REDHAT-BUG-2322461: Race Condition
First published: Tue Oct 29 2024(Updated: )
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 Software | Affected Version | How to fix |
|---|---|---|
| Waitress | <3.0.1 |
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Reference Links
- 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://access.redhat.com/errata/RHSA-2024:10145
- https://access.redhat.com/errata/RHSA-2024:10535
- https://access.redhat.com/errata/RHSA-2024:10815
- https://access.redhat.com/errata/RHSA-2025:0201
- https://access.redhat.com/errata/RHSA-2025:1191
- https://access.redhat.com/errata/RHSA-2025:1192
- https://bugzilla.redhat.com/show_bug.cgi?id=2322461
Frequently Asked Questions
What is the severity of REDHAT-BUG-2322461?
The severity of REDHAT-BUG-2322461 is classified as moderate.
How do I fix REDHAT-BUG-2322461?
To fix REDHAT-BUG-2322461, update Waitress to version 3.0.1 or later.
Which versions of Waitress are affected by REDHAT-BUG-2322461?
All versions of Waitress prior to 3.0.1 are affected by REDHAT-BUG-2322461.
What is the impact of REDHAT-BUG-2322461 on Waitress?
REDHAT-BUG-2322461 can cause Waitress to attempt writing to a socket that no longer exists, leading to potential application instability.
Is there a workaround for REDHAT-BUG-2322461?
There is no known workaround for REDHAT-BUG-2322461; upgrading to the fixed version is recommended.
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