CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NCVE-2019-16792
Waitress through version 1.3.1 allows request smuggling by sending the Content-Length header twice. Waitress would header fold a double Content-Length header and due to being unable to cast the now comma separated value to an integer would set the Content-Length to 0 internally. If two Content-Length headers are sent in a single request, Waitress would treat the request as having no body, thereby treating the body of the request as a new request in HTTP pipelining. This issue is fixed in Waitress 1.4.0.
Severity
- EPSS
- 2.0% chance of exploitation in the next 30 days; higher than 80% of CVEs (scores of 2026-10-31)
- CWE
- CWE-444
- Published
- Modified
- Record from
- the NVD, synced
Affected
- agendaless:waitress
- debian:debian_linux
- oracle:communications_cloud_native_core_network_function_cloud_native_environment
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-4ppp-gpcr-7qf6 | PyPI | waitress | <1.4.0 | 1.4.0 |
| PYSEC-2020-178 | PyPI | waitress | <1.4.0 | 1.4.0 |
References
- https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes
- https://github.com/Pylons/waitress/commit/575994cd42e83fd772a5f7ec98b2c56751bd3f65
- https://github.com/Pylons/waitress/security/advisories/GHSA-4ppp-gpcr-7qf6
- https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html
- https://www.oracle.com/security-alerts/cpuapr2022.html