Advisory Details

May 7th, 2021

Foxit Reader XFA Form Out-Of-Bounds Write Remote Code Execution Vulnerability

CVE ID	CVE-2021-31452
CVSS SCORE	7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Foxit
AFFECTED PRODUCTS	Reader
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader. 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 XFA forms. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability 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.php
DISCLOSURE TIMELINE	2021-03-03 - Vulnerability reported to vendor 2021-05-07 - Coordinated public release of advisory 2021-05-07 - Advisory Updated
CREDIT	Yongil Lee(@intellee) and Wonyoung Jung(@nonetype) of Diffense

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