CVE-2021-31459
Foxit PDF Reader vulnerability analysis and mitigation

Overview

CVE-2021-31459 is a use-after-free remote code execution vulnerability affecting Foxit Reader version 10.1.1.37576. The vulnerability was discovered and reported to the vendor on March 3rd, 2021, with public disclosure occurring on May 7th, 2021 (ZDI Advisory).

Technical details

The vulnerability exists within the handling of XFA Forms in Foxit Reader. The specific flaw results from the lack of validating the existence of an object prior to performing operations on the object. The vulnerability has been assigned a CVSS score of 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) (ZDI Advisory).

Impact

If successfully exploited, this vulnerability allows remote attackers to execute arbitrary code in the context of the current process on affected installations of Foxit Reader. However, user interaction is required as the target must visit a malicious page or open a malicious file (CVE Mitre).

Mitigation and workarounds

Foxit has issued an update to correct this vulnerability. Users should update to the latest version of Foxit Reader through the official Foxit website (Foxit Security Bulletin).

Additional resources


SourceThis report was generated using AI

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