CVE-2022-20836 Explained : Impact and Mitigation

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

Understanding CVE-2022-20836

This CVE highlights critical vulnerabilities in the Cisco Firepower Management Center (FMC) Software that could be exploited by an attacker to conduct a stored XSS attack.

What is CVE-2022-20836?

The vulnerabilities in the Cisco FMC Software arise from inadequate validation of user-supplied input by the web-based management interface. This oversight allows an attacker to insert malicious input into various data fields, potentially leading to the execution of arbitrary script code in the context of the interface.

The Impact of CVE-2022-20836

A successful exploitation of these vulnerabilities could enable an attacker to access sensitive browser-based information, execute arbitrary script code within the interface, and in some instances, cause temporary availability disruptions to parts of the FMC Dashboard.

Technical Details of CVE-2022-20836

Below are the specific technical details of this CVE:

Vulnerability Description

The vulnerability involves insufficient validation of user-supplied input by the web-based management interface of Cisco Firepower Management Center (FMC) Software.

Affected Systems and Versions

The issue impacts various versions of the Cisco FMC Software, from 6.1.0 to 7.1.0.2.

Exploitation Mechanism

Attackers can exploit these vulnerabilities by inserting crafted input into data fields within the affected interface.

Mitigation and Prevention

Given the severity of the vulnerabilities, immediate action is necessary to mitigate potential risks.

Immediate Steps to Take

Users are advised to apply patches provided by Cisco to address the vulnerabilities. Additionally, monitoring network activities for any suspicious behavior is recommended.

Long-Term Security Practices

Regularly updating and patching software, as well as providing security awareness training to staff, can help prevent similar incidents in the future.

Patching and Updates

Cisco has released patches to address these vulnerabilities. Users are urged to promptly update their Cisco Firepower Management Center (FMC) Software to the latest secure versions for enhanced protection.