CVE-2020-8492 Information

Description

Python 2.7 through 2.7.17 3.5 through 3.5.9 3.6 through 3.6.10 3.7 through 3.7.6 and 3.8 through 3.8.1 allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client because of urllib.request.AbstractBasicAuthHandler catastrophic backtracking.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Reference

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00003.html https://bugs.python.org/issue39503 https://github.com/python/cpython/pull/18284 https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7WOKDEXLYW5UQ4S7PA7E37IITOC7C56J/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5NSAX4SC3V64PGZUPH7PRDLSON34Q5A/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/APGWEMYZIY5VHLCSZ3HD67PA5Z2UQFGH/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UESGYI5XDAHJBATEZN3MHNDUBDH47AS6/ https://python-security.readthedocs.io/vuln/urllib-basic-auth-regex.html https://python-security.readthedocs.io/vuln/urllib-basic-auth-regex.html https://security.gentoo.org/glsa/202005-09 https://security.netapp.com/advisory/ntap-20200221-0001/ https://usn.ubuntu.com/4333-1/ https://usn.ubuntu.com/4333-2/ Python 2.7 through 2.7.17 3.5 through 3.5.9 3.6 through 3.6.10 3.7 through 3.7.6 and 3.8 through 3.8.1 allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client because of urllib.request.AbstractBasicAuthHandler catastrophic backtracking.

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5