Vulnerability · Published Nov 6, 2020 · Assigned by cisco
CVE-2020-3574Cisco IP Phone TCP Packet Flood Denial of Service Vulnerability
High 7.5
In plain English
A high-severity security flaw in Cisco IP Phones with Multiplatform Firmware from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 8.0% (higher than 95% of all known vulnerabilities).
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco IP Phones with Multiplatform Firmware | n/a |
Weakness: CWE-371 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- 20201104 Cisco IP Phone TCP Packet Flood Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO