Bug 849008 (CVE-2022-31015)

Summary:	<dev-python/waitress-2.1.2: data race leading to early termination
Product:	Gentoo Security	Reporter:	John Helmert III <ajak>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	minor	CC:	python
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://github.com/Pylons/waitress/security/advisories/GHSA-f5x9-8jwc-25rw
Whiteboard:	B3 [noglsa]
Package list:		Runtime testing required:	---
Bug Depends on:	855743
Bug Blocks:

Description John Helmert III archtester

2022-06-01 12:59:55 UTC

CVE-2022-31015:

Waitress is a Web Server Gateway Interface server for Python 2 and 3. Waitress versions 2.1.0 and 2.1.1 may terminate early due to a thread closing a socket while the main thread is about to call select(). This will lead to the main thread raising an exception that is not handled and then causing the entire application to be killed. This issue has been fixed in Waitress 2.1.2 by no longer allowing the WSGI thread to close the socket. Instead, that is always delegated to the main thread. There is no work-around for this issue. However, users using waitress behind a reverse proxy server are less likely to have issues if the reverse proxy always reads the full response.

Comment 1 John Helmert III archtester

2023-01-06 17:21:19 UTC

Low impact, only a complex-to-exploit DoS. No GLSA, all done.