Advisory Details

October 6th, 2017

(0Day) Microsoft Windows WAV File Uninitialized Pointer Denial of Service Vulnerability

ZDI-17-838
ZDI-CAN-5130

CVE ID
CVSS SCORE 5, (AV:N/AC:L/Au:N/C:N/I:N/A:P)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 29741. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to cause a denial-of-service condition on vulnerable installations of Microsoft Windows. 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 processing of WAV audio files. The issue results from the lack of proper initialization of a pointer prior to accessing it. An attacker can leverage this vulnerability to create a denial-of-service condition in the context of the Explorer process or other current process.

ADDITIONAL DETAILS


This vulnerability is being disclosed publicly without a patch in accordance with the ZDI 120 day deadline.

09/01/17 - ZDI disclosed the report to the vendor.
09/01/17 - The vendor acknowledged the report and provided a case manager and a tracking number.
09/15/17 - The vendor responded that "We have finished our investigation into this report and determined this does not meet our bar for servicing a downlevel security patch. This requires user interaction to trigger and is not a persistent DOS. Our analysis has determined it does not bugcheck. A blackscreen will show and explorer.exe will restart. Can you confirm your disclosure timeline?"
09/15/17 - ZDI advised the vendor that this report will 0-day on 10/06/17.

-- Mitigation:
Given the nature of the vulnerability the only salient mitigation strategy is to restrict interaction with the application to trusted files.


DISCLOSURE TIMELINE
  • 2017-09-01 - Vulnerability reported to vendor
  • 2017-10-06 - Coordinated public release of advisory
CREDIT Andre Fassbender
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