USN-3720-1: python-cryptography vulnerability

23 July 2018

python-cryptography vulnerability

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

  • Ubuntu 18.04 LTS


python-cryptography could be made to expose sensitive information if it received a specially crafted input.

Software Description

  • python-cryptography - Cryptography Python library


It was discovered that python-cryptography incorrectly handled certain inputs. An attacker could possibly use this to get access to sensitive information.

Update instructions

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

Ubuntu 18.04 LTS
python-cryptography - 2.1.4-1ubuntu1.2
python3-cryptography - 2.1.4-1ubuntu1.2

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.