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Vulnerability Details : 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 access restrictions by leveraging the ability to send multiple requests over a single connection and aborting a renegotiation.
Publish Date : 2016-07-06 Last Update Date : 2018-06-02
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 284

- Products Affected By CVE-2016-4979

# Product Type Vendor Product Version Update Edition Language
1 Application Apache Http Server 2.4.18 Version Details Vulnerabilities
2 Application Apache Http Server 2.4.19 Version Details Vulnerabilities
3 Application Apache Http Server 2.4.20 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Apache Http Server 3

- References For CVE-2016-4979

http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html CONFIRM
http://www.securityfocus.com/bid/91566
BID 91566 Apache HTTP Server CVE-2016-4979 Authentication Bypass Vulnerability Release Date:2016-10-20
http://www.securitytracker.com/id/1036225
SECTRACK 1036225
https://access.redhat.com/errata/RHSA-2016:1420
REDHAT RHSA-2016:1420
https://github.com/apache/httpd/commit/2d0e4eff04ea963128a41faaef21f987272e05a2 CONFIRM
https://security.netapp.com/advisory/ntap-20180601-0001/ CONFIRM
http://seclists.org/fulldisclosure/2016/Jul/11
FULLDISC 20160706 CVE-2016-4979: HTTPD webserver - X509 Client certificate based authentication can be bypassed when HTTP/2 is used [vs]
http://www.apache.org/dist/httpd/CHANGES_2.4 CONFIRM
http://www.openwall.com/lists/oss-security/2016/07/05/5
MLIST [oss-security] 20160705 CVE-2016-4979: HTTPD webserver - X509 Client certificate based authentication can be bypassed when HTTP/2 is used [vs]
https://security.gentoo.org/glsa/201610-02
GENTOO GLSA-201610-02
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html CONFIRM
http://httpd.apache.org/security/vulnerabilities_24.html CONFIRM
http://packetstormsecurity.com/files/137771/Apache-2.4.20-X509-Authentication-Bypass.html

- Metasploit Modules Related To CVE-2016-4979

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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