Adobe Reader Graphics State Parameter Dictionary Double Free Remote Code Execution Vulnerability

January 12th, 2016
ZDI-16-017 ZDI-CAN-3273

CVE ID

CVE-2016-0935

CVSS Score

6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected Vendors

Adobe

Affected Products

Reader

Vulnerability Details


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Adobe Reader. 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 ExtGState dictionary within PDFs. The issue lies in the processing of malformed dictionaries leading to a double free. An attacker could leverage this vulnerability to execute arbitrary 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/apsb16-02.html

Disclosure Timeline

  • 2015-09-03 - Vulnerability reported to vendor
  • 2016-01-12 - Coordinated public release of advisory

Credit

kdot

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