SRC-2018-0008 : Adobe Digital Editions ePub otf Font Parsing TableRecord offset Out-of-Bounds Read Information Disclosure Vulnerability

CVE ID:

CVE-2018-4925

CVSS Score:

4.3, (AV:N/AC:M/Au:N/C:P/I:N/A:N)

Affected Vendors:

Adobe

Affected Products:

Adobe Digital Editions

Vulnerability Details:

This vulnerability allows remote attackers to disclose sensitive information 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 ePub files with embedded OTF fonts. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated object. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the current process.

Vendor Response:

Adobe has issued an update to correct these vulnerabilities. More details can be found at:
https://helpx.adobe.com/security/products/Digital-Editions/apsb18-13.html

Disclosure Timeline:

  • 2018-01-23 – Verified and sent to Adobe
  • 2018-04-10 – Coordinated public release of advisory

Proof of Concept:

/pocs/src-2018-0008.epub

Credit:

This vulnerability was discovered by Steven Seeley (mr_me) of Source Incite