CVE-2024-49769: Waitress has a denial of service leading to high CPU usage/resource exhaustion
First published: Tue Oct 29 2024(Updated: )
### Impact 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. ### Patches Waitress 3.0.1 contains fixes that remove the race condition. ### Workarounds No work-around. ### References - https://github.com/Pylons/waitress/issues/418 - https://github.com/Pylons/waitress/pull/435
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| pip/waitress | <3.0.1 | 3.0.1 |
| Agendaless Waitress | <3.0.1 | |
| debian/waitress | <=1.4.4-1.1+deb11u1<=2.1.2-2 | 1.4.4-1.1+deb11u2 3.0.2-1 |
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Reference Links
- https://github.com/Pylons/waitress/security/advisories/GHSA-3f84-rpwh-47g6
- https://github.com/Pylons/waitress/issues/418
- https://github.com/Pylons/waitress/pull/435
- https://nvd.nist.gov/vuln/detail/CVE-2024-49769
- https://github.com/Pylons/waitress/commit/1ae4e894c9f76543bee06584001583fc6fa8c95c
- https://github.com/advisories/GHSA-3f84-rpwh-47g6 (Advisory)
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-49769
- https://launchpad.net/bugs/cve/CVE-2024-49769
- https://security-tracker.debian.org/tracker/CVE-2024-49769
- https://ubuntu.com/security/CVE-2024-49769
- https://access.redhat.com/errata/RHSA-2024:9613
- https://access.redhat.com/errata/RHSA-2024:9618
- https://access.redhat.com/errata/RHSA-2024:9623
- https://bugzilla.redhat.com/show_bug.cgi?id=2322461
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