Adobe Acrobat Pro DC Onix FileClassT Use-After-Free Remote Code Execution Vulnerability

December 12th, 2018
ZDI-18-1370 ZDI-CAN-6900

CVE ID

CVE-2018-16046

CVSS Score

5.2 AV:L/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L

Affected Vendors

Adobe

Affected Products

Acrobat Pro DC

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Adobe Acrobat Pro 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 FileClassT objects. By manipulating a document's elements an attacker can cause a pointer to be reused after it has been freed. An attacker can leverage this vulnerability 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/apsb18-41.html

Disclosure Timeline

  • 2018-07-22 - Vulnerability reported to vendor
  • 2018-12-12 - Coordinated public release of advisory

Credit

Sebastian Apelt (@bitshifter123)

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