Ubuntu 16.04 LTS : PyJWT vulnerability (USN-3407-1)

high Nessus Plugin ID 102857

Synopsis

The remote Ubuntu host is missing a security update.

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.

See Also

https://ubuntu.com/security/notices/USN-3407-1

Plugin Details

Severity: High

ID: 102857

File Name: ubuntu_USN-3407-1.nasl

Version: 3.8

Type: local

Agent: unix

Published: 8/31/2017

Updated: 10/23/2023

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2017-11424

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:python-jwt, p-cpe:/a:canonical:ubuntu_linux:python3-jwt, cpe:/o:canonical:ubuntu_linux:16.04:-:lts

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Ease: No known exploits are available

Patch Publication Date: 8/30/2017

Vulnerability Publication Date: 8/24/2017

Reference Information

CVE: CVE-2017-11424

USN: 3407-1