GLSA 200711-08: libpng: Multiple Denials of Service
| Severity: | normal |
| Title: | libpng: Multiple Denials of Service |
| Date: | 11/07/2007 |
| Bugs: | |
| ID: | 200711-08 |
Synopsis
Several vulnerabilities in libpng may allow a remote attacker to crash applications that handle untrusted images.Background
libpng is a free ANSI C library used to process and manipulate PNG images.
Affected packages
| Package | Vulnerable | Unaffected | Architecture(s) |
|---|---|---|---|
| media-libs/libpng | < 1.2.21-r3 | >= 1.2.21-r3 | All supported architectures |
Description
An off-by-one error when handling ICC profile chunks in the png_set_iCCP() function was discovered (CVE-2007-5266). George Cook and Jeff Phillips reported several errors in pngrtran.c, the use of logical instead of a bitwise functions and incorrect comparisons (CVE-2007-5268). Tavis Ormandy reported out-of-bounds read errors in several PNG chunk handling functions (CVE-2007-5269).
Impact
A remote attacker could craft an image that when processed or viewed by an application using libpng would cause the application to terminate abnormally.
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-1.2.21-r3"
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.