USN-2306-1: GNU C Library vulnerabilities

4 August 2014

eglibc vulnerabilities

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

  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in the GNU C Library.

Software Description

  • eglibc - GNU C Library

Details

Maksymilian Arciemowicz discovered that the GNU C Library incorrectly handled the getaddrinfo() function. An attacker could use this issue to cause a denial of service. This issue only affected Ubuntu 10.04 LTS. (CVE-2013-4357)

It was discovered that the GNU C Library incorrectly handled the getaddrinfo() function. An attacker could use this issue to cause a denial of service. This issue only affected Ubuntu 10.04 LTS and Ubuntu 12.04 LTS. (CVE-2013-4458)

Stephane Chazelas discovered that the GNU C Library incorrectly handled locale environment variables. An attacker could use this issue to possibly bypass certain restrictions such as the ForceCommand restrictions in OpenSSH. (CVE-2014-0475)

David Reid, Glyph Lefkowitz, and Alex Gaynor discovered that the GNU C Library incorrectly handled posix_spawn_file_actions_addopen() path arguments. An attacker could use this issue to cause a denial of service. (CVE-2014-4043)

Update instructions

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

Ubuntu 14.04 LTS
libc6 - 2.19-0ubuntu6.1
Ubuntu 12.04 LTS
libc6 - 2.15-0ubuntu10.6
Ubuntu 10.04 LTS
libc6 - 2.11.1-0ubuntu7.14

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References