CVE-2024-49769 – waitress

Package

Manager: pip
Name: waitress
Vulnerable Version: >=0 <3.0.1

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS: 0.00369 pctl0.57972

Details

Waitress vulnerable to DoS leading to high CPU usage/resource exhaustion ### Impact 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. ### Patches Waitress 3.0.1 contains fixes that remove the race condition. ### Workarounds No work-around. ### References - https://github.com/Pylons/waitress/issues/418 - https://github.com/Pylons/waitress/pull/435

Metadata

Created: 2024-10-29T14:33:00Z
Modified: 2025-01-21T17:53:27Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/10/GHSA-3f84-rpwh-47g6/GHSA-3f84-rpwh-47g6.json
CWE IDs: ["CWE-772"]
Alternative ID: GHSA-3f84-rpwh-47g6
Finding: F067
Auto approve: 1