CVE-2021-34843: 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 11.0.0.49893. 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. Was ZDI-CAN-14025.
Credit: zdi-disclosures@trendmicro.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| 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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Reference Links
Frequently Asked Questions
What is CVE-2021-34843?
CVE-2021-34843 is a vulnerability that allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893.
How does CVE-2021-34843 work?
CVE-2021-34843 works by exploiting a use-after-free flaw within the handling of annotations in Foxit PDF Reader.
What can an attacker do with CVE-2021-34843?
With CVE-2021-34843, an attacker can remotely execute arbitrary code on the target system.
Is user interaction required to exploit CVE-2021-34843?
Yes, user interaction is required for an attacker to exploit CVE-2021-34843. The target must visit a malicious page or open a malicious file.
How can I fix CVE-2021-34843?
To fix CVE-2021-34843, update your Foxit PDF Reader installation to the latest version provided by the vendor.
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