Vulnerability Description
A vulnerability in the implementation of the Datagram TLS (DTLS) protocol in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause high CPU utilization, resulting in a denial of service (DoS) condition. This vulnerability is due to suboptimal processing that occurs when establishing a DTLS tunnel as part of an AnyConnect SSL VPN connection. An attacker could exploit this vulnerability by sending a steady stream of crafted DTLS traffic to an affected device. A successful exploit could allow the attacker to exhaust resources on the affected VPN headend device. This could cause existing DTLS tunnels to stop passing traffic and prevent new DTLS tunnels from establishing, resulting in a DoS condition. Note: When the attack traffic stops, the device recovers gracefully.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Adaptive Security Appliance | <= 9.16.3 |
| Cisco | Adaptive Security Appliance Software | >= 9.17.0, <= 9.17.1.9 |
| Cisco | Asa 5505 | - |
| Cisco | Asa 5512-X | - |
| Cisco | Asa 5515-X | - |
| Cisco | Asa 5525-X | - |
| Cisco | Asa 5545-X | - |
| Cisco | Asa 5555-X | - |
| Cisco | Asa 5580 | - |
| Cisco | Asa 5585-X | - |
| Cisco | Asa For Nexus 1000V | - |
| Cisco | Firepower Threat Defense | <= 7.0.1 |
| Cisco | Firepower 1010 | - |
| Cisco | Firepower 1120 | - |
| Cisco | Firepower 1140 | - |
| Cisco | Firepower 1150 | - |
| Cisco | Firepower 2110 | - |
| Cisco | Firepower 2120 | - |
| Cisco | Firepower 2130 | - |
| Cisco | Firepower 2140 | - |
Related Weaknesses (CWE)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vVendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vVendor Advisory
FAQ
What is CVE-2022-20795?
CVE-2022-20795 is a vulnerability with a CVSS score of 5.8 (MEDIUM). A vulnerability in the implementation of the Datagram TLS (DTLS) protocol in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthent...
How severe is CVE-2022-20795?
CVE-2022-20795 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-20795?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Adaptive Security Appliance, Cisco Adaptive Security Appliance Software, Cisco Asa 5505, Cisco Asa 5512-X, Cisco Asa 5515-X.