-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
(0Day) Microsoft Windows WAV File Uninitialized Pointer
Denial of Service
9 October 2017
AusCERT Security Bulletin Summary
Publisher: Zero Day Initiative
Operating System: Windows
Impact/Access: Denial of Service -- Remote with User Interaction
- --------------------------BEGIN INCLUDED TEXT--------------------
(0Day) Microsoft Windows WAV File Uninitialized Pointer Denial of Service
ZDI-17-838: October 6th, 2017
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.
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
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.
2017-09-01 - Vulnerability reported to vendor
2017-10-06 - Coordinated public release of advisory
This vulnerability was discovered by:
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to email@example.com
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: firstname.lastname@example.org
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
-----BEGIN PGP SIGNATURE-----
-----END PGP SIGNATURE-----