CVE-2022-20936 Explained : Impact and Mitigation

Multiple vulnerabilities in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface of an affected device.

Understanding CVE-2022-20936

Cisco Firepower Management Center (FMC) Software is impacted by multiple vulnerabilities that could enable an attacker to execute arbitrary script code through a stored cross-site scripting (XSS) attack.

What is CVE-2022-20936?

The CVE-2022-20936 vulnerability arises due to inadequate validation of user-supplied input by the web-based management interface of Cisco Firepower Management Center (FMC) Software. Attackers can exploit these vulnerabilities by inserting malicious input into various data fields within the interface, potentially enabling them to execute arbitrary script code or access sensitive browser-based information.

The Impact of CVE-2022-20936

Successful exploitation of the vulnerabilities could allow an authenticated, remote attacker to perform stored cross-site scripting attacks against a user of the affected device's interface. This could result in executing arbitrary script code within the interface context, accessing sensitive information, or causing temporary availability issues on portions of the FMC Dashboard.

Technical Details of CVE-2022-20936

Vulnerability Description

The vulnerabilities stem from insufficient validation of user-supplied input in the web-based management interface, making it possible for attackers to insert crafted input and execute malicious scripts.

Affected Systems and Versions

Cisco Firepower Management Center (FMC) Software versions 6.2.3 to 7.2.1 are affected by these vulnerabilities.

Exploitation Mechanism

Attackers exploit these vulnerabilities by inserting malicious input into various data fields in the affected interface, potentially executing arbitrary script code or gaining unauthorized access to sensitive information.

Mitigation and Prevention

Immediate Steps to Take

Cisco has not detected any public announcements or malicious use of these vulnerabilities. However, users are advised to apply the necessary patches provided by Cisco to mitigate the risks.

Long-Term Security Practices

To enhance security posture, it is recommended to follow secure coding practices, conduct regular security assessments, and keep FMC Software up to date with the latest security patches.

Patching and Updates

Ensure that the Cisco Firepower Management Center (FMC) Software is updated to the latest version available from the vendor to address the identified vulnerabilities and enhance overall system security.