Description
A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).
Remediation
References
Related Vulnerabilities
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Moodle Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2016-0724)
WordPress Cross-Site Request Forgery (CSRF) Vulnerability (CVE-2017-5489)