USN-2432-1: GNU C Library vulnerabilities

03 December 2014

The GNU C Library could be made to crash or run programs.

Releases

Packages

  • eglibc - GNU C Library
  • glibc - GNU C Library

Details

Siddhesh Poyarekar discovered that the GNU C Library incorrectly handled
certain multibyte characters when using the iconv function. An attacker
could possibly use this issue to cause applications to crash, resulting in
a denial of service. This issue only affected Ubuntu 10.04 LTS and Ubuntu
12.04 LTS. (CVE-2012-6656)

Adhemerval Zanella Netto discovered that the GNU C Library incorrectly
handled certain multibyte characters when using the iconv function. An
attacker could possibly use this issue to cause applications to crash,
resulting in a denial of service. (CVE-2014-6040)

Tim Waugh discovered that the GNU C Library incorrectly enforced the
WRDE_NOCMD flag when handling the wordexp function. An attacker could
possibly use this issue to execute arbitrary commands. (CVE-2014-7817)

Update instructions

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

Ubuntu 14.10
Ubuntu 14.04
Ubuntu 12.04
Ubuntu 10.04

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