USN-4038-4: bzip2 regression

4 July 2019

bzip2 regression

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

  • Ubuntu 14.04 ESM
  • Ubuntu 12.04 ESM


USN-4038-1 introduced a regression in bzip2.

Software Description

  • bzip2 - high-quality block-sorting file compressor - utilities


USN-4038-1 fixed a vulnerability in bzip2. The update introduced a regression causing bzip2 to incorrect raises CRC errors for some files. This update provides the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM.

We apologize for the inconvenience.

Original advisory details:

It was discovered that bzip2 incorrectly handled certain files. An attacker could possibly use this issue to execute arbitrary code.

Update instructions

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

Ubuntu 14.04 ESM
bzip2 - 1.0.6-5ubuntu0.1~esm2
lib32bz2-1.0 - 1.0.6-5ubuntu0.1~esm2
lib64bz2-1.0 - 1.0.6-5ubuntu0.1~esm2
libbz2-1.0 - 1.0.6-5ubuntu0.1~esm2
Ubuntu 12.04 ESM
bzip2 - 1.0.6-1ubuntu0.2
lib32bz2-1.0 - 1.0.6-1ubuntu0.2
lib64bz2-1.0 - 1.0.6-1ubuntu0.2
libbz2-1.0 - 1.0.6-1ubuntu0.2

To update your system, please follow these instructions:

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