CVE-2024-49769
HIGH7.5EPSS 1.5%waitress - security update
Published: 10/29/2024Modified: 4/28/2026
Description
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.
Affected packages (4)
- Debian/waitressfrom 0, < 1.4.4-1.1+deb11u2
- Debian/waitressfrom 0, < 1.4.4-1.1+deb11u2
- PyPI/waitressfrom 0, < 3.0.1
- PyPI/waitressfrom 0, < 1ae4e894c9f76543bee06584001583fc6fa8c95c | from 0, < 3.0.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (9)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2024-49769
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2024-49769
- PATCHhttps://github.com/Pylons/waitress
- WEBhttps://github.com/Pylons/waitress/commit/1ae4e894c9f76543bee06584001583fc6fa8c95c
- WEBhttps://github.com/Pylons/waitress/issues/418
- WEBhttps://github.com/Pylons/waitress/pull/435
- WEBhttps://github.com/Pylons/waitress/security/advisories/GHSA-3f84-rpwh-47g6
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/waitress/PYSEC-2024-211.yaml
- WEBhttps://lists.debian.org/debian-lts-announce/2024/11/msg00012.html