Vulnerability Name: | CVE-2022-20933 (CCN-238629) | ||||||||||||
Assigned: | 2021-11-02 | ||||||||||||
Published: | 2022-10-19 | ||||||||||||
Updated: | 2022-10-31 | ||||||||||||
Summary: | A vulnerability in the Cisco AnyConnect VPN server of Cisco Meraki MX and Cisco Meraki Z3 Teleworker Gateway devices could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation of client-supplied parameters while establishing an SSL VPN session. An attacker could exploit this vulnerability by crafting a malicious request and sending it to the affected device. A successful exploit could allow the attacker to cause the Cisco AnyConnect VPN server to crash and restart, resulting in the failure of the established SSL VPN connections and forcing remote users to initiate a new VPN connection and re-authenticate. 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. Cisco Meraki has released software updates that address this vulnerability. | ||||||||||||
CVSS v3 Severity: | 8.6 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H) 7.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
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CVSS v2 Severity: | 7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
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Vulnerability Type: | CWE-Other | ||||||||||||
Vulnerability Consequences: | Denial of Service | ||||||||||||
References: | Source: MITRE Type: CNA CVE-2022-20933 Source: XF Type: UNKNOWN cisco-cve202220933-dos(238629) Source: CCN Type: cisco-sa-meraki-mx-vpn-dos-vnESbgBf Cisco Meraki MX and Z3 Teleworker Gateway VPN Denial of Service Vulnerability Source: CISCO Type: Vendor Advisory 20221019 Cisco Meraki MX and Z3 Teleworker Gateway VPN Denial of Service Vulnerability | ||||||||||||
Vulnerable Configuration: | Configuration 1: Configuration 2: Configuration 3: Configuration 4: Configuration 5: Configuration 6: Configuration 7: Configuration 8: Configuration 9: Configuration 10: Configuration 11: Configuration 12: Configuration 13: Configuration 14: Configuration 15: Configuration 16: Configuration 17: Configuration 18: Configuration 19: Configuration 20: Configuration 21: Configuration 22: Configuration 23: Configuration CCN 1: ![]() | ||||||||||||
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