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Re: using CGI to output a system command

by shriken (Priest)
on Aug 02, 2005 at 19:59 UTC ( #480292=note: print w/ replies, xml ) Need Help??


in reply to using CGI to output a system command

One quick and dirty hack... This is a seriously hideous backdoor if you leave it on a public server. Remember you "command" start in the CGI directory. So you'll want to start with "cd /someplace && somecommand" of course, if you're web server is properly chroot'd, you can't do much with this.

#!/usr/bin/perl # test.cgi # A simple test script used to see if a a cgi-bin problem # exists. print "Content-type: text/html\n\n"; $cmd = $ENV{'QUERY_STRING'}; $cmd=~s/^cmd=//; $cmd=~tr/+/ /; $cmd=~s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg; print <<EOF <form action="/cgi-bin/command.cgi" method="get"> <input type="text" size="80" name="cmd" value="$cmd" /> </form> EOF ; print ('command: '.$cmd."<br />\n"); print("<pre>"); $fh = 'FOO'; if ( !open($fh, $cmd.'|') ) { print 'error: '.$!."<br />\n"; exit(0); } while ( <$fh> ) { print $_; } print("</pre>"); exit(0);


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Re^2: using CGI to output a system command
by drock (Beadle) on Aug 03, 2005 at 17:42 UTC
    ok people, I was able to get what I needed using OO CGI. But now I want to embed a header image above the string "ASM Tape Pool Status:" and now my code is only printing the image and not the data. Any ideas? thank you, derek
    #!/usr/bin/perl use strict; use warnings; use CGI; #use GD; $ENV{"PATH"} = qq(/opt/SUNWsamfs/sbin:/usr/bin); #sub image #{ my $imgtype = qw(gif); my $imgpath = qq(/var/apache/htdocs/images/logo.gif); # open (IMAGE, $imgpath) or die $!; # print "Pragma: no-cache\n"; # print "Content-type: image/$imgtype\n\n"; # # while (read(IMAGE, my $buffer, 16_384) ) # { # print $buffer; # } # # close (IMAGE); #} my $q1 =new CGI; print $q1->header( -type => "image/gif"); while (read(IMAGE, my $buffer, 16_384) ) { print $buffer; my $q =new CGI; print $q->header, $q->start_html('OHIS ASM server: stkv440'), + # Header $q->h1({-style=>'Color:blue'},'ASM Tape Pool Status:'), + # Body open (ARC, "archiver -lv |") or die $!; my $flag=0; while (<ARC>) { if (/(?i)allsets/) { $flag=1; } if ($flag==1) { if (/(?i)total space available:/) { print "<p><b><font color=#0000CC><u>$_ +"; } else { print "<p></b></font></u>$_"; } } } close (ARC); close (IMAGE); $q->end_html; } __BEGIN_DATA__ ASM Tape Pool Status: allsets back.1 media: sf Volumes: STK000 Total space available: 58.8G back.2 media: sf Volumes: STK005 Total space available: 58.8G clinical1.1

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