USN-3199-1: Python Crypto vulnerability

Ubuntu Security Notice USN-3199-1

16th February, 2017

Python Crypto vulnerability

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

• Ubuntu 16.10



• Ubuntu 16.04 LTS



• Ubuntu 14.04 LTS

Summary

Programs using the Python Cryptography Toolkit could be made to crash or run
programs if they receive specially crafted network traffic or other input.

Software description

• python-crypto
  - cryptographic algorithms and protocols for Python
  
  

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.

Update instructions

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

Ubuntu 16.10:

Ubuntu 16.04 LTS:

Ubuntu 14.04 LTS:

To update your system, please follow these instructions: