CVE-2020-8492
- State
- Published
- Severity
- 6.5 Medium
- Published
- Jan 30, 2020
- Updated
- Oct 14, 2026
- Reserved
- Jan 30, 2020
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | CISA-ADP |
Weaknesses
- CWE-400 Uncontrolled Resource Consumption
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
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/
- openSUSE-SU-2020:0274vendor-advisory
- USN-4333-1vendor-advisory
- USN-4333-2vendor-advisory
- GLSA-202005-09vendor-advisory
- FEDORA-2020-98e0f0f11bvendor-advisory
- FEDORA-2020-6a88dad4a0vendor-advisory
- FEDORA-2020-8bdd3fd7a4vendor-advisory
- FEDORA-2020-ea5bdbcc90vendor-advisory
- [debian-lts-announce] 20200715 [SECURITY] [DLA 2280-1] python3.5 security updatemailing-list
- [cassandra-commits] 20210816 [jira] [Created] (CASSANDRA-16857) Security vulnerability CVE-2020-8492mailing-list
- [cassandra-commits] 20210816 [jira] [Updated] (CASSANDRA-16857) Security vulnerability CVE-2020-8492mailing-list
- [debian-lts-announce] 20230524 [SECURITY] [DLA 3432-1] python2.7 security updatemailing-list
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
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