Ubuntu 16.04 LTS / 17.04 : pyjwt vulnerability (USN-3407-1)

Ubuntu Security Notice (C) 2017 Canonical, Inc. / NASL script (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related
patches.

Description :

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.

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

Solution :

Update the affected python-jwt and / or python3-jwt packages.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N)
CVSS Temporal Score : 4.1
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 102857 ()

Bugtraq ID:

CVE ID: CVE-2017-11424

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