Vulnerability in Apache Http_server
CVE-2016-4979
The Apache HTTP Server 2.4.18 through 2.4.20, when mod_http2 and mod_ssl are enabled, does not properly recognize the "SSLVerifyClient require" directive for HTTP/2 request authorization, which allows remote attackers to bypass intended ac…
EPSS: 0.174 (95.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Apache Http_server — versions 2.4.18, 2.4.19, 2.4.20
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- RHSA-2016:1420 (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- GLSA-201610-02 (vendor-advisory, x_refsource_GENTOO)
- 20160706 CVE-2016-4979: HTTPD webserver - X509 Client certificate based authentication can be bypassed when HTTP/2 is used [vs] (mailing-list, x_refsource_FULLDISC)
- secalert@redhat.com (x_refsource_CONFIRM)
- secalert@redhat.com (x_refsource_CONFIRM)
- 91566 (vdb-entry, x_refsource_BID)
- secalert@redhat.com (x_refsource_CONFIRM)
- 1036225 (vdb-entry, x_refsource_SECTRACK)
- [oss-security] 20160705 CVE-2016-4979: HTTPD webserver - X509 Client certificate based authentication can be bypassed when HTTP/2 is used [vs] (mailing-list, x_refsource_MLIST)
Frequently asked questions
- What is CVE-2016-4979?
- CVE-2016-4979 is a high-severity vulnerability in Apache Http_server, classified under Improper Access Control. CVSS score: 7.5/10. Published 2016-07-06.
- How severe is CVE-2016-4979?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-4979 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.