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

Reference ID: SSA-1605
Publication date: 11.10.2016
Severity: critical

Affected products/versions:
Adobe Acrobat Reader DC (15.017.20053 and earlier versions)

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.

References:
ZDI-16-554
CVE-2016-6946
Adobe Security Bulletin APSB16-33