Ubuntu Security Notice USN-889-1
20th 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 version:
- 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.