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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PHP Permissions, Privileges, and Access Controls Vulnerability (CVE-2008-5625)
WordPress Plugin Clio Grow Cross-Site Scripting (1.0)
PHP Other Vulnerability (CVE-2007-1399)
MySQL Deserialization of Untrusted Data Vulnerability (CVE-2019-14540)