Moderate: libpng security update. Date: Fri, 26 Oct 2007 16:33:38 -0500 Reply-To: Troy Dawson Sender: Security Errata for Scientific Linux From: Troy Dawson Subject: Security ERRATA for libpng on SL3,x i386/x86_64 Comments: To:
A bug in the libpng library can be abused to crash programs making use of that library to decode PNG images.. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200405-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: libpng denial of service vulnerability Date: May 14, 2004 Bugs: #49887 ID: 200405-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= A bug in the libpng library can be abused to crash programs making use of that library to decode PNG images. Background ========= libpng is a standard library used to process PNG (Portable Network Graphics) images. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 media-libs/libpng = 1.2.5-r5 Description ========== libpng provides two functions (png_chunk_error and png_chunk_warning) for default error and warning messages handling. These functions do not perform proper bounds checking on the provided message, which is limited to 64 bytes. Programs linked against this library may crash when handling a malicious PNG image. Impact ===== This vulnerability could be used to crash various programs using the libpng library, potentially resulting in a denial of service attack on vulnerable daemon processes. Workaround ========= There is no known workaround at this time. All users are advised to upgrade to the latest available version of libpng. Resolution ========= All users of libpng should upgrade to the latest stable version: # emerge sync # emerge -pv"> =media-libs/libpng-1.2.5-r5" # emerge "> =media-libs/libpng-1.2.5-r5" You should also run revdep-rebuild to rebuild any packages that depend on older versions of libpng : # revdep-rebuild References ========= [ 1 ] CAN-2004-0421 https://www.cve.org/CVERecord?id=CAN-2004-0421 Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200405-06 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
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