Adobe Reader DC JavaScript AnnotsString Object Arbitrary Overwrite Restrictions Bypass Vulnerability

ID ZDI-18-1417
Type zdi
Reporter Abdul-Aziz Hariri of Trend Micro Zero Day Initiative
Modified 2018-06-22T00:00:00


This vulnerability allows remote attackers to bypass API restrictions 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 AnnotsString object. By creating a specially crafted PDF with specific JavaScript instructions, it is possible to overwrite the object's properties and methods. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the current process.