CVE-2020-8492

medium

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.

References

Advisories
More

https://usn.ubuntu.com/4333-2/

https://usn.ubuntu.com/4333-1/

https://security.netapp.com/advisory/ntap-20200221-0001/

https://security.gentoo.org/glsa/202005-09

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UESGYI5XDAHJBATEZN3MHNDUBDH47AS6/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APGWEMYZIY5VHLCSZ3HD67PA5Z2UQFGH/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A5NSAX4SC3V64PGZUPH7PRDLSON34Q5A/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WOKDEXLYW5UQ4S7PA7E37IITOC7C56J/

https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html

https://github.com/python/cpython/pull/18284

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00003.html

https://python-security.readthedocs.io/vuln/urllib-basic-auth-regex.html

https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html

https://lists.apache.org/thread.html/rfec113c733162b39633fd86a2d0f34bf42ac35f711b3ec1835c774da%40%3Ccommits.cassandra.apache.org%3E

https://lists.apache.org/thread.html/rdb31a608dd6758c6093fd645aea3fbf022dd25b37109b6aaea5bc0b5%40%3Ccommits.cassandra.apache.org%3E

https://bugs.python.org/issue39503

Details

Source: Mitre, NVD

Published: 2020-01-30

Updated: 2024-11-21

Risk Information

CVSS v2

Base Score: 7.1

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Severity: Medium

EPSS

EPSS: 0.04231