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.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: cisco
Published: 2022-04-21T18:50:51.145597Z
Updated: 2024-09-16T20:03:00.504Z
Reserved: 2021-11-02T00:00:00
Link: CVE-2022-20795
Vulnrichment
No data.
NVD
Status : Modified
Published: 2022-04-21T19:15:08.740
Modified: 2023-11-07T03:42:58.327
Link: CVE-2022-20795
Redhat
No data.