VULNERABILITY INTELLIGENCE
CVE-2019-0197
CVSS score4.2 MEDIUM
EPSS probability8.59%
CISA KEVNot currently listed
Published2019-06-11
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
Description
A vulnerability was found in Apache HTTP Server 2.4.34 to 2.4.38. When HTTP/2 was enabled for a http: host or H2Upgrade was enabled for h2 on a https: host, an Upgrade request from http/1.1 to http/2 that was not the first request on a connection could lead to a misconfiguration and crash. Server that never enabled the h2 protocol or that only enabled it for https: and did not set "H2Upgrade on" are unaffected by this issue.
Weakness classification
- CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Primary references
- security@apache.org — Mailing List, Patch, Third Party Advisory
- security@apache.org — Mailing List, Patch, Third Party Advisory
- security@apache.org — Mailing List, Patch, Third Party Advisory
- security@apache.org — Mailing List, Third Party Advisory
- security@apache.org — Third Party Advisory, VDB Entry
- security@apache.org — Third Party Advisory
- security@apache.org — Third Party Advisory
- security@apache.org — Third Party Advisory
- security@apache.org — Vendor Advisory
- security@apache.org
- security@apache.org
- security@apache.org