CVE-2024-49768

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.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/Pylons/waitress/commit/e4359018537af376cf24bd13616d861e2fb76f65	Patch
https://github.com/Pylons/waitress/security/advisories/GHSA-9298-4cf8-g4wj	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:agendaless:waitress:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2024-10-29 15:15

Updated : 2024-11-07 17:28

NVD link : CVE-2024-49768

Mitre link : CVE-2024-49768

CVE.ORG link : CVE-2024-49768

JSON object : View

Products Affected

agendaless

waitress

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

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