Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTNwcXgtNGZxZi1qNDlm

Deserialization of Untrusted Data in PyYAML

PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.

Permalink: https://github.com/advisories/GHSA-3pqx-4fqf-j49f
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTNwcXgtNGZxZi1qNDlm
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: about 3 years ago
Updated: over 1 year ago

CVSS Score: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-3pqx-4fqf-j49f, CVE-2019-20477
References:

• https://nvd.nist.gov/vuln/detail/CVE-2019-20477
• https://github.com/yaml/pyyaml/blob/master/CHANGES
• https://lists.fedoraproject.org/archives/list/[email protected]/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN/
• https://lists.fedoraproject.org/archives/list/[email protected]/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H/
• https://www.exploit-db.com/download/47655
• https://github.com/advisories/GHSA-3pqx-4fqf-j49f

Repository: https://github.com/yaml/pyyaml
Blast Radius: 49.9

Affected Packages