CVE-2024-20513 Other in Cisco Meraki MX Firmware
An attacker can terminate targeted SSL VPN sessions on Cisco Meraki devices by predicting session handlers, forcing users to reconnect.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-20513?
CVE-2024-20513 is a medium-severity vulnerability in Cisco Meraki MX Firmware, published on 2 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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 for targeted users of the AnyConnect service on an affected device.
This vulnerability is due to insufficient entropy for handlers that are used during SSL VPN session establishment. An unauthenticated attacker could exploit this vulnerability by brute forcing valid session handlers. An authenticated attacker could exploit this vulnerability by connecting to the AnyConnect VPN service of an affected device to retrieve a valid session handler and, based on that handler, predict further valid session handlers. The attacker would then send a crafted HTTPS request using the brute-forced or predicted session handler to the AnyConnect VPN server of the device. A successful exploit could allow the attacker to terminate targeted SSL VPN sessions, forcing remote users to initiate new VPN connections and reauthenticate.
Weakness: CWE-639
Which versions are affected by CVE-2024-20513?
It affects 25 products.
Products include Cisco Meraki Mx100 Firmware, Cisco Meraki Mx105 Firmware, Cisco Meraki Mx250 Firmware, Cisco Meraki Mx400 Firmware, Cisco Meraki Mx450 Firmware, Cisco Meraki Mx600 Firmware and 19 more.
How do I fix CVE-2024-20513?
No fix has been published for CVE-2024-20513 yet. Limit exposure of the affected software until one is available.
Is CVE-2024-20513 being exploited?
There is no known exploitation of CVE-2024-20513 in the wild and no public exploit code.
Other vulnerabilities in Cisco Meraki MX Firmware
- CVE-2024-20498 Denial of service in Cisco Meraki MX Firmware
- CVE-2024-20499 Denial of service in Cisco Meraki MX Firmware
- CVE-2024-20501 Denial of service in Cisco Meraki MX Firmware
- CVE-2022-20933 Cisco Meraki MX and Z3 Teleworker Gateway VPN Denial of Service Vulnerability
- CVE-2024-20500 Denial of service in Cisco Meraki MX Firmware
Sources
Also known as GHSA-45f4-7wmp-8679.