USN-4038-3: bzip2 regression

4 July 2019

bzip2 regression

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

  • Ubuntu 19.04
  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS


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.

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 19.04
bzip2 - 1.0.6-9ubuntu0.19.04.1
libbz2-1.0 - 1.0.6-9ubuntu0.19.04.1
Ubuntu 18.10
bzip2 - 1.0.6-9ubuntu0.18.10.1
libbz2-1.0 - 1.0.6-9ubuntu0.18.10.1
Ubuntu 18.04 LTS
bzip2 - 1.0.6-8.1ubuntu0.2
libbz2-1.0 - 1.0.6-8.1ubuntu0.2
Ubuntu 16.04 LTS
bzip2 - 1.0.6-8ubuntu0.2
libbz2-1.0 - 1.0.6-8ubuntu0.2

To update your system, please follow these instructions:

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