GLSA 201010-01: Libpng: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Libpng: Multiple vulnerabilities
Date:	10/05/2010
Bugs:	#307637, #324153, #335887
ID:	201010-01

Synopsis

Multiple vulnerabilities in libpng might lead to privilege escalation or a Denial of Service.

Background

libpng is a standard library used to process PNG (Portable Network Graphics) images. It is used by several programs, including web browsers and potentially server processes.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
media-libs/libpng	< 1.4.3	>= 1.4.3	All supported architectures

Description

Multiple vulnerabilities were found in libpng:

The png_decompress_chunk() function in pngrutil.c does not properly handle certain type of compressed data (CVE-2010-0205)
A buffer overflow in pngread.c when using progressive applications (CVE-2010-1205)
A memory leak in pngrutil.c when dealing with a certain type of chunks (CVE-2010-2249)

Impact

An attacker could exploit these vulnerabilities to cause programs linked against the library to crash or execute arbitrary code with the permissions of the user running the vulnerable program, which could be the root user.

Workaround

There is no known workaround at this time.

Resolution

All libpng 1.4 users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=media-libs/libpng-1.4.3"

All libpng 1.2 users should upgrade to the latest version:


      # emerge --sync
      # emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.46"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201010-01.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@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.