Apache HTTP Server 2.4.16 release fixes the following issue:
) SECURITY: CVE-2015-3185 (cve.mitre.org) Replacement of apsomeauthrequired (unusable in Apache httpd 2.4) with new apsomeauthnrequired and apforceauthn hook. [Ben Reser]
External References:
http://httpd.apache.org/security/vulnerabilities24.html#2.4.16