What is the severity of CVE-2021-21831?

CVE-2021-21831 is considered a critical vulnerability as it can lead to arbitrary code execution.

How do I fix CVE-2021-21831?

To fix CVE-2021-21831, upgrade to a later version of Foxit PDF Reader that addresses this use-after-free vulnerability.

What versions are affected by CVE-2021-21831?

CVE-2021-21831 affects Foxit Software’s PDF Reader version 10.1.3.37598.

How does CVE-2021-21831 work?

CVE-2021-21831 exploits a use-after-free condition in the JavaScript engine of the affected PDF Reader, allowing potential arbitrary code execution.

Can CVE-2021-21831 be exploited remotely?

Yes, CVE-2021-21831 can be exploited remotely if a user is tricked into opening a specially crafted PDF document.

Vulnerability/
CVE-2021-21831

high

8.8

CWE

416

5/8/2021

3/8/2024

CVE-2021-21831: 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 10.1.3.37598. A specially crafted PDF document can trigger the reuse of previously freed memory, which can lead to arbitrary code execution. An attacker needs to trick the user to open the malicious file to trigger this vulnerability. Exploitation is also possible if a user visits a specially crafted, malicious site if the browser plugin extension is enabled.

Credit: talos-cna@cisco.com

Affected Software	Affected Version	How to fix
Foxit Reader	=10.1.3.37598

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Reference Links

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1294

Frequently Asked Questions

What is the severity of CVE-2021-21831?
CVE-2021-21831 is considered a critical vulnerability as it can lead to arbitrary code execution.
How do I fix CVE-2021-21831?
To fix CVE-2021-21831, upgrade to a later version of Foxit PDF Reader that addresses this use-after-free vulnerability.
What versions are affected by CVE-2021-21831?
CVE-2021-21831 affects Foxit Software’s PDF Reader version 10.1.3.37598.
How does CVE-2021-21831 work?
CVE-2021-21831 exploits a use-after-free condition in the JavaScript engine of the affected PDF Reader, allowing potential arbitrary code execution.
Can CVE-2021-21831 be exploited remotely?
Yes, CVE-2021-21831 can be exploited remotely if a user is tricked into opening a specially crafted PDF document.

agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/weakness
agent/references
agent/severity
agent/last-modified-date
agent/author
agent/first-publish-date
agent/event
agent/description
agent/source
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/foxit
canonical/foxit reader
version/foxit reader/10.1.3.37598

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Frequently Asked Questions

What is the severity of CVE-2021-21831?
CVE-2021-21831 is considered a critical vulnerability as it can lead to arbitrary code execution.
How do I fix CVE-2021-21831?
To fix CVE-2021-21831, upgrade to a later version of Foxit PDF Reader that addresses this use-after-free vulnerability.
What versions are affected by CVE-2021-21831?
CVE-2021-21831 affects Foxit Software’s PDF Reader version 10.1.3.37598.
How does CVE-2021-21831 work?
CVE-2021-21831 exploits a use-after-free condition in the JavaScript engine of the affected PDF Reader, allowing potential arbitrary code execution.
Can CVE-2021-21831 be exploited remotely?
Yes, CVE-2021-21831 can be exploited remotely if a user is tricked into opening a specially crafted PDF document.