Inconsistent interpretation of HTTP requests in waitress - CVE-2019-16792
Published: August 20, 2023
Vulnerability identifier: #VU79727
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-16792
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.
The vulnerability exists due to improper validation of HTTP requests. A remote attacker can send a specially crafted HTTP request with a double Content-Length header to the server and smuggle arbitrary HTTP headers.
Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.
Affected software
waitress
Fedora
python-waitress
Fedora
python-waitress
How to mitigate CVE-2019-16792
Install updates from vendor's website.
waitress - update to 1.4.0
python-waitress - update to 1.4.3-1.el8
python-waitress - update to 1.4.3-1.el8
External 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://www.oracle.com/security-alerts/cpuapr2022.html
- https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html