CVE-2021-34833: 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-14023.
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 the severity of CVE-2021-34833?
The severity of CVE-2021-34833 is high with a CVSS score of 7.8.
How does CVE-2021-34833 allow remote code execution?
CVE-2021-34833 allows remote code execution by exploiting a use-after-free vulnerability in Foxit PDF Reader.
What software versions are affected by CVE-2021-34833?
Foxit PDF Reader 11.0.0.49893 and Foxitsoftware Pdf Editor 10.1.4.37651 are affected by CVE-2021-34833.
What is the recommended action to protect against CVE-2021-34833?
Update Foxit PDF Reader to the latest version available and exercise caution when visiting unknown websites or opening suspicious files.
Where can I find more information about CVE-2021-34833?
You can find more information about CVE-2021-34833 in the security bulletins provided by Foxit and the advisory from Zero Day Initiative.
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