CVE-2023-26423 : Security Advisory and Response

This CVE record pertains to a Use-After-Free Remote Code Execution Vulnerability in Adobe Acrobat Reader DC AcroForm insertItemAt.

Understanding CVE-2023-26423

This vulnerability affects Adobe Acrobat Reader versions 23.001.20093 and earlier, as well as 20.005.30441 and earlier. It poses a risk of arbitrary code execution in the context of the current user, requiring user interaction to exploit by opening a malicious file.

What is CVE-2023-26423?

CVE-2023-26423 is classified as a Use-After-Free vulnerability (CWE-416) within Adobe Acrobat Reader DC AcroForm insertItemAt. It allows an attacker to execute arbitrary code, potentially compromising the confidentiality, integrity, and availability of the system.

The Impact of CVE-2023-26423

With a CVSSv3.1 base score of 7.8 (High Severity), the vulnerability requires no special privileges to be exploited and can lead to severe consequences. The attack complexity is low, but user interaction is necessary for successful exploitation, making it imperative for users to be cautious when handling PDF files.

Technical Details of CVE-2023-26423

This section delves into the specifics of the vulnerability, including its description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The Use-After-Free flaw in Adobe Acrobat Reader DC AcroForm insertItemAt allows an attacker to manipulate memory in a way that could lead to the execution of arbitrary code, potentially compromising the security of the system.

Affected Systems and Versions

The vulnerable versions include Adobe Acrobat Reader versions 23.001.20093 and earlier, as well as 20.005.30441 and earlier. Users on these versions are at risk of exploitation and should take immediate action to mitigate the threat.

Exploitation Mechanism

Exploiting CVE-2023-26423 requires user interaction, where the victim unknowingly opens a malicious file crafted to trigger the vulnerability. Once the file is opened, the attacker can execute arbitrary code on the victim's system.

Mitigation and Prevention

In light of CVE-2023-26423, it is crucial for users and organizations to take immediate steps to secure their systems, adopt long-term security practices, and apply necessary patches and updates to mitigate the risk.

Immediate Steps to Take

Users are advised to exercise caution when handling PDF files, especially those from untrusted sources. They should refrain from opening suspicious or unexpected attachments to prevent potential exploitation of the vulnerability.

Long-Term Security Practices

Implementing robust cybersecurity measures such as ensuring regular software updates, maintaining strong email security protocols, and educating users on safe browsing practices can help enhance overall security posture and prevent similar vulnerabilities in the future.

Patching and Updates

Adobe has likely released updates to address the CVE-2023-26423 vulnerability. Users are strongly encouraged to promptly apply these patches to their Adobe Acrobat Reader installations to remediate the security issue and safeguard their systems against potential attacks.