How can an attacker exploit CVE-2021-34842?

To exploit CVE-2021-34842, the attacker needs the target to visit a malicious page or open a malicious file.

What software versions are affected by CVE-2021-34842?

Foxit PDF Reader 11.0.0.49893 and earlier versions are affected by CVE-2021-34842.

What is the severity of CVE-2021-34842?

CVE-2021-34842 has a severity rating of 7.8, which is considered high.

How can I fix the CVE-2021-34842 vulnerability?

To fix the CVE-2021-34842 vulnerability, users should update to the latest version of Foxit PDF Reader.

Vulnerability/
CVE-2021-34842

high

7.8

CWE

416

4/8/2021

8/2/2022

21/10/2023

CVE-2021-34842: Foxit PDF Reader Annotation Use-After-Free Remote Code Execution Vulnerability

Q: What is CVE-2021-34842?

CVE-2021-34842 is a vulnerability that allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893.

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-2021-34842?
CVE-2021-34842 is a vulnerability that allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893.
How can an attacker exploit CVE-2021-34842?
To exploit CVE-2021-34842, the attacker needs the target to visit a malicious page or open a malicious file.
What software versions are affected by CVE-2021-34842?
Foxit PDF Reader 11.0.0.49893 and earlier versions are affected by CVE-2021-34842.
What is the severity of CVE-2021-34842?
CVE-2021-34842 has a severity rating of 7.8, which is considered high.
How can I fix the CVE-2021-34842 vulnerability?
To fix the CVE-2021-34842 vulnerability, users should update to the latest version of Foxit PDF Reader.

collector/zdi-advisory
alias/ZDI-21-924
alias/ZDI-CAN-14024
alias/CVE-2021-34842
collector/nvd-index
agent/title
agent/references
agent/weakness
agent/severity
agent/author
agent/type
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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