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Improper Input Validation Affecting python3-libs package, versions <0:3.6.8-13.el7

Severity

 Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.52% (78th percentile)

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  • Snyk IDSNYK-CENTOS7-PYTHON3LIBS-2156943
  • published26 Jul 2021
  • disclosed31 Oct 2018
Report a new vulnerability Found a mistake?

Introduced: 31 Oct 2018

CVE-2018-20852  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Centos:7 python3-libs to version 0:3.6.8-13.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-libs package and not the python3-libs package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py in Python before 3.7.3 does not correctly validate the domain: it can be tricked into sending existing cookies to the wrong server. An attacker may abuse this flaw by using a server with a hostname that has another valid hostname as a suffix (e.g., pythonicexample.com to steal cookies for example.com). When a program uses http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an attacker-controlled server, existing cookies can be leaked to the attacker. This affects 2.x through 2.7.16, 3.x before 3.4.10, 3.5.x before 3.5.7, 3.6.x before 3.6.9, and 3.7.x before 3.7.3.

References