CVE-2017-11424 – pyjwt

Package

Manager: pip
Name: pyjwt
Vulnerable Version: >=0 <1.5.1

Severity

Level: High

CVSS v3.1: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: 0.01296 pctl0.78921

Details

PyJWT vulnerable to key confusion attacks In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.

Metadata

Created: 2022-05-13T01:42:19Z
Modified: 2024-10-15T16:34:39Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-r9jw-mwhq-wp62/GHSA-r9jw-mwhq-wp62.json
CWE IDs: []
Alternative ID: GHSA-r9jw-mwhq-wp62
Finding: F163
Auto approve: 1