Vulnerability in Agendaless Waitress
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.015 (72.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Agendaless Waitress
- Pylons Waitress — versions >= 2.1.0, < 2.1.2
Weakness classification (CWE)
References
- github.com/Pylons/waitress/security/advisories/GHSA-f5x9-8jwc-25rw (Third Party Advisory)
- github.com/Pylons/waitress/issues/374 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- github.com/Pylons/waitress/pull/377 (Patch, Third Party Advisory, Issue Tracking)
- github.com/Pylons/waitress/commit/4f6789b035610e0552738cdc4b35ca809a592d48 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-31015?
- CVE-2022-31015 is a medium-severity vulnerability in Agendaless Waitress, classified under CWE-248. CVSS score: 6.5/10. Published 2022-05-31.
- How severe is CVE-2022-31015?
- Medium severity. CVSS v3 base score is 6.5 out of 10.