What is CVE-2022-20713?

CVE-2022-20713 is a medium-severity vulnerability in Cisco Adaptive Security Appliance Software, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 4.3/10. Published 2022-08-10.

How severe is CVE-2022-20713?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Is CVE-2022-20713 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Cisco Adaptive Security Appliance Software

CVE-2022-20713

A vulnerability in the VPN web client services component of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct browser-based attacks against users of an affected device. This vulnerability is due to improper validation of input that is passed to the VPN web client services component before being returned to the browser that is in use. An attacker could exploit this vulnerability by persuading a user to visit a website that is designed to pass malicious requests to a device that is running Cisco ASA Software or Cisco FTD Software and has web services endpoints supporting VPN features enabled. A successful exploit could allow the attacker to reflect malicious input from the affected device to the browser that is in use and conduct browser-based attacks, including cross-site scripting attacks. The attacker could not directly impact the affected device.

Vulnerability class: HTTP Request Smuggling

EPSS: 0.014 (69.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

Cisco Adaptive_security_appliance_software — versions 9.8.1, 9.8.1.5, 9.8.1.7
Cisco Adaptive Security Appliance (Asa) Software — versions 9.8.1, 9.8.1.5, 9.8.1.7
Cisco Firepower Threat Defense Software — versions 6.2.3, 6.2.3.1, 6.2.3.2
Cisco Firepower_threat_defense — versions 6.2.3, 6.2.3.1, 6.2.3.2
Cisco Secure_firewall_threat_defense — versions 6.2.3, 6.2.3.1, 6.2.3.2

Weakness classification (CWE)

Public proof-of-concept exploits

References

psirt@cisco.com (Vendor Advisory)

Frequently asked questions

What is CVE-2022-20713?: CVE-2022-20713 is a medium-severity vulnerability in Cisco Adaptive Security Appliance Software, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 4.3/10. Published 2022-08-10.
How severe is CVE-2022-20713?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2022-20713 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.