thttpd/cgi-src/phf.c

/* phf - cracker trap
**
** Old distributions of the NCSA and Apache web servers included a
** version of the phf program that had a bug.  The program could
** easily be made to run arbitrary shell commands.  There is no real
** legitimate use for phf, so any attempts to run it must be considered
** to be attacks.  Accordingly, this version of phf logs the attack
** and then returns a page indicating that phf doesn't exist.
**
**
** Copyright © 1996 by Jef Poskanzer <jef@acme.com>.
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
** 1. Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
** ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
** SUCH DAMAGE.
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>

#include "config.h"

static char* argv0;

int
main( int argc, char* argv[] )
    {
    char* cp;

    argv0 = argv[0];
    cp = strrchr( argv0, '/' );
    if ( cp != (char*) 0 )
        ++cp;
    else
        cp = argv0;
    openlog( cp, LOG_NDELAY|LOG_PID, LOG_FACILITY );
    syslog( LOG_CRIT, "phf CGI probe from %s", getenv( "REMOTE_ADDR" ) );
    (void) printf( "\
Content-type: text/html\n\
Status: 404/html\n\
\n\
<HTML><HEAD><TITLE>404 Not Found</TITLE></HEAD>\n\
<BODY><H2>404 Not Found</H2>\n\
The requested object does not exist on this server.\n\
The link you followed is either outdated, inaccurate,\n\
or the server has been instructed not to let you have it.\n\
</BODY></HTML>\n" );
    exit( 0 );
    }
Revision:	1.1
Committed:	Mon Jun 18 21:11:57 2001 UTC (25 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	mp_j, dp_j, cp_j, HEAD
Branch point for:	connpatch, dirpatch, mmapppatch
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	/* phf - cracker trap
2			**
3			** Old distributions of the NCSA and Apache web servers included a
4			** version of the phf program that had a bug. The program could
5			** easily be made to run arbitrary shell commands. There is no real
6			** legitimate use for phf, so any attempts to run it must be considered
7			** to be attacks. Accordingly, this version of phf logs the attack
8			** and then returns a page indicating that phf doesn't exist.
9			**
10			**
11			** Copyright © 1996 by Jef Poskanzer <jef@acme.com>.
12			** All rights reserved.
13			**
14			** Redistribution and use in source and binary forms, with or without
15			** modification, are permitted provided that the following conditions
16			** are met:
17			** 1. Redistributions of source code must retain the above copyright
18			** notice, this list of conditions and the following disclaimer.
19			** 2. Redistributions in binary form must reproduce the above copyright
20			** notice, this list of conditions and the following disclaimer in the
21			** documentation and/or other materials provided with the distribution.
22			**
23			** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24			** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25			** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26			** ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27			** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28			** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29			** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30			** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31			** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32			** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33			** SUCH DAMAGE.
34			*/
35
36			#include <stdio.h>
37			#include <stdlib.h>
38			#include <string.h>
39			#include <syslog.h>
40
41			#include "config.h"
42
43			static char* argv0;
44
45			int
46			main( int argc, char* argv[] )
47			{
48			char* cp;
49
50			argv0 = argv[0];
51			cp = strrchr( argv0, '/' );
52			if ( cp != (char*) 0 )
53			++cp;
54			else
55			cp = argv0;
56			openlog( cp, LOG_NDELAY\|LOG_PID, LOG_FACILITY );
57			syslog( LOG_CRIT, "phf CGI probe from %s", getenv( "REMOTE_ADDR" ) );
58			(void) printf( "\
59			Content-type: text/html\n\
60			Status: 404/html\n\
61			\n\
62			<HTML><HEAD><TITLE>404 Not Found</TITLE></HEAD>\n\
63			<BODY><H2>404 Not Found</H2>\n\
64			The requested object does not exist on this server.\n\
65			The link you followed is either outdated, inaccurate,\n\
66			or the server has been instructed not to let you have it.\n\
67			</BODY></HTML>\n" );
68			exit( 0 );
69			}