GHSA-9298-4cf8-g4wj

Source

https://github.com/advisories/GHSA-9298-4cf8-g4wj

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/10/GHSA-9298-4cf8-g4wj/GHSA-9298-4cf8-g4wj.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-9298-4cf8-g4wj

Aliases

CVE-2024-49768

Published

2024-10-29T14:45:03Z

Modified

2024-10-29T20:09:06.031135Z

Severity

9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

Waitress has request processing race condition in HTTP pipelining with invalid first request

Details

Impact

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.

Patches

Waitress 3.0.1 fixes the race condition.

Workarounds

Disable channel_request_lookahead, this is set to 0 by default disabling this feature. For this vulnerability this value is required to be changed from the default.

For more information

If you have any questions or comments about this advisory: * Open an issue in https://github.com/Pylons/waitress/issues (if not sensitive or security related) * email the Pylons Security mailing list: pylons-project-security@googlegroups.com (if security related)

Thanks

m4yfly and urn1ce From TianGong Team of Legendsec at Qi'anxin Group.

Database specific

{
    "nvd_published_at": "2024-10-29T15:15:11Z",
    "cwe_ids": [
        "CWE-367",
        "CWE-444"
    ],
    "severity": "CRITICAL",
    "github_reviewed": true,
    "github_reviewed_at": "2024-10-29T14:45:03Z"
}

References

Affected packages

PyPI / waitress

Package

Name: waitress; View open source insights on deps.dev
Purl: pkg:pypi/waitress

Affected ranges

Type: ECOSYSTEM
Events: Introduced

2.0.0

Fixed

3.0.1

Affected versions

2.*

2.0.0

2.1.0b0

2.1.0

2.1.1

2.1.2

3.*

3.0.0