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 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-14019.
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-2021-34838?
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/).
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