Waitress is a Web Server Gateway Interface server for Python 2 and 3. A remote client may send a request that is exactly recv_bytes (defaults to 8192) long, followed by a secondary request using HTTP pipelining. When request lookahead is disabled (default) we won't read any more requests, and when the first request fails due to a parsing error, we simply close the connection. However when request lookahead is enabled, it is possible to process and receive the first request, start sending the error message back to the client while we read the next request and queue it. This will allow the secondary request to be serviced by the worker thread while the connection should be closed. Waitress 3.0.1 fixes the race condition. As a workaround, disable channel_request_lookahead, this is set to 0 by default disabling this feature.
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History
Wed, 30 Oct 2024 02:00:00 +0000
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Pylons waitress |
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CPEs | cpe:2.3:a:pylons:waitress:*:*:*:*:*:*:*:* | |
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Pylons waitress |
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Description | Waitress is a Web Server Gateway Interface server for Python 2 and 3. A remote client may send a request that is exactly recv_bytes (defaults to 8192) long, followed by a secondary request using HTTP pipelining. When request lookahead is disabled (default) we won't read any more requests, and when the first request fails due to a parsing error, we simply close the connection. However when request lookahead is enabled, it is possible to process and receive the first request, start sending the error message back to the client while we read the next request and queue it. This will allow the secondary request to be serviced by the worker thread while the connection should be closed. Waitress 3.0.1 fixes the race condition. As a workaround, disable channel_request_lookahead, this is set to 0 by default disabling this feature. | |
Title | Waitress has request processing race condition in HTTP pipelining with invalid first request | |
Weaknesses | CWE-367 CWE-444 |
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cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2024-10-29T14:32:25.164Z
Updated: 2024-10-29T14:56:02.111Z
Reserved: 2024-10-18T13:43:23.457Z
Link: CVE-2024-49768
Vulnrichment
Updated: 2024-10-29T14:55:55.365Z
NVD
Status : Awaiting Analysis
Published: 2024-10-29T15:15:11.440
Modified: 2024-11-01T12:57:35.843
Link: CVE-2024-49768
Redhat