USN-2432-1: GNU C Library vulnerabilities

Releases

• Ubuntu 14.10
• Ubuntu 14.04 ESM
• Ubuntu 12.04
• Ubuntu 10.04

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

• libc6 - 2.19-10ubuntu2.1

Ubuntu 14.04

• libc6 - 2.19-0ubuntu6.4

Ubuntu 12.04

• libc6 - 2.15-0ubuntu10.9

Ubuntu 10.04

• libc6 - 2.11.1-0ubuntu7.19

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

References

• CVE-2012-6656
• CVE-2014-6040
• CVE-2014-7817