Python: Denial of service

Background

Python is an interpreted, interactive, object-oriented programming language.

Description

An issue was discovered in urllib.request.AbstractBasicAuthHandler which allowed a remote attacker to send malicious data causing extensive regular expression backtracking.

Impact

An attacker could cause a possible Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All Python 2.7 users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-lang/python-2.7.18-r2:2.7"

All Python 3.6 users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-lang/python-3.6.10-r2:3.6"

All Python 3.7 users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-lang/python-3.7.7-r2:3.7"

All Python 3.8 users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-lang/python-3.8.2-r2:3.8"