Advisory Details

November 8th, 2016

Adobe Flash ExternalInterface addCallback Use-After-Free Remote Code Execution Vulnerability

ZDI-16-595
ZDI-CAN-3986

CVE ID CVE-2016-7858
CVSS SCORE 6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS Adobe
AFFECTED PRODUCTS Flash
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Adobe Flash. 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 ExternalInterface's addCallback method. The issue results from the lack of validating the existence of an object prior to performing operations on the object. 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/flash-player/apsb16-37.html
DISCLOSURE TIMELINE
  • 2016-09-08 - Vulnerability reported to vendor
  • 2016-11-08 - Coordinated public release of advisory
CREDIT Kiritou Kureha
BACK TO ADVISORIES