Advisory Details

November 8th, 2016

Adobe Flash AVSegmentedSource Use-After-Free Remote Code Execution Vulnerability

ZDI-16-596
ZDI-CAN-4015

CVE ID CVE-2016-7857
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 the handling of the AVSegmentedSource class. By performing actions in ActionScript an attacker can cause a pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process.

VENDOR RESPONSE 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
  • 2016-09-06 - Vulnerability reported to vendor
  • 2016-11-08 - Coordinated public release of advisory
CREDIT bo13oy of CloverSec Labs
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