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CVE-2020-3111

HIGHCVSS 8.8/10EPSS 3.09%

Last modified

CVE-2020-3111 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A vulnerability in the Cisco Discovery Protocol implementation for the Cisco IP Phone could allow an unauthenticated, adjacent attacker to remotely execute code with root privileges or cause a reload of an affected IP phone. The vulnerability is due to missing checks when processing Cisco Discovery Protocol messages. EPSS estimates a 3.09% chance of exploitation in the next 30 days.

Description

A vulnerability in the Cisco Discovery Protocol implementation for the Cisco IP Phone could allow an unauthenticated, adjacent attacker to remotely execute code with root privileges or cause a reload of an affected IP phone. The vulnerability is due to missing checks when processing Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a crafted Cisco Discovery Protocol packet to the targeted IP phone. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

Metrics

CVSS 3.1
8.8/10

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

EPSS Probability
3.09%

86.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIp Conference Phone 7832 Firmware< 12.7\(1\)
CiscoIp Conference Phone 7832 With Multiplatform Firmware< 11.3\(1\)sr1
CiscoIp Conference Phone 8832 Firmware< 12.7\(1\)
CiscoIp Conference Phone 8832 With Multiplatform Firmware< 11.3\(1\)sr1
CiscoIp Phone 6821 Firmware< 11.3\(1\)sr1
CiscoIp Phone 6841 Firmware< 11.3\(1\)sr1
CiscoIp Phone 6851 Firmware< 11.3\(1\)sr1
CiscoIp Phone 6861 Firmware< 11.3\(1\)sr1
CiscoIp Phone 6871 Firmware< 11.3\(1\)sr1
CiscoIp Phone 7811 Firmware< 12.7\(1\)
CiscoIp Phone 7811 With Multiplatform Firmware< 11.3\(1\)sr1
CiscoIp Phone 7821 Firmware< 12.7\(1\)
CiscoIp Phone 7821 With Multiplatform Firmware< 11.3\(1\)sr1
CiscoIp Phone 7841 Firmware< 12.7\(1\)
CiscoIp Phone 7841 With Multiplatform Firmware< 11.3\(1\)sr1
CiscoIp Phone 7861 Firmware< 12.7\(1\)
CiscoIp Phone 7861 With Multiplatform Firmware< 11.3\(1\)sr1
CiscoIp Phone 8811 Firmware< 12.7\(1\)
CiscoIp Phone 8811 With Multiplatform Firmware< 11.3\(1\)sr1
CiscoIp Phone 8841 Firmware< 12.7\(1\)
CiscoIp Phone 8841 With Multiplatform Firmware< 11.3\(1\)sr1
CiscoIp Phone 8851 Firmware< 12.7\(1\)
CiscoIp Phone 8851 With Multiplatform Firmware< 11.3\(1\)sr1
CiscoIp Phone 8861 Firmware< 12.7\(1\)
CiscoIp Phone 8861 With Multiplatform Firmware< 11.3\(1\)sr1
CiscoIp Phone 8845 Firmware< 12.7\(1\)
CiscoIp Phone 8845 With Multiplatform Firmware< 11.3\(1\)sr1
CiscoIp Phone 8865 Firmware< 12.7\(1\)
CiscoIp Phone 8865 With Multiplatform Firmware< 11.3\(1\)sr1
CiscoUnified Ip Conference Phone 8831 Firmware< 10.3\(1\)sr6
CiscoUnified Ip Conference Phone 8831 For Third-Party Call Control FirmwareAll versions
CiscoWireless Ip Phone 8821 Firmware< 11.0\(5\)sr2
CiscoWireless Ip Phone 8821-Ex Firmware< 11.0\(5\)sr2

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3111?
A vulnerability in the Cisco Discovery Protocol implementation for the Cisco IP Phone could allow an unauthenticated, adjacent attacker to remotely execute code with root privileges or cause a reload of an affected IP phone. The vulnerability is due to missing checks when processing Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a crafted Cisco Discovery Protocol packet to the targeted IP phone. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
How severe is CVE-2020-3111?
CVE-2020-3111 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 3.09% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3111?
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-2020-3111?

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

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Source: NVD / NIST