[USN-1175-1] libpng vulnerabilities

2011-07-26T00:00:00
ID SECURITYVULNS:DOC:26714
Type securityvulns
Reporter Securityvulns
Modified 2011-07-26T00:00:00

Description

========================================================================== Ubuntu Security Notice USN-1175-1 July 26, 2011

libpng vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS
  • Ubuntu 8.04 LTS

Summary:

Libpng could be made to run programs as your login if it opened a specially crafted file.

Software Description: - libpng: PNG (Portable Network Graphics) file library

Details:

Frank Busse discovered that libpng did not properly handle certain malformed PNG images. If a user or automated system were tricked into opening a crafted PNG file, an attacker could cause libpng to crash, resulting in a denial of service. This issue only affected Ubuntu 10.04 LTS, 10.10, and 11.04. (CVE-2011-2501)

It was discovered that libpng did not properly handle certain malformed PNG images. If a user or automated system were tricked into opening a crafted PNG file, an attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. (CVE-2011-2690)

Frank Busse discovered that libpng did not properly handle certain PNG images with invalid sCAL chunks. If a user or automated system were tricked into opening a crafted PNG file, an attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. (CVE-2011-2692)

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 11.04: libpng12-0 1.2.44-1ubuntu3.1

Ubuntu 10.10: libpng12-0 1.2.44-1ubuntu0.1

Ubuntu 10.04 LTS: libpng12-0 1.2.42-1ubuntu2.2

Ubuntu 8.04 LTS: libpng12-0 1.2.15~beta5-3ubuntu0.4

After a standard system update you need to reboot your computer to make all the necessary changes.

References: http://www.ubuntu.com/usn/usn-1175-1 CVE-2011-2501, CVE-2011-2690, CVE-2011-2692

Package Information: https://launchpad.net/ubuntu/+source/libpng/1.2.44-1ubuntu3.1 https://launchpad.net/ubuntu/+source/libpng/1.2.44-1ubuntu0.1 https://launchpad.net/ubuntu/+source/libpng/1.2.42-1ubuntu2.2 https://launchpad.net/ubuntu/+source/libpng/1.2.15~beta5-3ubuntu0.4