USN-3132-1: tar vulnerability

21 November 2016

tar vulnerability

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

  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS

Summary

tar could be made to overwrite files.

Software Description

  • tar - GNU version of the tar archiving utility

Details

Harry Sintonen discovered that tar incorrectly handled extracting files when path names are specified on the command line. If a user or automated system were tricked into processing a specially crafted archive, an attacker could possibly overwrite arbitrary files.

Update instructions

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

Ubuntu 16.10
tar - 1.29b-1ubuntu0.1
Ubuntu 16.04 LTS
tar - 1.28-2.1ubuntu0.1
Ubuntu 14.04 LTS
tar - 1.27.1-1ubuntu0.1
Ubuntu 12.04 LTS
tar - 1.26-4ubuntu1.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References