CVE-2020-3574 Cisco IP Phone TCP Packet Flood Denial of Service Vulnerability
Remote attackers can cause Cisco IP Phones to reload or drop calls by sending high-rate crafted TCP traffic due to insufficient rate limiting.
- 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-2020-3574?
CVE-2020-3574 is a high-severity denial of service vulnerability in Cisco IP Phones with Multiplatform Firmware, published on 6 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the TCP packet processing functionality of Cisco IP Phones could allow an unauthenticated, remote attacker to cause the phone to stop responding to incoming calls, drop connected calls, or unexpectedly reload. The vulnerability is due to insufficient TCP ingress packet rate limiting. An attacker could exploit this vulnerability by sending a high and sustained rate of crafted TCP traffic to the targeted device. A successful exploit could allow the attacker to impact operations of the phone or cause the phone to reload, leading to a denial of service (DoS) condition.
Weakness: CWE-371
Which versions are affected by CVE-2020-3574?
It affects 8 products.
Products include Cisco Ip Dect 210 Firmware, Cisco Ip Dect 6825 Firmware, Cisco Ip Phone 8811 Firmware, Cisco Ip Phone 8841 Firmware, Cisco Ip Phone 8851 Firmware, Cisco Ip Phone 8861 Firmware and 2 more.
How do I fix CVE-2020-3574?
No fix has been published for CVE-2020-3574 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-3574 being exploited?
There is no known exploitation of CVE-2020-3574 in the wild and no public exploit code.
Sources
Also known as GHSA-gp65-v6f3-j928.