CVE - CVE-2022-24761

CVE-ID
CVE-2022-24761	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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 advisory: The use of Python's `int()` to parse strings into integers, leading to `+10` to be parsed as `10`, or `0x01` to be parsed as `1`, where as the standard specifies that the string should contain only digits or hex digits; and Waitress does not support chunk extensions, however it was discarding them without validating that they did not contain illegal characters. This vulnerability has been patched in Waitress 2.1.1. A workaround is available. When deploying a proxy in front of waitress, turning on any and all functionality to make sure that the request matches the RFC7230 standard. Certain proxy servers may not have this functionality though and users are encouraged to upgrade to the latest version of waitress instead.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36 URL:https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36 DEBIAN:DSA-5138 URL:https://www.debian.org/security/2022/dsa-5138 MISC:https://github.com/Pylons/waitress/commit/9e0b8c801e4d505c2ffc91b891af4ba48af715e0 URL:https://github.com/Pylons/waitress/commit/9e0b8c801e4d505c2ffc91b891af4ba48af715e0 MISC:https://github.com/Pylons/waitress/releases/tag/v2.1.1 URL:https://github.com/Pylons/waitress/releases/tag/v2.1.1 MLIST:[debian-lts-announce] 20220512 [SECURITY] [DLA 3000-1] waitress security update URL:https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20220210	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20220210)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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