CVE-2020-14343 – pyyaml

Package

Manager: pip
Name: pyyaml
Vulnerable Version: >=0 <5.4

Severity

Level: Critical

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

EPSS: 0.13704 pctl0.94014

Details

Improper Input Validation in PyYAML A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747.

Metadata

Created: 2021-03-25T21:26:26Z
Modified: 2024-10-25T21:31:44Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/03/GHSA-8q59-q68h-6hv4/GHSA-8q59-q68h-6hv4.json
CWE IDs: ["CWE-20"]
Alternative ID: GHSA-8q59-q68h-6hv4
Finding: F184
Auto approve: 1