VULNERABILITY INTELLIGENCE
CVE-2019-17567
CVSS score5.3 MEDIUM
EPSS probability60.27%
CISA KEVNot currently listed
Published2021-06-10
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Description
Apache HTTP Server versions 2.4.6 to 2.4.46 mod_proxy_wstunnel configured on an URL that is not necessarily Upgraded by the origin server was tunneling the whole connection regardless, thus allowing for subsequent requests on the same connection to pass through with no HTTP validation, authentication or authorization possibly configured.
Weakness classification
- CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Primary references
- security@apache.org — Release Notes, Vendor Advisory
- security@apache.org — Mailing List, Mitigation, Third Party Advisory
- security@apache.org
- security@apache.org
- security@apache.org — Mailing List, Vendor Advisory
- security@apache.org
- security@apache.org
- security@apache.org
- security@apache.org — Third Party Advisory
- security@apache.org — Third Party Advisory
- security@apache.org — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory