What is CVE-2021-34838?

CVE-2021-34838 is a vulnerability in Foxit PDF Reader that allows remote attackers to execute arbitrary code on affected installations.

How severe is CVE-2021-34838?

CVE-2021-34838 has a severity rating of 7.8, which is considered high.

Which versions of Foxit PDF Reader are affected?

Foxit PDF Reader versions 11.0.0.49893 and below are affected by CVE-2021-34838.

What is the required user interaction to exploit CVE-2021-34838?

To exploit CVE-2021-34838, the target must visit a malicious page or open a malicious file.

Where can I find more information about CVE-2021-34838?

You can find more information about CVE-2021-34838 in the security bulletins provided by Foxit (https://www.foxit.com/support/security-bulletins.html) and the advisory from Zero Day Initiative (https://www.zerodayinitiative.com/advisories/ZDI-21-920/).

Vulnerability/
CVE-2021-34838

high

7.8

CWE

416

4/8/2021

8/2/2022

21/10/2023

CVE-2021-34838: Foxit PDF Reader Annotation Use-After-Free Remote Code Execution Vulnerability

First published: Wed Aug 04 2021(Updated: )

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF 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 Annotation objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process.

Credit: zdi-disclosures@trendmicro.com

Affected Software	Affected Version	How to fix
Foxit PDF Reader
Foxit PDF Reader	<=11.0.0.49893
Foxitsoftware Pdf Editor	<=10.1.4.37651
Foxitsoftware Pdf Editor	=11.0.0.49893
Microsoft Windows

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Frequently Asked Questions

What is CVE-2021-34838?
CVE-2021-34838 is a vulnerability in Foxit PDF Reader that allows remote attackers to execute arbitrary code on affected installations.
How severe is CVE-2021-34838?
CVE-2021-34838 has a severity rating of 7.8, which is considered high.
Which versions of Foxit PDF Reader are affected?
Foxit PDF Reader versions 11.0.0.49893 and below are affected by CVE-2021-34838.
What is the required user interaction to exploit CVE-2021-34838?
To exploit CVE-2021-34838, the target must visit a malicious page or open a malicious file.
Where can I find more information about CVE-2021-34838?
You can find more information about CVE-2021-34838 in the security bulletins provided by Foxit (https://www.foxit.com/support/security-bulletins.html) and the advisory from Zero Day Initiative (https://www.zerodayinitiative.com/advisories/ZDI-21-920/).

collector/zdi-advisory
alias/ZDI-21-920
alias/ZDI-CAN-14019
alias/CVE-2021-34838
collector/nvd-index
vendor/foxit
canonical/foxit pdf reader
version/foxit pdf reader/11.0.0.49893
vendor/foxitsoftware
canonical/foxitsoftware pdf editor
version/foxitsoftware pdf editor/10.1.4.37651
version/foxitsoftware pdf editor/11.0.0.49893
vendor/microsoft
canonical/microsoft windows

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