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OpenAdvisories
Medium ALAS2-2020-1432 1 CVE

Moderate: python security update (Amazon Linux 2)

Published Jun 1, 2020 · Updated Sep 23, 2025

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2018-20852: 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. 1740347: CVE-2018-20852 python: Cookie domain check returns incorrect results

Fixed packages 8

ReleasePackageFixed in
Amazon Linux · 2 python 0:2.7.18-1.amzn2
Amazon Linux · 2 python-debug 0:2.7.18-1.amzn2
Amazon Linux · 2 python-debuginfo 0:2.7.18-1.amzn2
Amazon Linux · 2 python-devel 0:2.7.18-1.amzn2
Amazon Linux · 2 python-libs 0:2.7.18-1.amzn2
Amazon Linux · 2 python-test 0:2.7.18-1.amzn2
Amazon Linux · 2 python-tools 0:2.7.18-1.amzn2
Amazon Linux · 2 tkinter 0:2.7.18-1.amzn2

Vulnerabilities 1

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2018-20852.html