Ubuntu Security Notice USN-3407-1
30th August, 2017
A security issue affects these releases of Ubuntu and its
- Ubuntu 17.04
- Ubuntu 16.04 LTS
PyJWT could be made to crash if it received specially crafted
– 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
- Ubuntu 17.04:
- Ubuntu 16.04 LTS:
To update your system, please follow these instructions:
In general, a standard system update will make all the necessary changes.