USN-4038-4: bzip2 regression

Releases

• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

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

Details

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

• 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

• 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

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

References

• https://launchpad.net/bugs/1834494