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CVE-2020-3574

HIGHCVSS 7.5/10EPSS 7.94%

Last modified

CVE-2020-3574 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 7.94% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
7.94%

94.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
CiscoIp Dect 210 Firmware< 4.8.1—
CiscoIp Dect 6825 Firmware< 4.8.1—
CiscoIp Phone 8811 Firmware< 11.3.2—
CiscoIp Phone 8841 Firmware< 11.3.2—
CiscoIp Phone 8851 Firmware< 11.3.2—
CiscoIp Phone 8861 Firmware< 11.3.2—
CiscoUnified Ip Conference Phone 8831 Firmware9.3\(4\)Servicerelease3
CiscoWebex Room Phone Firmware< 1.2.0—

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3574?
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.
How severe is CVE-2020-3574?
CVE-2020-3574 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 7.94% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3574?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-3574?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST