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.
References
| Link | Resource |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vpndtls-dos-TunzLEV | Vendor Advisory |
Configurations
Configuration 1 (hide)
| AND |
|
Configuration 2 (hide)
| AND |
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History
16 Aug 2023, 16:17
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* | |
| First Time |
Cisco adaptive Security Appliance Software
|
04 May 2022, 17:59
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4115:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_for_nexus_1000v:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_1140:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4112:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_2120:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_2130:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_2110:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4150:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4140:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4125:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4110:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_9300:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_1010:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_1150:-:*:*:*:*:*:*:* cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_2140:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4145:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_1120:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4120:-:*:*:*:*:*:*:* |
|
| References | (CISCO) https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vpndtls-dos-TunzLEV - Vendor Advisory | |
| CVSS |
v2 : v3 : |
v2 : 5.0
v3 : 7.5 |
| First Time |
Cisco asa 5555-x
Cisco firepower 4112 Cisco firepower 1120 Cisco Cisco asa 5585-x Cisco asa 5580 Cisco firepower 2140 Cisco firepower 4150 Cisco asa 5545-x Cisco firepower 9300 Cisco firepower 4115 Cisco asa 5515-x Cisco firepower 4110 Cisco firepower 4120 Cisco firepower 1010 Cisco firepower 4145 Cisco firepower 1140 Cisco asa 5525-x Cisco firepower 2120 Cisco adaptive Security Appliance Cisco firepower 4140 Cisco firepower Threat Defense Cisco firepower 2110 Cisco asa For Nexus 1000v Cisco asa 5505 Cisco asa 5512-x Cisco firepower 4125 Cisco firepower 2130 Cisco firepower 1150 |
|
| CWE | CWE-345 |
21 Apr 2022, 19:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2022-04-21 19:15
Updated : 2023-12-10 14:22
NVD link : CVE-2022-20795
Mitre link : CVE-2022-20795
CVE.ORG link : CVE-2022-20795
JSON object : View
Products Affected
cisco
- firepower_threat_defense
- adaptive_security_appliance
- asa_5545-x
- asa_5555-x
- firepower_1150
- firepower_4145
- firepower_1120
- firepower_4110
- firepower_4125
- asa_5505
- firepower_4120
- firepower_4140
- firepower_2110
- firepower_2130
- firepower_4112
- firepower_2120
- asa_5580
- firepower_4150
- firepower_2140
- firepower_9300
- firepower_1010
- asa_for_nexus_1000v
- asa_5512-x
- firepower_4115
- asa_5585-x
- adaptive_security_appliance_software
- firepower_1140
- asa_5525-x
- asa_5515-x
CWE
CWE-345
Insufficient Verification of Data Authenticity