CVE-2019-11855 : What You Need to Know

ALEOS LAN-Side RPC Server vulnerability affecting versions prior to 4.12.0, 4.9.5, and 4.4.9.

Understanding CVE-2019-11855

This CVE involves the automatic activation of an RPC server on the LAN of ALEOS gateway before specific versions.

What is CVE-2019-11855?

An RPC server is enabled by default on the LAN of ALEOS gateways before versions 4.12.0, 4.9.5, and 4.4.9.

The Impact of CVE-2019-11855

CVSS Base Score: 8.1 (High)
Attack Vector: Network
Attack Complexity: High
Privileges Required: None
Confidentiality, Integrity, and Availability Impact: High

Technical Details of CVE-2019-11855

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows an RPC server to be automatically activated on the LAN of ALEOS gateways before specific versions, potentially leading to unauthorized access.

Affected Systems and Versions

Affected Versions: Prior to 4.12.0, 4.9.5, and 4.4.9

Exploitation Mechanism

The RPC server is automatically activated on the LAN, providing a potential entry point for attackers to exploit the system.

Mitigation and Prevention

Protecting systems from CVE-2019-11855 is crucial to maintaining security.

Immediate Steps to Take

Update ALEOS gateways to versions 4.12.0, 4.9.5, or 4.4.9 to mitigate the vulnerability.
Disable unnecessary services and ports on the LAN to reduce attack surface.

Long-Term Security Practices

Regularly monitor and audit network traffic for any suspicious activity.
Implement network segmentation to isolate critical systems from potentially compromised areas.

Patching and Updates

Apply security patches and updates provided by the vendor to address the vulnerability.