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A vulnerability in the Remote Access VPN (RAVPN) service of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) of the RAVPN service.
This vulnerability is due to resource exhaustion. An attacker could exploit this vulnerability by sending a large number of VPN authentication requests to an affected device. A successful exploit could allow the attacker to exhaust resources, resulting in a DoS of the RAVPN service on the affected device. Depending on the impact of the attack, a reload of the device may be required to restore the RAVPN service. Services that are not related to VPN are not affected.
Cisco Talos discussed these attacks in the blog post Large-scale brute-force activity targeting VPNs, SSH services with commonly used login credentials.
Metrics
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CVE CISA KEV Update by Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government10/24/2024 9:00:01 PM
Action
Type
Old Value
New Value
Added
Date Added
2024-10-24
Added
Due Date
2024-11-14
Added
Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Added
Vulnerability Name
Cisco ASA and FTD Denial-of-Service Vulnerability
New CVE Received from Cisco Systems, Inc.10/23/2024 2:15:11 PM
Action
Type
Old Value
New Value
Added
Description
A vulnerability in the Remote Access VPN (RAVPN) service of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) of the RAVPN service.
This vulnerability is due to resource exhaustion. An attacker could exploit this vulnerability by sending a large number of VPN authentication requests to an affected device. A successful exploit could allow the attacker to exhaust resources, resulting in a DoS of the RAVPN service on the affected device. Depending on the impact of the attack, a reload of the device may be required to restore the RAVPN service. Services that are not related to VPN are not affected.
Cisco Talos discussed these attacks in the blog post Large-scale brute-force activity targeting VPNs, SSH services with commonly used login credentials.
Added
CVSS V3.1
Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Added
CWE
Cisco Systems, Inc. CWE-772
Added
Reference
Cisco Systems, Inc. https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-bf-dos-vDZhLqrW [No types assigned]
Quick Info
CVE Dictionary Entry: CVE-2024-20481 NVD
Published Date: 10/23/2024 NVD
Last Modified: 10/29/2024
Source: Cisco Systems, Inc.