CVE-2019-20028 : Security Advisory and Response

This CVE-2019-20028 article provides insights into a vulnerability in NEC PBXes, including SV8100, SV9100, SL1100, and SL2100, allowing unauthorized access to voicemails and system content.

Understanding CVE-2019-20028

The vulnerability in NEC PBXes enables unauthenticated users to access voicemails, greetings, and system content through the WebPro administration interface.

What is CVE-2019-20028?

The InMail software in NEC PBXes, such as SV8100, SV9100, SL1100, and SL2100, derived from Aspire, allows unauthorized users to view voicemails and system content without authentication.

The Impact of CVE-2019-20028

This vulnerability poses a significant security risk as it grants unauthorized access to sensitive voicemails and system content, potentially leading to privacy breaches and unauthorized system modifications.

Technical Details of CVE-2019-20028

The following technical details outline the specifics of CVE-2019-20028:

Vulnerability Description

Aspire-derived NEC PBXes, including SV8100, SV9100, SL1100, and SL2100, allow unauthenticated read-only access to voicemails, greetings, and system content through the WebPro administration interface.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: All versions of SV8100, SV9100, SL1100, and SL2100 devices

Exploitation Mechanism

Unauthorized users can exploit this vulnerability by accessing the WebPro administration interface without the need for authentication.

Mitigation and Prevention

To address CVE-2019-20028, consider the following mitigation strategies:

Immediate Steps to Take

Restrict access to the WebPro administration interface to authorized personnel only.
Regularly monitor system logs for any unauthorized access attempts.
Implement strong password policies and multi-factor authentication.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and address vulnerabilities.
Keep systems up to date with the latest security patches and firmware updates.

Patching and Updates

Apply patches and updates provided by NEC to address the vulnerability and enhance system security.