CVE-2020-8492

Public Exploit

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 4.23% Top 15%
Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory gentoo.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory python.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugs.python.org/issue39503 issue tracking vendor advisory
https://python-security.readthedocs.io/vuln/urllib-basic-auth-regex.html third party advisory exploit
https://github.com/python/cpython/pull/18284 third party advisory patch
https://security.netapp.com/advisory/ntap-20200221-0001/ third party advisory
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00003.html third party advisory vendor advisory
https://usn.ubuntu.com/4333-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4333-2/ third party advisory vendor advisory
https://security.gentoo.org/glsa/202005-09 third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APGWEMYZIY5VHLCSZ3HD67PA5Z2UQFGH/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WOKDEXLYW5UQ4S7PA7E37IITOC7C56J/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UESGYI5XDAHJBATEZN3MHNDUBDH47AS6/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A5NSAX4SC3V64PGZUPH7PRDLSON34Q5A/ vendor advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html third party advisory mailing list
https://lists.apache.org/thread.html/rdb31a608dd6758c6093fd645aea3fbf022dd25b37109b6aaea5bc0b5%40%3Ccommits.cassandra.apache.org%3E mailing list
https://lists.apache.org/thread.html/rfec113c733162b39633fd86a2d0f34bf42ac35f711b3ec1835c774da%40%3Ccommits.cassandra.apache.org%3E mailing list
https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html mailing list

Frequently Asked Questions

What is the severity of CVE-2020-8492?
CVE-2020-8492 has been scored as a medium severity vulnerability.
How to fix CVE-2020-8492?
To fix CVE-2020-8492, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-8492 being actively exploited in the wild?
It is possible that CVE-2020-8492 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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