Missing Release of Resource after Effective Lifetime Affecting waitress package, versions <3.0.0-1ubuntu0.1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.06% (25th percentile)

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  • Snyk IDSNYK-UBUNTU2410-WAITRESS-8310430
  • published5 Nov 2024
  • disclosed29 Oct 2024

Introduced: 29 Oct 2024

CVE-2024-49769  (opens in a new tab)
CWE-772  (opens in a new tab)

How to fix?

Upgrade Ubuntu:24.10 waitress to version 3.0.0-1ubuntu0.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream waitress package and not the waitress package as distributed by Ubuntu. See How to fix? for Ubuntu:24.10 relevant fixed versions and status.

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.

CVSS Scores

version 3.1