Ubuntu: USN-7115-1 (CVE-2024-49769): Waitress vulnerabilities

Ubuntu: USN-7115-1 (CVE-2024-49769): Waitress vulnerabilities

Severity

8

CVSS

(AV:N/AC:L/Au:N/C:N/I:N/A:C)

Published

10/29/2024

Created

11/21/2024

Added

11/20/2024

Modified

01/30/2025

Description

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.

Solution(s)

• ubuntu-pro-upgrade-python3-waitress

References

• https://attackerkb.com/topics/cve-2024-49769
• CVE - 2024-49769
• USN-7115-1