CVE-2018-10403 : Security Advisory and Response

F-Secure XFENCE and Little Flocker have a vulnerability that allows a carefully crafted Universal/fat binary to bypass third-party code signing verification, potentially executing malicious unsigned code.

Understanding CVE-2018-10403

This CVE involves a security issue in F-Secure XFENCE and Little Flocker related to code signing verification.

What is CVE-2018-10403?

A flaw in the affected software allows a specially crafted Universal/fat binary to evade third-party code signing checks, leading users to believe that the code is authorized by Apple when it may actually be malicious.

The Impact of CVE-2018-10403

The vulnerability could result in the execution of unsigned and potentially harmful code, posing a significant security risk to affected systems.

Technical Details of CVE-2018-10403

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The flaw enables a Universal/fat binary to circumvent third-party code signing verification, deceiving users into running unauthorized code.

Affected Systems and Versions

Product: F-Secure XFENCE and Little Flocker
Vendor: N/A
Versions: N/A

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a Universal/fat binary to evade code signing checks, tricking users into executing malicious code.

Mitigation and Prevention

Protecting systems from CVE-2018-10403 requires immediate actions and long-term security measures.

Immediate Steps to Take

Disable or restrict the execution of Universal/fat binaries from untrusted sources.
Regularly update the affected software to patched versions.

Long-Term Security Practices

Implement code signing best practices to verify the authenticity of third-party software.
Educate users on the risks of running unsigned code and the importance of verifying software sources.

Patching and Updates

Apply security patches provided by F-Secure for XFENCE and Little Flocker to address the vulnerability.