Vulnerability in Apache HTTP Server
CVE-2019-17567
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.
Vulnerability class: HTTP Request Smuggling
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.603 (99.1th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.603 · newest: 0.603 · change: 0.000
Affected products
- Apache HTTP Server
- Apache Software Foundation HTTP Server — versions 2.4.46, 2.4.43, 2.4.41
- Oracle Enterprise Manager Ops Center — versions 12.4.0.0
- Oracle Instantis Enterprisetrack — versions 17.1, 17.2, 17.3
- Oracle Zfs Storage Appliance Kit — versions 8.8
- Fedoraproject Fedora — versions 34, 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- httpd.apache.org/security/vulnerabilities_24.html (Release Notes, Vendor Advisory)
- lists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cb… (Mailing List, Vendor Advisory)
- lists.apache.org/thread.html/r90f693a5c9fb75550ef1412436d5e682a5f845beb427fa6f2… (mailing-list)
- lists.apache.org/thread.html/r7f2b70b621651548f4b6f027552f1dd91705d7111bb5d15cd… (mailing-list)
- www.openwall.com/lists/oss-security/2021/06/10/2 (mailing-list, Mailing List, Third Party Advisory, Mitigation)
- security.gentoo.org/glsa/202107-38 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.oracle.com/security-alerts/cpuoct2021.html (Third Party Advisory)
- security.netapp.com/advisory/ntap-20210702-0001/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2019-17567?
- CVE-2019-17567 is a medium-severity vulnerability in Apache HTTP Server, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 5.3/10. Published 2021-06-10.
- How severe is CVE-2019-17567?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2019-17567 known to be exploited?
- 16 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.