CVE-2024-20502
A vulnerability 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 on an affected device.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A vulnerability 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 on an affected device. This vulnerability is due to insufficient resource management while establishing SSL VPN sessions. An attacker could exploit this vulnerability by sending a series of crafted HTTPS requests to the VPN server of an affected device. A successful exploit could allow the attacker to cause the Cisco AnyConnect VPN server to stop accepting new connections, preventing new SSL VPN connections from being established. Existing SSL VPN sessions are not impacted. Note: When the attack traffic stops, the Cisco AnyConnect VPN server recovers gracefully without requiring manual intervention.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.52% probability · 43th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- cisco/meraki mx65 firmware · cisco/meraki mx64 firmware · cisco/meraki z4c firmware · cisco/meraki z4 firmware · cisco/meraki z3c firmware · cisco/meraki z3 firmware · cisco/meraki vmx firmware · cisco/meraki mx600 firmware · cisco/meraki mx450 firmware · cisco/meraki mx400 firmware · cisco/meraki mx250 firmware · cisco/meraki mx105 firmware · cisco/meraki mx100 firmware · cisco/meraki mx95 firmware · cisco/meraki mx85 firmware · cisco/meraki mx84 firmware · cisco/meraki mx75 firmware · cisco/meraki mx68w firmware · cisco/meraki mx68cw firmware · cisco/meraki mx68 firmware · +5 more
- Source
- psirt@cisco.com
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.