Vulnerability Description
A vulnerability in the SSL/TLS session handler of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a memory leak when closing SSL/TLS connections in a specific state. An attacker could exploit this vulnerability by establishing several SSL/TLS sessions and ensuring they are closed under certain conditions. A successful exploit could allow the attacker to exhaust memory resources in the affected device, which would prevent it from processing new SSL/TLS connections, resulting in a DoS. Manual intervention is required to recover an affected device.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Adaptive Security Appliance | < 9.6 |
| Cisco | Firepower Threat Defense | < 6.3.0.6 |
| Cisco | Adaptive Security Appliance Software | >= 9.8.0, < 9.8.4.26 |
Related Weaknesses (CWE)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-aVendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-aVendor Advisory
FAQ
What is CVE-2020-3572?
CVE-2020-3572 is a vulnerability with a CVSS score of 8.6 (HIGH). A vulnerability in the SSL/TLS session handler of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to ...
How severe is CVE-2020-3572?
CVE-2020-3572 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-3572?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Adaptive Security Appliance, Cisco Firepower Threat Defense, Cisco Adaptive Security Appliance Software.