- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200412-17 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: kfax: Multiple overflows in the included TIFF library Date: December 19, 2004 Bugs: #73795 ID: 200412-17 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== kfax contains several buffer overflows potentially leading to execution of arbitrary code. Background ========== KDE is a feature-rich graphical desktop environment for Linux and Unix-like Operating Systems. kfax (part of kdegraphics) is the KDE fax file viewer. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 kde-base/kdegraphics < 3.3.1 Vulnerable! ------------------------------------------------------------------- NOTE: Certain packages are still vulnerable. See Workaround. Description =========== Than Ngo discovered that kfax contains a private copy of the TIFF library and is therefore subject to several known vulnerabilities (see References). Impact ====== A remote attacker could entice a user to view a carefully-crafted TIFF image file with kfax, which would potentially lead to execution of arbitrary code with the rights of the user running kfax. Workaround ========== The KDE Team recommends to remove the kfax binary as well as the kfaxpart.la KPart: rm /usr/kde/3.*/lib/kde3/kfaxpart.la rm /usr/kde/3.*/bin/kfax Note: This will render the kfax functionality useless, if kfax functionality is needed you should upgrade to the KDE 3.3.2 which is not stable at the time of this writing. Resolution ========== All kfax users should use the workaround as no patches are available yet. References ========== [ 1 ] KDE Security Advisory: kfax libtiff vulnerabilities http://www.kde.org/info/security/advisory-20041209-2.txt [ 2 ] GLSA 200410-11 http://www.gentoo.org/security/en/glsa/glsa-200410-11.xml [ 3 ] CAN-2004-0803 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0803 [ 4 ] CAN-2004-0804 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0804 [ 5 ] CAN-2004-0886 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0886 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200412-17.xml Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@xxxxxxxxxx or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2004 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.0
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