Advisory Details

August 4th, 2020

Foxit PhantomPDF SetLocalDescription Use-After-Free Information Disclosure Vulnerability

ZDI-20-932
ZDI-CAN-10972

CVE ID CVE-2020-15637
CVSS SCORE 3.3, (AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N)
AFFECTED VENDORS Foxit
AFFECTED PRODUCTS PhantomPDF
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Foxit PhantomPDF. 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 SetLocalDescription method. By performing actions in JavaScript, an attacker can cause a pointer to be reused after it has been freed. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the current process.

ADDITIONAL DETAILS Foxit has issued an update to correct this vulnerability. More details can be found at:
https://www.foxitsoftware.com/support/security-bulletins.html
DISCLOSURE TIMELINE
  • 2020-04-23 - Vulnerability reported to vendor
  • 2020-08-04 - Coordinated public release of advisory
CREDIT Mat Powell of Trend Micro Zero Day Initiative
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