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Gentoo GLSA-200903-28 Normal: libpng Memory Corruption Risks

Multiple vulnerabilities were found in libpng, which might result in the execution of arbitrary code. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200903-28 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: libpng: Multiple vulnerabilities Date: March 15, 2009 Bugs: #244808, #255231, #259578 ID: 200903-28 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= Multiple vulnerabilities were found in libpng, which might result in the execution of arbitrary code Background ========= libpng is the official PNG reference library used to read, write and manipulate PNG images. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 media-libs/libpng < 1.2.35 > = 1.2.35 Description ========== Multiple vulnerabilities were discovered in libpng: * A memory leak bug was reported in png_handle_tEXt(), a function that is used while reading PNG images (CVE-2008-6218). * A memory overwrite bug was reported by Jon Foster in png_check_keyword(), caused by writing overlong keywords to a PNG file (CVE-2008-5907). * A memory corruption issue, caused by an incorrect handling of an out of memory condition has been reported by Tavis Ormandy of the Google Security Team. That vulnerability affects direct uses of png_read_png(), pCAL chunk and 16-bit gamma table handling (CVE-2009-0040). Impact ===== A remote attacker may execute arbitrary code with the privileges of the user opening a specially crafted PNG file by exploiting the erroneous out-of-memoryhandling. An attacker may also exploit the png_check_keyword() error to set arbitrary memory locations to 0, if the application allows overlong, user-controlled keywords when writing PNG files. The png_handle_tEXT() vulnerability may be exploited by an attacker to potentially consume all memory on a users system when a specially crafted PNG file is opened. Workaround ========= There is no known workaround at this time. Resolution ========= All libpng users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose "> =media-libs/libpng-1.2.35" References ========= [ 1 ] CVE-2008-5907 https://www.cve.org/CVERecord?id=CVE-2008-5907 [ 2 ] CVE-2008-6218 https://www.cve.org/CVERecord?id=CVE-2008-6218 [ 3 ] CVE-2009-0040 https://www.cve.org/CVERecord?id=CVE-2009-0040 Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200903-28 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 This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at https://bugs.gentoo.org/. License ====== Copyright 2009 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. https://creativecommons.org/licenses/by-sa/2.5/ . Numerous security flaws in libpng may permit unauthorized code execution. Update to mitigate potential threats in Gentoo.. libpng vulnerabilities, memory corruption, Gentoo advisory. . LinuxSecurity.com Team

Mar 15, 2009 Gentoo