/ubuntu/+source/perl/5.10.0-11.1ubuntu2.3) | | | | 8.04 hardy | [libcompress-raw-zlib-perl](https://launchpad.net/ubuntu/+source/libcompress-raw-zlib-perl) –  [2.008-1ubuntu0.1](https://launchpad.net/ubuntu/+source/libcompress-raw-zlib-perl/2.008-1ubuntu0.1) | | | --- ### Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. [Get Ubuntu Pro](https://ubuntu.com/pro) ## References * [CVE-2009-1391](https://ubuntu.com/security/CVE-2009-1391)