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Bug 849008 (CVE-2022-31015) - <dev-python/waitress-2.1.2: data race leading to early termination
Summary: <dev-python/waitress-2.1.2: data race leading to early termination
Alias: CVE-2022-31015
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
Whiteboard: B3 [noglsa]
Depends on: 855743
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Reported: 2022-06-01 12:59 UTC by John Helmert III
Modified: 2023-01-06 17:21 UTC (History)
1 user (show)

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Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-06-01 12:59:55 UTC

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 Gentoo Infrastructure gentoo-dev Security 2023-01-06 17:21:19 UTC
Low impact, only a complex-to-exploit DoS. No GLSA, all done.