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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Python
PublishedJan 30, 2020
First seenJan 30, 2020
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Vendor advisories
- usn.ubuntu.com/4333-1/
- usn.ubuntu.com/4333-2/
- security.gentoo.org/glsa/202005-09
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APGWEMYZIY5VHLCSZ3HD67PA5Z2UQFGH/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WOKDEXLYW5UQ4S7PA7E37IITOC7C56J/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UESGYI5XDAHJBATEZN3MHNDUBDH47AS6/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A5NSAX4SC3V64PGZUPH7PRDLSON34Q5A/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| python python | 2.7.0 ≤ v ≤ 2.7.17, 3.5.0 ≤ v ≤ 3.5.9, 3.6.0 ≤ v ≤ 3.6.10, 3.7.0 ≤ v ≤ 3.7.6, 3.8.0 ≤ v ≤ 3.8.1 | — |
| opensuse leap | 15.1 | — |
| canonical ubuntu_linux | 12.04, 14.04, 16.04, 18.04, 19.10, 20.04 | — |
| fedoraproject fedora | 31, 32 | — |
| debian debian_linux | 9.0 | — |
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