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CVE-2024-49769

Publication date 29 October 2024

Last updated 19 November 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
waitress 24.10 oracular
Fixed 3.0.0-1ubuntu0.1
24.04 LTS noble
22.04 LTS jammy
Fixed 1.4.4-1.1ubuntu1.1
20.04 LTS focal
Fixed 1.4.1-1ubuntu0.2
18.04 LTS bionic Ignored fix would unavoidably negatively impact other packages
16.04 LTS xenial Ignored fix would unavoidably negatively impact other packages

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Notes

hlibk

On bionic and earlier, asyncore was not bundled within waitress. Fixing these versions could break other packages that rely on asyncore.

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H