CVE-2022-31015
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 2.1.2-1 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 2.1.2-1 |
| debian | sid | fixed | 2.1.2-1 |
| debian | trixie | fixed | 2.1.2-1 |
References
- https://github.com/Pylons/waitress/security/advisories/GHSA-f5x9-8jwc-25rw
- https://nvd.nist.gov/vuln/detail/CVE-2022-31015
- https://github.com/Pylons/waitress/issues/374
- https://github.com/Pylons/waitress/pull/377
- https://github.com/Pylons/waitress/commit/4f6789b035610e0552738cdc4b35ca809a592d48
- https://github.com/Pylons/waitress
- https://github.com/pypa/advisory-database/tree/main/vulns/waitress/PYSEC-2022-205.yaml
- https://www.suse.com/security/cve/CVE-2022-31015.html
- https://security-tracker.debian.org/tracker/CVE-2022-31015
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.