Advisory Details

August 19th, 2019

Adobe Acrobat Pro DC AcroForm textSize Property Use-After-Free Remote Code Execution Vulnerability

ZDI-19-759
ZDI-CAN-8798

CVE ID CVE-2019-8057
CVSS SCORE 7.8, (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Adobe
AFFECTED PRODUCTS Acrobat Pro DC
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected 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 the textSize property of Field objects in the AcroForm plugin. 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 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/apsb19-41.html
DISCLOSURE TIMELINE
  • 2019-06-27 - Vulnerability reported to vendor
  • 2019-08-19 - Coordinated public release of advisory
CREDIT Mat Powell of Trend Micro Zero Day Initiative
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