man : suexec2(8)
SUEXEC2(8) suexec2 SUEXEC2(8)
suexec2 - Switch user before executing external programs
suexec2 is used by the Apache HTTP Server to switch to another user
before executing CGI programs. In order to achieve this, it must run as
root. Since the HTTP daemon normally doesn't run as root, the suexec2
executable needs the setuid bit set and must be owned by root. It
should never be writable for any other person than root.
For further information about the concepts and and the security model
of suexec2 please refer to the suexec2 documentation
-V If you are root, this option displays the compile options of
suexec2. For security reasons all configuration options are
changeable only at compile time.
Apache HTTP Server 2005-11-13 1