CVE-2019-16366 Explained : Impact and Mitigation

A heap-based buffer overflow vulnerability has been identified in XS 9.0.0 within the Moddable SDK OS180329, specifically in the fxBeginHost function. This vulnerability can be exploited by executing malicious JavaScript code through xst.

Understanding CVE-2019-16366

This CVE involves a critical heap-based buffer overflow in a specific function within the Moddable SDK OS180329, potentially leading to security risks.

What is CVE-2019-16366?

The vulnerability exists in the fxBeginHost function in xsAPI.c when called from fxRunDefine in xsRun.c, allowing attackers to trigger a buffer overflow using crafted JavaScript code.

The Impact of CVE-2019-16366

The exploitation of this vulnerability could result in arbitrary code execution, denial of service, or other malicious activities by attackers.

Technical Details of CVE-2019-16366

This section provides in-depth technical insights into the vulnerability.

Vulnerability Description

A heap-based buffer overflow occurs in the fxBeginHost function within the Moddable SDK OS180329, triggered by specially crafted JavaScript code.

Affected Systems and Versions

Moddable SDK OS180329 with XS 9.0.0

Exploitation Mechanism

The vulnerability can be exploited by executing malicious JavaScript code through xst, potentially leading to unauthorized access or system compromise.

Mitigation and Prevention

Protecting systems from CVE-2019-16366 requires immediate actions and long-term security measures.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Restrict access to vulnerable systems.
Monitor for any unusual activities that could indicate exploitation.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and mitigate risks.

Patching and Updates

Ensure that the Moddable SDK OS180329 is updated to a secure version that addresses the heap-based buffer overflow vulnerability.