USN-2306-1: GNU C Library vulnerabilities

Ubuntu Security Notice USN-2306-1

4th 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 version:

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

CVE-2013-4357, CVE-2013-4458, CVE-2014-0475, CVE-2014-4043