CVE-2021-28565 : What You Need to Know

Adobe Acrobat Reader DC versions 2021.001.20150 and earlier, 2020.001.30020 and earlier, as well as 2017.011.30194 and earlier are affected by an Out-of-bounds Read vulnerability in the PDFLibTool component, potentially leading to arbitrary code execution.

Understanding CVE-2021-28565

This CVE describes an Out-of-bounds Read vulnerability in Adobe Acrobat Reader that could allow an attacker to execute arbitrary code.

What is CVE-2021-28565?

The vulnerability affects specific versions of Adobe Acrobat Reader DC and could be exploited by an unauthenticated attacker through a malicious file.

The Impact of CVE-2021-28565

The vulnerability could lead to information exposure in a user's context if the exploit is successful.

Technical Details of CVE-2021-28565

The vulnerability is classified with a CVSSv3.1 base score of 4.3 (Medium severity).

Vulnerability Description

The Out-of-bounds Read vulnerability in PDFLibTool could result in arbitrary code execution under the context of the current user.

Affected Systems and Versions

Adobe Acrobat Reader DC versions 2021.001.20150, 2020.001.30020, and 2017.011.30194 are affected by this vulnerability.

Exploitation Mechanism

Successful exploitation requires an unauthenticated attacker to trick a user into opening a malicious file.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-28565, immediate steps must be taken along with long-term security practices.

Immediate Steps to Take

Users should update Acrobat Reader to the latest patched version and avoid opening untrusted PDF files.

Long-Term Security Practices

Regular software updates, security awareness training, and cautious file handling practices can help prevent such vulnerabilities.

Patching and Updates

Adobe has released security updates addressing this vulnerability. It is recommended to apply the latest patches to secure systems.