USN-2485-1: GNU C Library vulnerability

Ubuntu Security Notice USN-2485-1

27th January, 2015

eglibc vulnerability

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

  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


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

Software description

  • eglibc - GNU C Library


It was discovered that a buffer overflow existed in the gethostbyname
and gethostbyname2 functions in the GNU C Library. An attacker could
use this issue to execute arbitrary code or cause an application crash,
resulting in a denial of service.

Update instructions

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

Ubuntu 12.04 LTS:
libc6 2.15-0ubuntu10.10
Ubuntu 10.04 LTS:
libc6 2.11.1-0ubuntu7.20

To update your system, please follow these instructions:

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