CVE-2019-20029 : Exploit Details and Defense Strategies

A vulnerability allowing privilege escalation in NEC PBXes derived from Aspire has been identified, impacting various devices like SV8100, SV9100, SL1100, and SL2100.

Understanding CVE-2019-20029

This CVE involves a privilege escalation issue in the WebPro feature of Aspire-derived NEC PBXes.

What is CVE-2019-20029?

This vulnerability enables attackers to elevate their privileges by sending a specially crafted HTTP POST request, potentially gaining higher access privileges, including an undisclosed developer-level account.

The Impact of CVE-2019-20029

The exploitation of this vulnerability can lead to unauthorized privilege escalation, posing a significant security risk to affected NEC PBX devices.

Technical Details of CVE-2019-20029

This section provides detailed technical insights into the CVE-2019-20029 vulnerability.

Vulnerability Description

An exploitable privilege escalation vulnerability exists in the WebPro functionality of Aspire-derived NEC PBXes, affecting all versions of SV8100, SV9100, SL1100, and SL2100 devices.

Affected Systems and Versions

NEC PBX devices derived from Aspire, including SV8100, SV9100, SL1100, and SL2100
All versions of the mentioned devices

Exploitation Mechanism

By sending a specifically designed HTTP POST request, attackers can trigger privilege escalation, granting them higher access privileges, potentially including an undocumented developer-level account.

Mitigation and Prevention

Protecting systems from CVE-2019-20029 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by NEC promptly
Monitor network traffic for any suspicious HTTP POST requests
Restrict access to the affected systems

Long-Term Security Practices

Regularly update and patch all software and firmware on NEC PBX devices
Conduct security audits and penetration testing to identify and address vulnerabilities

Patching and Updates

Stay informed about security updates and advisories from NEC
Implement a robust patch management process to ensure timely application of security fixes