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.
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Cisco
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Adaptive Security Appliance
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Adaptive Security Appliance Software
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Asa 5505
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Asa 5512-x
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Asa 5515-x
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Firepower 2140
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Firepower 4115
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Firepower 4125
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Firepower 4140
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Firepower 4145
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Firepower 4150
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Firepower 9300
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Firepower Threat Defense
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Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2022-26045 | 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. |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Wed, 06 Nov 2024 17:15:00 +0000
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Projects
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Status: PUBLISHED
Assigner: cisco
Published:
Updated: 2024-11-06T16:22:08.505Z
Reserved: 2021-11-02T00:00:00
Link: CVE-2022-20795
Updated: 2024-08-03T02:24:49.655Z
Status : Modified
Published: 2022-04-21T19:15:08.740
Modified: 2024-11-21T06:43:34.283
Link: CVE-2022-20795
No data.
OpenCVE Enrichment
No data.
Weaknesses
EUVD