========================================================================== Ubuntu Security Notice USN-3407-1 August 30, 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 versions: 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 In general, a standard system update will make all the necessary changes. References: https://www.ubuntu.com/usn/usn-3407-1 CVE-2017-11424 Package Information: https://launchpad.net/ubuntu/+source/pyjwt/1.4.2-1ubuntu0.1 https://launchpad.net/ubuntu/+source/pyjwt/1.3.0-1ubuntu0.1
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