CVE-2020-10099 : Exploit Details and Defense Strategies

An XSS issue in Zammad 3.0 through 3.2 allows low-privileged users to inject malicious code via the Ticket feature, potentially affecting all users who interact with the ticket.

Understanding CVE-2020-10099

This CVE involves a cross-site scripting vulnerability in Zammad versions 3.0 through 3.2, enabling the execution of malicious JavaScript code.

What is CVE-2020-10099?

An XSS flaw in Zammad 3.0 through 3.2
Low-privileged users can insert harmful code via the Ticket function
Malicious JavaScript executes in users' browsers when interacting with the compromised ticket

The Impact of CVE-2020-10099

Allows attackers to execute arbitrary code in the context of the affected site
Potential for unauthorized access to sensitive information

Technical Details of CVE-2020-10099

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows for the injection of malicious code through the Ticket functionality in Zammad, leading to the execution of harmful JavaScript in users' browsers.

Affected Systems and Versions

Zammad versions 3.0 through 3.2
All systems running these versions are susceptible to the XSS issue

Exploitation Mechanism

Low-privileged users exploit the Ticket feature to insert malicious code
Malicious JavaScript executes when the compromised ticket is accessed

Mitigation and Prevention

Protecting systems from CVE-2020-10099 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Zammad to a patched version that addresses the XSS vulnerability
Educate users on identifying and avoiding suspicious links or content

Long-Term Security Practices

Regularly monitor and audit user inputs and system outputs for anomalies
Implement strict input validation and output encoding practices

Patching and Updates

Apply security patches provided by Zammad promptly
Stay informed about security advisories and updates from Zammad