CVE-2019-11454 : Exploit Details and Defense Strategies

An unauthenticated attacker can exploit a persistent cross-site scripting (XSS) vulnerability in Tildeslash Monit version 5.25.3 or earlier by manipulating an unsanitized user input field in the Authorization header for HTTP Basic Authentication.

Understanding CVE-2019-11454

This CVE involves a security vulnerability in Tildeslash Monit that allows attackers to inject arbitrary JavaScript code.

What is CVE-2019-11454?

Persistent cross-site scripting (XSS) vulnerability in Tildeslash Monit version 5.25.3 or earlier allows remote unauthenticated attackers to introduce arbitrary JavaScript code by manipulating an unsanitized user field in the Authorization header for HTTP Basic Authentication.

The Impact of CVE-2019-11454

An unauthenticated attacker can inject arbitrary JavaScript code into the affected system.

Technical Details of CVE-2019-11454

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability exists in http/cervlet.c in Tildeslash Monit before version 5.25.3, where an attacker can introduce arbitrary JavaScript via manipulation of an unsanitized user field in the Authorization header for HTTP Basic Authentication, particularly during an _viewlog operation.

Affected Systems and Versions

Tildeslash Monit version 5.25.3 and earlier are affected.

Exploitation Mechanism

Attackers exploit the vulnerability by manipulating an unsanitized user input field in the Authorization header for HTTP Basic Authentication during an _viewlog operation.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Tildeslash Monit to version 5.25.3 or later to mitigate the vulnerability.
Implement input sanitization to prevent XSS attacks.

Long-Term Security Practices

Regularly monitor and audit user inputs for malicious content.
Educate users on safe browsing practices to prevent XSS attacks.

Patching and Updates

Stay informed about security updates and patches released by Tildeslash for Monit.