USN-3407-1: PyJWT vulnerability
Ubuntu Security Notice USN-3407-1
30th August, 2017
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 17.04
- Ubuntu 16.04 LTS
PyJWT could be made to crash if it received specially crafted input.
- pyjwt - Python implementation of JSON Web Token
It was discovered that a vulnerability in PyJWT doesn't check
invalid_strings properly for some public keys. A remote attacker
could take advantage of a key confusion to craft JWTs from scratch.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 17.04:
- python-jwt 1.4.2-1ubuntu0.1
- python3-jwt 1.4.2-1ubuntu0.1
- Ubuntu 16.04 LTS:
- python-jwt 1.3.0-1ubuntu0.1
- python3-jwt 1.3.0-1ubuntu0.1
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.