CVSS: 9.1EPSS: 0%CPEs: 1EXPL: 0CVE-2024-49768 – Waitress has request processing race condition in HTTP pipelining with invalid first request
https://notcve.org/view.php?id=CVE-2024-49768
29 Oct 2024 — 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 b... • https://github.com/Pylons/waitress/commit/e4359018537af376cf24bd13616d861e2fb76f65 • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') •
CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0CVE-2024-49769 – Waitress has a denial of service leading to high CPU usage/resource exhaustion
https://notcve.org/view.php?id=CVE-2024-49769
29 Oct 2024 — 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 resou... • https://github.com/Pylons/waitress/commit/1ae4e894c9f76543bee06584001583fc6fa8c95c • CWE-772: Missing Release of Resource after Effective Lifetime •
CVSS: 6.5EPSS: 0%CPEs: 1EXPL: 1CVE-2022-31015 – Uncaught Exception (due to a data race) leads to process termination in Waitress
https://notcve.org/view.php?id=CVE-2022-31015
31 May 2022 — Waitress is a Web Server Gateway Interface server for Python 2 and 3. Waitress versions 2.1.0 and 2.1.1 may terminate early due to a thread closing a socket while the main thread is about to call select(). This will lead to the main thread raising an exception that is not handled and then causing the entire application to be killed. This issue has been fixed in Waitress 2.1.2 by no longer allowing the WSGI thread to close the socket. Instead, that is always delegated to the main thread. • https://github.com/Pylons/waitress/commit/4f6789b035610e0552738cdc4b35ca809a592d48 • CWE-248: Uncaught Exception CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 7.5EPSS: 0%CPEs: 2EXPL: 0CVE-2022-24761 – HTTP Request Smuggling in waitress
https://notcve.org/view.php?id=CVE-2022-24761
17 Mar 2022 — Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using Waitress versions 2.1.0 and prior behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends. This would allow requests to be smuggled via the front-end proxy to waitress and later behavior. There are two classes of vulnerability that may lead to request smuggling that are addressed by this advi... • https://github.com/Pylons/waitress/commit/9e0b8c801e4d505c2ffc91b891af4ba48af715e0 • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') •