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Security Advisories: GSA_kwCzR0hTQS12NHc1LXAyaGctOGZoNs4AAcGU

Urllib3 Incorrect Certificate Validation

Versions 1.17 and 1.18 of the Python urllib3 library suffer from a vulnerability that can cause them, in certain configurations, to not correctly validate TLS certificates. This places users of the library with those configurations at risk of man-in-the-middle and information leakage attacks. This vulnerability affects users using versions 1.17 and 1.18 of the urllib3 library, who are using the optional PyOpenSSL support for TLS instead of the regular standard library TLS backend, and who are using OpenSSL 1.1.0 via PyOpenSSL. This is an extremely uncommon configuration, so the security impact of this vulnerability is low.

Permalink: https://github.com/advisories/GHSA-v4w5-p2hg-8fh6
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS12NHc1LXAyaGctOGZoNs4AAcGU
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Low
Classification: General
Published: almost 2 years ago
Updated: 5 months ago

CVSS Score: 3.7
CVSS vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Identifiers: GHSA-v4w5-p2hg-8fh6, CVE-2016-9015
References:

• https://nvd.nist.gov/vuln/detail/CVE-2016-9015
• http://www.openwall.com/lists/oss-security/2016/10/27/6
• https://web.archive.org/web/20210123184150/http://www.securityfocus.com/bid/93941
• https://github.com/urllib3/urllib3/commit/c32cdbc16a9634fa0f8c829d1270301570158715
• https://github.com/advisories/GHSA-v4w5-p2hg-8fh6

Repository: https://github.com/urllib3/urllib3
Blast Radius: 20.8

Affected Packages