CVE-2020-8492

CVSS V2 High 7.1 CVSS V3 Medium 6.5
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.
Overview
  • CVE ID
  • CVE-2020-8492
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-01-30T19:15:12
  • Last Modified Date
  • 2021-09-16T15:46:26
Weakness Enumerations
CWE URL
CWE-400 http://cwe.mitre.org/data/definitions/400.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 1 OR 2.7.0 2.7.17
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 1 OR 3.5.0 3.5.9
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 1 OR 3.6.0 3.6.10
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 1 OR 3.7.0 3.7.6
cpe:2.3:a:python:python:*:*:*:*:*:*:*:* 1 OR 3.8.0 3.8.1
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:N/I:N/A:C
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 7.1
  • Severity
  • HIGH
  • Exploitability Score
  • 8.6
  • Impact Score
  • 6.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 6.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://github.com/python/cpython/pull/18284 Patch Third Party Advisory
https://python-security.readthedocs.io/vuln/urllib-basic-auth-regex.html Exploit Third Party Advisory
https://bugs.python.org/issue39503 Issue Tracking Vendor Advisory
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
https://usn.ubuntu.com/4333-1/ Third Party Advisory
https://usn.ubuntu.com/4333-2/ Third Party Advisory
https://security.gentoo.org/glsa/202005-09 Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/APGWEMYZIY5VHLCSZ3HD67PA5Z2UQFGH/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7WOKDEXLYW5UQ4S7PA7E37IITOC7C56J/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UESGYI5XDAHJBATEZN3MHNDUBDH47AS6/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5NSAX4SC3V64PGZUPH7PRDLSON34Q5A/ Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html Mailing List Third Party Advisory
https://lists.apache.org/thread.html/rdb31a608dd6758c6093fd645aea3fbf022dd25b37109b6aaea5bc0b5@%3Ccommits.cassandra.apache.org%3E Mailing List Third Party Advisory
https://lists.apache.org/thread.html/rfec113c733162b39633fd86a2d0f34bf42ac35f711b3ec1835c774da@%3Ccommits.cassandra.apache.org%3E Mailing List Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-8492
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8492
History
Created Old Value New Value Data Type Notes
2022-05-10 16:04:56 Added to TrackCVE
2022-12-04 10:28:08 2020-01-30T19:15Z 2020-01-30T19:15:12 CVE Published Date updated
2022-12-04 10:28:08 2021-09-16T15:46:26 CVE Modified Date updated
2022-12-04 10:28:08 Analyzed Vulnerability Status updated