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Red Hat OpenShift: CVE-2024-49769: waitress: Waitress has a denial of service leading to high CPU usage/resource exhaustion

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Red Hat OpenShift: CVE-2024-49769: waitress: Waitress has a denial of service leading to high CPU usage/resource exhaustion

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
10/29/2024
Created
11/26/2024
Added
11/25/2024
Modified
02/11/2025

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)

  • linuxrpm-upgrade-python-waitress

References

  • https://attackerkb.com/topics/cve-2024-49769
  • CVE - 2024-49769
  • RHSA-2024:10145
  • RHSA-2024:10535
  • RHSA-2024:10815
  • RHSA-2024:9613
  • RHSA-2024:9618
  • RHSA-2024:9623
  • RHSA-2025:0201
  • RHSA-2025:1191
  • RHSA-2025:1192
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