Ubuntu Security Notice USN-729-1
5th March, 2009
python-crypto vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 8.10
- Ubuntu 8.04 LTS
- Ubuntu 7.10
- Ubuntu 6.06 LTS
Software description
- python-crypto
Details
Mike Wiacek discovered that the ARC2 implementation in Python Crypto
did not correctly check the key length. If a user or automated system
were tricked into processing a malicious ARC2 stream, a remote attacker
could execute arbitrary code or crash the application using Python Crypto,
leading to a denial of service.
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 8.10:
- python-crypto 2.0.1+dfsg1-2.3ubuntu0.1
- Ubuntu 8.04 LTS:
- python-crypto 2.0.1+dfsg1-2.1ubuntu1.1
- Ubuntu 7.10:
- python-crypto 2.0.1+dfsg1-2ubuntu1.1
- Ubuntu 6.06 LTS:
- python2.4-crypto 2.0.1+dfsg1-1ubuntu1.1
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.