GLSA 200405-06: libpng denial of service vulnerability
Severity: | normal |
Title: | libpng denial of service vulnerability |
Date: | 05/14/2004 |
Bugs: |
|
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 | Architecture(s) |
---|---|---|---|
media-libs/libpng | <= 1.2.5-r4 | >= 1.2.5-r5 | All supported architectures |
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
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
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@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License
Copyright 2010 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.