CVE-2022-20795

תיאור (מקור, אנגלית)

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.

מדדים

CVSS 3.1

7.5 (HIGH) מקור הציון: NVD CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — סבירות ניצול

1% (אחוזון 000) נכון ל-19/8/2026

CWE

CWE-345

מוצרים מושפעים

cisco: adaptive security appliance; cisco: adaptive security appliance software; 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: secure firewall threat defense; cisco: firepower 1010; cisco: firepower 1120; cisco: firepower 1140

קישורים

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa‮… Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa‮… Vendor Advisory