Cisco AnyConnect VPN Serveremon, Remote Users Vulnerable to DoS Attacks

CVE-2024-20501
8.6HIGH

Key Information

Vendor
Cisco
Status
Cisco Meraki Mx Firmware
Vendor
CVE Published:
2 October 2024

Badges

👾 Exploit Exists

Summary

Multiple vulnerabilities in the Cisco AnyConnect VPN server of Cisco Meraki MX and Cisco Meraki Z Series Teleworker Gateway devices could allow an unauthenticated, remote attacker to cause a DoS condition in the AnyConnect service on an affected device. These vulnerabilities are due to insufficient validation of client-supplied parameters while establishing an SSL VPN session. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request to the VPN server of an affected device. A successful exploit could allow the attacker to cause the Cisco AnyConnect VPN server to restart, resulting in the failure of the established SSL VPN connections and forcing remote users to initiate a new VPN connection and reauthenticate. A sustained attack could prevent new SSL VPN connections from being established. Note: When the attack traffic stops, the Cisco AnyConnect VPN server recovers gracefully without requiring manual intervention.

Affected Version(s)

Cisco Meraki MX Firmware =

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published.

  • Vulnerability Reserved.

  • 👾

    Exploit exists.

Collectors

NVD DatabaseMitre Database
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