CVE-2021-34842: 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-14024.
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-2021-34842?
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.