Advisory Details

February 12th, 2019

Adobe Reader DC Name Squatting JavaScript Restrictions Bypass Vulnerability

ZDI-19-202
ZDI-CAN-7334

CVE ID CVE-2019-7041
CVSS SCORE 2.7, (AV:L/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N)
AFFECTED VENDORS Adobe
AFFECTED PRODUCTS Acrobat Reader DC
VULNERABILITY DETAILS

This vulnerability allows remote attackers to bypass JavaScript API restrictions 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 due to a mispelled API in the built-in encoded JavaScript scripts. By creating a specially crafted PDF with specific JavaScript instructions, it is possible to bypass the Javascript API restrictions. An attacker can leverage this in conjunction with other vulnerabilities to execute code in 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/apsb19-07.html
DISCLOSURE TIMELINE
  • 2018-10-04 - Vulnerability reported to vendor
  • 2019-02-12 - Coordinated public release of advisory
CREDIT Abdul-Aziz Hariri and Jasiel Spelman of Trend Micro Zero Day Initiative
BACK TO ADVISORIES