CVE-2019-16792
Waitress through version 1.3.1 allows request smuggling by sending the Content-Length header twice.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.98%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 1.98% probability · 79th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-444
- Affected
- agendaless/waitress · oracle/communications cloud native core network function cloud native environment · debian/debian linux
- Source
- security-advisories@github.com
References
- https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixesRelease Notes
- https://github.com/Pylons/waitress/commit/575994cd42e83fd772a5f7ec98b2c56751bd3f65Patch
- https://github.com/Pylons/waitress/security/advisories/GHSA-4ppp-gpcr-7qf6Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/05/msg00011.htmlMailing List, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixesRelease Notes
- https://github.com/Pylons/waitress/commit/575994cd42e83fd772a5f7ec98b2c56751bd3f65Patch
- https://github.com/Pylons/waitress/security/advisories/GHSA-4ppp-gpcr-7qf6Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/05/msg00011.htmlMailing List, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.