USN-3276-3: shadow vulnerability

14 November 2017

shadow vulnerability

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

  • Ubuntu 12.04 ESM


su could be made to crash or stop programs as an administrator.

Software Description

  • shadow - system login tools


USN-3276-1 and USN-3276-2 fixed vulnerabilities in shadow. This update provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

Sebastian Krahmer discovered integer overflows in shadow utilities. A local attacker could possibly cause them to crash or potentially gain privileges via crafted input. (CVE-2016-6252)

Update instructions

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

Ubuntu 12.04 ESM
login - 1:
passwd - 1:

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.