CVE-2019-9540 : What You Need to Know

Telos Automated Message Handling System version prior to 4.1.5.5 is vulnerable to Cross-site Scripting (XSS) in the prefs.asp file, allowing remote attackers to inject scripts into an AMHS session.

Understanding CVE-2019-9540

This CVE involves a vulnerability in the Telos Automated Message Handling System that can be exploited through a reflected XSS attack.

What is CVE-2019-9540?

The Telos Automated Message Handling System version prior to 4.1.5.5 has a Cross-site Scripting vulnerability in the prefs.asp file, enabling remote attackers to inject malicious scripts into an AMHS session.

The Impact of CVE-2019-9540

This vulnerability could lead to unauthorized script execution in the context of a user's session, potentially compromising sensitive data or performing actions on behalf of the user.

Technical Details of CVE-2019-9540

The technical aspects of the CVE-2019-9540 vulnerability are as follows:

Vulnerability Description

The vulnerability is classified as CWE-79: Improper Neutralization of Input During Web Page Generation (Cross-site Scripting).

Affected Systems and Versions

Product: Automated Message Handling System
Vendor: Telos
Vulnerable Versions: < 4.1.5.5 (unspecified/custom version)

Exploitation Mechanism

Attackers can exploit the vulnerability by injecting malicious scripts into the prefs.asp file, affecting Telos AMHS sessions.

Mitigation and Prevention

To address CVE-2019-9540, follow these mitigation strategies:

Immediate Steps to Take

Update Telos Automated Message Handling System to version 4.1.5.5 or higher to eliminate the vulnerability.
Monitor and restrict user input to prevent script injection attacks.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and address vulnerabilities.
Educate users on safe browsing practices and the risks of executing untrusted scripts.

Patching and Updates

Stay informed about security advisories and promptly apply patches released by Telos to secure the AMHS system.