Cisco Firepower Management Center (FMC) Software is an essential tool for managing and monitoring network security devices. However, multiple vulnerabilities have been identified within its web-based management interface. These vulnerabilities could enable an authenticated, remote attacker to perform stored cross-site scripting (XSS) attacks against users of the affected interface. In this post, we will discuss the details of these vulnerabilities, provide code snippets, and share links to original references to help users protect their systems.
Vulnerabilities Details
The vulnerabilities identified in the web-based management interface of Cisco FMC Software are attributed to insufficient validation of user-supplied input by the interface. An attacker could exploit these vulnerabilities by inserting crafted input, such as script code, into various data fields of an affected interface.
Successful exploitation of these vulnerabilities may allow the attacker to execute arbitrary script code within the context of the affected interface or access sensitive, browser-based information. In some instances, the exploitation could also cause a temporary availability impact on parts of the FMC Dashboard.
The vulnerabilities are tagged as CVE-2022-20833, and the severity level is considered high.
Code Snippet
To demonstrate the vulnerability, an attacker can insert the following sample malicious script code in one of the vulnerable data fields within the web-based management interface:
<script>alert('XSS')</script>
Upon successful injection, when the user interacts with the affected interface, the JavaScript code will execute, triggering an alert with the message 'XSS'.
Exploit Details
To exploit these vulnerabilities, the attacker should have credentials to access the web-based management interface of Cisco FMC Software. Once the attacker gains access, they can target specific input fields in the affected interface and insert crafted input.
To mitigate the issue, users are advised to apply patches released by Cisco as soon as possible. The patches can be found at the following link:
- Cisco Security Advisory
Additionally, it is crucial to ensure that only trusted personnel should have access to the management interface of the Cisco FMC Software and to enforce strong password policies.
Conclusion
CVE-2022-20833 affects Cisco Firepower Management Center Software, potentially allowing an authenticated, remote attacker to execute stored cross-site scripting (XSS) attacks. To prevent the exploitation of these vulnerabilities, users should apply the recommended security patches and follow the best practices for securing their network management systems.
Timeline
Published on: 11/15/2022 21:15:00 UTC
Last modified on: 11/18/2022 18:14:00 UTC