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.

The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-7115-1 advisory.

    It was discovered that Waitress could process follow up requests when receiving a specially crafted     message. An attacker could use this issue to have the server process inconsistent client requests. This     issue only affected Ubuntu 24.04 LTS and Ubuntu 24.10. (CVE-2024-49768)

    Dylan Jay discovered that Waitress could be lead to write to an unexisting socket after closing the remote     connection. An attacker could use this issue to increase resource utilization leading to a denial of     service. (CVE-2024-49769)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2024-157678aad0 advisory.

    Update to version 3.0.1, which resolves CVE-2024-49768 and CVE-2024-49769.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:3876-1 advisory.

    - CVE-2024-49768: Fixed request processing race condition in HTTP pipelining with invalid first request     when lookahead is enabled (bsc#1232556)
    - CVE-2024-49769: Fixed incorrect connection clean up leads to a busy-loop and resource exhaustion     (bsc#1232554)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
211585	Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : Waitress vulnerabilities (USN-7115-1)	Nessus	Ubuntu Local Security Checks	medium
211480	Fedora 41 : python-waitress (2024-157678aad0)	Nessus	Fedora Local Security Checks	medium
210119	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : python-waitress (SUSE-SU-2024:3876-1)	Nessus	SuSE Local Security Checks	medium

Detections

Analytics

CVE-2024-49768

medium

Tenable Plugins

medium

medium

medium