CGI-WRAPPER(1)CGI-WRAPPER(1)NAMEcgi-wrapper - run CGI programs in a secured environment
DESCRIPTION
The CGI-wrapper can be used to run certain CGI programs with a differ‐
ent userid then the webserver's userid. To function properly, the CGI-
wrapper binary needs the su-bit. To prevent abuse, it has the necessary
security checks. The CGI-wrapper can only be executed by the Hiawatha
webserver. It uses the Hiawatha PID-file for this verification.
CONFIGURATION
The CGI-wrapper can be configured via the configuration file
/usr/local/etc/hiawatha/cgi-wrapper.conf. The following options are
available:
CGIhandler = <CGI handler>[, <CGI handler>, ...]
Normally, only files inside the WebsiteRoot will be executed.
CGI-handlers are usually not inside this directory. Use this
option to specify binaries that are outside the WebsiteRoot and
the CGI-wrapper is still allowed to execute.
Example: CGIhandler = /usr/local/bin/php4-cgi
Wrap = <wrap_id>;<path>|~<username>;<userid>[:<groupid>[, <groupid>,
...]]
Via a Wrap-entry, you can control the CGI-wrapper. The <wrap_id>
is used to 'bind' it to a virtual host. See CGIwrapId in
hiawatha(1) for more information.
The second option specifies the rootdirectory of the CGI pro‐
gram: it must be located with in this directory or a subdirec‐
tory. Specifiy a complete path or use the homedirectory of a
user + "/public_html/" by specifing it's username preceded by a
'~'. In case of a complete path, it's advisable to use the Web‐
siteRoot of the associated virtual host. When you specify a com‐
plete path, you can replace one slash by a pipe-sign. The part
before the pipe-sign will be used for chroot. Be carefull with
using chrooted CGI's in combination with UserWebsite and Alias
(see hiawatha(1) for more information about these options).
The last options are userid and groupid of the CGI process. If
the groupid is omitted, it will be looked up in /etc/passwd and
/etc/group. The userid and groupid 'root' are not allowed here.
Example: Wrap = test;/var/www/testsite;testuser
Wrap = jail;/usr/local/jail|sites/public;1001:101
The CGI-wrapper needs Hiawatha's pidfile to work.
Using "CGIwrapId = some_id" and "Wrap = some_id;~hugo;hugo" is
the same as using "CGIwrapId = ~hugo".
Most of the parameters in cgi-wrapper.conf are already present in
hiawatha.conf. The reason why they have to be specified again and why
they are not being passed on by Hiawatha, is that when Hiawatha has a
vulnerability, because of a bug in an external library of course :),
the CGI-wrapper can't be used to execute every program on the disk. So
it is done for a security reason.
SEE ALSO
The CGI-wrapper is part of the Hiawatha webserver. See hiawatha(1) for
more information about Hiawatha.
AUTHOR
Hugo Leisink <hugo@hiawatha-webserver.org> - http://www.hiawatha-web‐
server.org/
CGI-WRAPPER(1)
