Advisory Details

December 4th, 2014

(0Day) 3S Pocketnet Tech VMS PocketNetNVRMediaClientAxCtrl.NVRMediaViewer.1 SetDisplayText Heap Buffer Overflow Remote Code Execution Vulnerability

ZDI-14-396
ZDI-CAN-2408

CVE ID CVE-2014-9263
CVSS SCORE 7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS 3S Pocketnet Tech
AFFECTED PRODUCTS VMS
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 16569. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of 3S Pocketnet Tech VMS. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the PocketNetNVRMediaClientAxCtrl.NVRMediaViewer.1 control. The SetDisplayText method copies an attacker provided string into a fixed size heap buffer. An attacker could leverage this to execute arbitrary code in the context of the browser.

ADDITIONAL DETAILS


This vulnerability is being disclosed publicly without a patch in accordance with the ZDI vulnerability disclosure policy on lack of vendor response.

Vendor Contact Timeline:
08/13/2014 - ZDI emailed the vendor requesting a contact and PGP key
09/04/2014 - ZDI emailed the vendor requesting a contact and PGP key
10/13/2014 - ZDI emailed the vendor requesting a contact and PGP key
11/05/2014 - ZDI emailed ICS-CERT requesting a contact or guidance
11/21/2014 - ZDI emailed ICS-CERT requesting a contact or guidance

-- Mitigation:
The killbit can be set on this control to disable scripting within Internet Explorer by modifying the data value of the Compatibility Flags DWORD within the following location in the registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\3075736A-FC03-452E-B155-721A1C2E9BCE
If the Compatibility Flags value is set to 0x00000400, the control can no longer be instantiated inside the browser.
For more information, please see: http://support.microsoft.com/kb/240797


DISCLOSURE TIMELINE
  • 2014-08-13 - Case submitted to the ZDI
  • 2014-12-04 - Public release of advisory
CREDIT Carsten Eiram, Risk Based Security
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