CVE-2016-9015

Low

Description

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.

SeverityLow
CVSS3.7
Exploit probability—
ProductPython Urllib3
PublishedJan 11, 2017
First seenJan 11, 2017

How to fix

Update
  • urllib31.18.1 or later

Affected products

ProductAffected versionsFixed in
python urllib31.17, 1.18—
urllib3PyPI1.17 ≤ v < 1.18.11.18.1

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