USN-889-1: gzip vulnerabilities

20 January 2010

gzip vulnerabilities

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

  • Ubuntu 9.10
  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 6.06 LTS

Software Description

  • gzip

Details

It was discovered that gzip incorrectly handled certain malformed compressed files. If a user or automated system were tricked into opening a specially crafted gzip file, an attacker could cause gzip to crash or possibly execute arbitrary code with the privileges of the user invoking the program. (CVE-2009-2624)

Aki Helin discovered that gzip incorrectly handled certain malformed files compressed with the Lempel–Ziv–Welch (LZW) algorithm. If a user or automated system were tricked into opening a specially crafted gzip file, an attacker could cause gzip to crash or possibly execute arbitrary code with the privileges of the user invoking the program. (CVE-2010-0001)

Update instructions

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

Ubuntu 9.10
gzip - 1.3.12-8ubuntu1.1
Ubuntu 9.04
gzip - 1.3.12-6ubuntu2.9.04.1
Ubuntu 8.10
gzip - 1.3.12-6ubuntu2.8.10.1
Ubuntu 8.04 LTS
gzip - 1.3.12-3.2ubuntu0.1
Ubuntu 6.06 LTS
gzip - 1.3.5-12ubuntu0.3

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

In general, a standard system upgrade is sufficient to effect the necessary changes.

References