CVE-2020-5724 : Exploit Details and Defense Strategies

The Grandstream UCM6200 series before 1.0.20.22 is vulnerable to an SQL injection via the HTTP server's websockify endpoint, allowing remote unauthenticated attackers to discover user passwords.

Understanding CVE-2020-5724

This CVE involves an SQL injection vulnerability in the Grandstream UCM6200 series.

What is CVE-2020-5724?

The CVE-2020-5724 vulnerability in Grandstream UCM6200 series allows attackers to perform SQL injection attacks through the HTTP server's websockify endpoint.

The Impact of CVE-2020-5724

This vulnerability enables remote unauthenticated attackers to access user passwords by crafting a username and invoking the challenge action.

Technical Details of CVE-2020-5724

The technical aspects of this CVE are as follows:

Vulnerability Description

SQL injection vulnerability in Grandstream UCM6200 series
Exploitable via the HTTP server's websockify endpoint

Affected Systems and Versions

Product: Grandstream UCM6200 series
Vendor: n/a
Versions Affected: 1.0.20.20 and below

Exploitation Mechanism

Remote unauthenticated attackers can exploit the vulnerability by invoking the challenge action with a crafted username.

Mitigation and Prevention

To address CVE-2020-5724, consider the following steps:

Immediate Steps to Take

Update the Grandstream UCM6200 series to version 1.0.20.22 or above
Implement strong authentication mechanisms

Long-Term Security Practices

Regularly monitor and audit web application security
Conduct security assessments and penetration testing

Patching and Updates

Apply security patches promptly
Stay informed about security advisories and updates