Resource Exhaustion Affecting python3.5 package, versions <3.5.2-2ubuntu0~16.04.13+esm1
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Test your applications- Snyk ID SNYK-UBUNTU1604-PYTHON35-1582750
- published 4 Sep 2021
- disclosed 10 Mar 2022
Introduced: 4 Sep 2021
CVE-2021-3733 Open this link in a new tabHow to fix?
Upgrade Ubuntu:16.04 python3.5 to version 3.5.2-2ubuntu0~16.04.13+esm1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python3.5 package and not the python3.5 package as distributed by Ubuntu.
See How to fix? for Ubuntu:16.04 relevant fixed versions and status.
There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2021-3733
- https://bugs.python.org/issue43075
- https://bugzilla.redhat.com/show_bug.cgi?id=1995234
- https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb
- https://github.com/python/cpython/pull/24391
- https://security.netapp.com/advisory/ntap-20220407-0001/
- https://ubuntu.com/security/CVE-2021-3733
- https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html
- https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html