CVE-2019-15642 : Vulnerability Insights and Analysis

Webmin version 1.920 is affected by an authenticated Remote Code Execution vulnerability in the rpc.cgi script. This CVE allows unauthorized execution of commands or modification of files through a crafted object name.

Understanding CVE-2019-15642

Webmin version 1.920 is susceptible to an authenticated Remote Code Execution vulnerability that can be exploited through the rpc.cgi script.

What is CVE-2019-15642?

The vulnerability in Webmin version 1.920 allows attackers to execute commands or modify files by triggering an eval call in the unserialise_variable function using a malicious object name.

The Impact of CVE-2019-15642

Granting access to the RPC functionality in Webmin exposes servers to potential unauthorized execution of commands or file modifications, emphasizing the importance of caution when providing access to untrusted Webmin users.

Technical Details of CVE-2019-15642

Webmin version 1.920's vulnerability can be further understood through technical details.

Vulnerability Description

The rpc.cgi script in Webmin through version 1.920 enables authenticated Remote Code Execution due to the eval call triggered by unserialise_variable when a crafted object name is provided.

Affected Systems and Versions

Product: Webmin
Vendor: Webmin
Version: 1.920

Exploitation Mechanism

The vulnerability can be exploited by providing a malicious object name, which triggers an eval call in the unserialise_variable function, leading to unauthorized execution of commands or file modifications.

Mitigation and Prevention

Protecting systems from CVE-2019-15642 requires immediate steps and long-term security practices.

Immediate Steps to Take

Update Webmin to a patched version that addresses the vulnerability.
Restrict access to the RPC functionality in Webmin to trusted users only.

Long-Term Security Practices

Regularly monitor and audit access to Webmin and other critical server functionalities.
Educate users on safe practices and the risks associated with granting access to sensitive server features.

Patching and Updates

Ensure timely installation of security patches and updates for Webmin to mitigate the risk of exploitation.