Vulnerabilities > CVE-2024-49769 - Unspecified vulnerability in Agendaless Waitress
Summary
Waitress is a Web Server Gateway Interface server for Python 2 and 3. When a remote client closes the connection before waitress has had the opportunity to call getpeername() waitress won't correctly clean up the connection leading to the main thread attempting to write to a socket that no longer exists, but not removing it from the list of sockets to attempt to process. This leads to a busy-loop calling the write function. A remote attacker could run waitress out of available sockets with very little resources required. Waitress 3.0.1 contains fixes that remove the race condition.
Vulnerable Configurations
References
- https://github.com/Pylons/waitress/commit/1ae4e894c9f76543bee06584001583fc6fa8c95c
- https://github.com/Pylons/waitress/issues/418
- https://github.com/Pylons/waitress/pull/435
- https://github.com/Pylons/waitress/security/advisories/GHSA-3f84-rpwh-47g6
- https://lists.debian.org/debian-lts-announce/2024/11/msg00012.html