CVE-2021-21870: Use After Free
First published: Thu Aug 05 2021(Updated: )
A use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader, version 10.1.4.37651. A specially crafted PDF document can trigger the reuse of previously free memory, which can lead to arbitrary code execution. An attacker needs to trick the user into opening a malicious file or site to trigger this vulnerability if the browser plugin extension is enabled.
Credit: talos-cna@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Foxit Reader | =10.1.4.37651 |
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Frequently Asked Questions
What is the severity of CVE-2021-21870?
CVE-2021-21870 has a critical severity rating due to the potential for arbitrary code execution.
How do I fix CVE-2021-21870?
To fix CVE-2021-21870, update Foxit PDF Reader to the latest version provided by the vendor.
What versions of Foxit Reader are affected by CVE-2021-21870?
CVE-2021-21870 specifically affects Foxit Reader version 10.1.4.37651.
What type of vulnerability is CVE-2021-21870?
CVE-2021-21870 is a use-after-free vulnerability in the JavaScript engine of Foxit PDF Reader.
What can attackers achieve with CVE-2021-21870?
Attackers can execute arbitrary code on a victim's system by exploiting CVE-2021-21870 through a malicious PDF document.
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- version/foxit reader/10.1.4.37651