CVE-2021-34850: Foxit PDF Reader Annotation Use-After-Free Remote Code Execution Vulnerability
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-14529.
Other sources
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.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2021-34850?
CVE-2021-34850 is a vulnerability in Foxit PDF Reader that allows remote attackers to execute arbitrary code on affected installations.
How does CVE-2021-34850 work?
CVE-2021-34850 exploits a use-after-free vulnerability in Foxit PDF Reader, which can be triggered by visiting a malicious page or opening a malicious file.
What is the severity of CVE-2021-34850?
The severity of CVE-2021-34850 is rated as high, with a CVSS score of 7.8.
Which versions of Foxit PDF Reader are affected by CVE-2021-34850?
Foxit PDF Reader version 11.0.0.49893 is affected by CVE-2021-34850.
How can I fix CVE-2021-34850?
To fix CVE-2021-34850, it is recommended to update to the latest version of Foxit PDF Reader available, as provided by the vendor.