CVE-2023-27916 Explained : Impact and Mitigation

This CVE record was published on June 6, 2023, by ICS-CERT. It involves the lack of proper validation of user-supplied data in certain applications, potentially leading to arbitrary code execution.

Understanding CVE-2023-27916

This vulnerability, reported by Michael Heinzl to CISA, affects Horner Automation's products, specifically Cscape (v9.90 SP8) and Cscape EnvisionRV (v4.70).

What is CVE-2023-27916?

The vulnerability stems from inadequate validation of user-supplied data when parsing font files, such as FNT. This oversight can result in an out-of-bounds read, enabling an attacker to execute arbitrary code within the current process.

The Impact of CVE-2023-27916

With a CVSS v3.1 base score of 7.8 and a high severity rating, this vulnerability can have critical implications. The attack complexity is low, but the availability, confidentiality, and integrity impacts are all high. User interaction is required for exploitation in a local attack vector scenario.

Technical Details of CVE-2023-27916

This vulnerability falls under CWE-125 (Out-of-bounds Read).

Vulnerability Description

The lack of proper data validation when handling font files can lead to out-of-bounds read vulnerabilities, opening the door for arbitrary code execution by malicious actors.

Affected Systems and Versions

Horner Automation's Cscape (v9.90 SP8) and Cscape EnvisionRV (v4.70) are affected by this vulnerability.

Exploitation Mechanism

Exploiting this vulnerability requires no special privileges, as it can be carried out locally with user interaction.

Mitigation and Prevention

To address CVE-2023-27916, Horner Automation has provided the following solutions:

Immediate Steps to Take

It is recommended to upgrade the affected software:

Cscape: Update to v9.90 SP9
Cscape Envision RV: Update to v4.80

Long-Term Security Practices

Implementing secure coding practices, regular security updates, and monitoring for vulnerability disclosures can enhance overall system security.

Patching and Updates

Regularly check for security updates from software vendors and apply patches promptly to safeguard against known vulnerabilities.