USN-2489-1: unzip vulnerability

3 February 2015

unzip vulnerability

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

  • Ubuntu 14.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS

Software Description

  • unzip - De-archiver for .zip files


Michal Zalewski discovered that unzip incorrectly handled certain malformed zip archives. If a user or automated system were tricked into processing a specially crafted zip archive, an attacker could possibly execute arbitrary code.

Update instructions

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

Ubuntu 14.10
unzip - 6.0-12ubuntu1.2
Ubuntu 14.04 LTS
unzip - 6.0-9ubuntu1.2
Ubuntu 12.04 LTS
unzip - 6.0-4ubuntu2.2
Ubuntu 10.04 LTS
unzip - 6.0-1ubuntu0.2

To update your system, please follow these instructions:

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