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Status published
Medium
CVE-2020-8492
Python 2.7 through 2.7.17, 3.5 through 3.5.9, 3.6 through 3.6.10,...
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://bugs.python.org/issue39503
- https://python-security.readthedocs.io/vuln/urllib-basic-auth-regex.html
- https://github.com/python/cpython/pull/18284
- https://security.netapp.com/advisory/ntap-20200221-0001/
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00003.html
- https://usn.ubuntu.com/4333-1/
- https://usn.ubuntu.com/4333-2/
- https://security.gentoo.org/glsa/202005-09
- 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/7WOKDEXLYW5UQ4S7PA7E37IITOC7C56J/
- 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/A5NSAX4SC3V64PGZUPH7PRDLSON34Q5A/
- https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html
- https://lists.apache.org/thread.html/rdb31a608dd6758c6093fd645aea3fbf022dd25b37109b6aaea5bc0b5%40%3Ccommits.cassandra.apache.org%3E
- https://lists.apache.org/thread.html/rfec113c733162b39633fd86a2d0f34bf42ac35f711b3ec1835c774da%40%3Ccommits.cassandra.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html
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Affected Vendor
python
View all reports →Affected Software
python, leap, ubuntu linux, fedora, debian linux
Vulnerable Versions:
2.7.0, 3.5.0, 3.6.0, 3.7.0, 3.8.0, 15.1, 12.04, 14.04, 16.04, 18.04, 19.10, 20.04, 31, 32, 9.0
Timeline
Official Publish:
January 30th, 2020
Last Modified:
August 4th, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.