USN-3199-3: Python Crypto vulnerability
Ubuntu Security Notice USN-3199-3
28th August, 2017
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
Programs using the Python Cryptography Toolkit could be made to crash or run programs if they receive specially crafted network traffic or other input.
- python-crypto - cryptographic algorithms and protocols for Python
USN-3199-1 fixed a vulnerability in Python Crypto. This update
provides the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
It was discovered that the ALGnew function in block_templace.c in the Python
Cryptography Toolkit contained a heap-based buffer overflow vulnerability.
A remote attacker could use this flaw to execute arbitrary code by using
a crafted initialization vector parameter.
The problem can be corrected by updating your system to the following package version:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.