USN-3407-1: PyJWT vulnerability
Ubuntu Security Notice USN-3407-1
30th August, 2017
pyjwt vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 17.04
- Ubuntu 16.04 LTS
Summary
PyJWT could be made to crash if it received specially crafted
input.
Software description
- pyjwt
– Python implementation of JSON Web Token
Details
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.
Update instructions
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.
References
Source: USN-3407-1: PyJWT vulnerability
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