=========================================================== Ubuntu Security Notice USN-473-1 June 11, 2007 libgd2 vulnerabilities CVE-2007-0455, CVE-2007-2756 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 6.10 Ubuntu 7.04 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 6.06 LTS: libgd2-noxpm 2.0.33-2ubuntu5.2 libgd2-xpm 2.0.33-2ubuntu5.2 Ubuntu 6.10: libgd2-noxpm 2.0.33-4ubuntu2.1 libgd2-xpm 2.0.33-4ubuntu2.1 Ubuntu 7.04: libgd2-noxpm 2.0.34~rc1-2ubuntu1.1 libgd2-xpm 2.0.34~rc1-2ubuntu1.1 After a standard system upgrade you need to reboot your computer to effect the necessary changes. Details follow: A buffer overflow was discovered in libgd2's font renderer. By tricking an application using libgd2 into rendering a specially crafted string with a JIS encoded font, a remote attacker could read heap memory or crash the application, leading to a denial of service. (CVE-2007-0455) Xavier Roche discovered that libgd2 did not correctly validate PNG callback results. If an application were tricked into processing a specially crafted PNG image, it would monopolize CPU resources. Since libgd2 is often used in PHP and Perl web applications, this could lead to a remote denial of service. (CVE-2007-2756) Updated packages for Ubuntu 6.06 LTS: Source archives: http://security.ubuntu.com/ubuntu/pool/main/libg/libgd2/libgd2_2.0.33-2ubuntu5.2.diff.gz Size/MD5: 256873 8a8c75ce9c758b08a469529dd55c761b http://security.ubuntu.com/ubuntu/pool/main/libg/libgd2/libgd2_2.0.33-2ubuntu5.2.dsc Size/MD5: 965 fc70ffc72898f2721f19b6bd73eacf20 http://security.ubuntu.com/ubuntu/pool/main/libg/libgd2/libgd2_2.0.33.orig.tar.gz Size/MD5: 587617 be0a6d326cd8567e736fbc75df0a5c45 Architecture independent packages: http://security.ubuntu.com/ubuntu/pool/main/libg/libgd2/libgd2-dev_2.0.33-2ubuntu5.2_all.deb Size/MD5: 129406 fef2507d7ed87eb033a3ec1075eae8d0 http://security.ubuntu.com/ubuntu/pool/universe/libg/libgd2/libgd2_2.0.33-2ubuntu5.2_all.deb Size/MD5: 129384 1a94025235145b79dec9002f40500005 amd64 architecture (Athlon64, Opteron, EM64T Xeon) http://security.ubuntu.com/ubuntu/pool/universe/libg/libgd2/libgd-tools_2.0.33-2ubuntu5.2_amd64.deb Size/MD5: 142846 b5610b98a36002b562ae6efca20a4bd0 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