USN-4218-1: GNU C Library vulnerability

10 December 2019

eglibc vulnerability

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

  • Ubuntu 14.04 ESM
  • Ubuntu 12.04 ESM


GNU C Library could be made to execute arbitrary code or cause a crash if it received a specially crafted input.

Software Description

  • eglibc - GNU C Library


Jakub Wilk discovered that GNU C Library incorrectly handled certain memory alignments. An attacker could possibly use this issue to execute arbitrary code or cause a crash.

Update instructions

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

Ubuntu 14.04 ESM
libc6 - 2.19-0ubuntu6.15+esm1
Ubuntu 12.04 ESM
libc6 - 2.15-0ubuntu10.22

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.