TippingPoint Zero Day Initiative

Adobe Digital Editions ePub Font Parsing Use-After-Free Remote Code Execution Vulnerability

ZDI-17-642: August 9th, 2017


CVSS Score

Affected Vendors

Affected Products

    Digital Editions

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Adobe Digital Editions. 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 parsing of fonts in ePub files. 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 arbitrary code in the context of the current process.

Vendor Response

Adobe has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2016-11-03 - Vulnerability reported to vendor
    2017-08-09 - Coordinated public release of advisory


This vulnerability was discovered by:
    Steven Seeley of Source Incite