Advisory Details

October 11th, 2016

Adobe Reader DC XFA maxChars Use-After-Free Remote Code Execution Vulnerability

ZDI-16-554
ZDI-CAN-3845

CVE ID CVE-2016-6946
CVSS SCORE 6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS Adobe
AFFECTED PRODUCTS Acrobat Reader DC
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['34148']. 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 Adobe Reader DC. 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 handling of XFA maxChars. The issue lies in the failure to properly validate the existence of an object prior to performing operations on it. An attacker can leverage this vulnerability to execute code under the context of the current process.
ADDITIONAL DETAILS Adobe has issued an update to correct this vulnerability. More details can be found at:
https://helpx.adobe.com/security/products/acrobat/apsb16-33.html
DISCLOSURE TIMELINE
  • 2016-06-30 - Vulnerability reported to vendor
  • 2016-10-11 - Coordinated public release of advisory
CREDIT Sebastian Apelt
siberas
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