high
8.8
CWE
20
Advisory Published
Updated

CVE-2020-3111: Cisco IP Phone Remote Code Execution and Denial of Service Vulnerability

First published: Wed Feb 05 2020(Updated: )

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).

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco IP Conference Phone 7832 Firmware<12.7\(1\)
Cisco IP Conference Phone 7832<11.3\(1\)sr1
Cisco IP Conference Phone 7832 Firmware
Cisco IP Conference Phone 8832<12.7\(1\)
Cisco IP Conference Phone 8832 with Multiplatform Firmware<11.3\(1\)sr1
Cisco IP Conference Phone 8832 Firmware
Cisco IP Phone 6821 firmware<11.3\(1\)sr1
Cisco IP Phone 6821 firmware
Cisco IP Phone 6841 firmware<11.3\(1\)sr1
Cisco IP Phone 6841 firmware
Cisco IP Phone 6851<11.3\(1\)sr1
Cisco IP Phone 6851
cisco ip phone 6861 firmware<11.3\(1\)sr1
cisco ip phone 6861
Cisco IP Phone 6871 firmware<11.3\(1\)sr1
Cisco IP Phone 6871 firmware
Cisco IP Phone 7811 firmware<12.7\(1\)
Cisco IP Phone 7811 with Multiplatform Firmware<11.3\(1\)sr1
Cisco IP Phone 7811 firmware
Cisco IP Phone 7821 firmware<12.7\(1\)
Cisco IP Phone 7821 with Multiplatform Firmware<11.3\(1\)sr1
Cisco IP Phone 7821 firmware
Cisco IP Phone 7841 firmware<12.7\(1\)
Cisco IP Phone 7841 with Multiplatform Firmware<11.3\(1\)sr1
Cisco IP Phone 7841 firmware
Cisco IP Phone 7861 firmware<12.7\(1\)
Cisco IP Phone 7861 with Multiplatform Firmware<11.3\(1\)sr1
Cisco IP Phone 7861 firmware
Cisco IP Phone 8811 firmware<12.7\(1\)
Cisco IP Phone 8811<11.3\(1\)sr1
Cisco IP Phone 8811 firmware
Cisco IP Phone 8841 firmware<12.7\(1\)
Cisco IP Phone 8841<11.3\(1\)sr1
Cisco IP Phone 8841 firmware
Cisco IP Phone 8851 firmware<12.7\(1\)
Cisco IP Phone 8851<11.3\(1\)sr1
Cisco IP Phone 8851 firmware
cisco ip phone 8861 firmware<12.7\(1\)
Cisco IP Phone 8861 with Multiplatform Firmware<11.3\(1\)sr1
Cisco IP Phone 8861 Firmware 3PCC
Cisco IP Phone 8845 firmware<12.7\(1\)
Cisco IP Phone 8845<11.3\(1\)sr1
Cisco IP Phone 8845 firmware
cisco ip phone 8865 firmware<12.7\(1\)
Cisco IP Phone 8865 with Multiplatform Firmware<11.3\(1\)sr1
cisco ip phone 8865
Cisco Unified IP Conference Phone 8831<10.3\(1\)sr6
Cisco Unified IP Conference Phone 8831 for Third-Party Call Control
Cisco Unified IP Conference Phone 8831
Cisco Unified IP Conference Phone 8831
Cisco Wireless IP Phone 8821-EX firmware<11.0\(5\)sr2
Cisco Wireless IP Phone 8821-EX
Cisco Wireless IP Phone 8821-EX firmware<11.0\(5\)sr2
Cisco Wireless IP Phone 8821-EX firmware

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is CVE-2020-3111.

  • What is the severity of CVE-2020-3111?

    The severity of CVE-2020-3111 is high with a CVSS score of 8.8.

  • What is the affected software for CVE-2020-3111?

    The affected software for CVE-2020-3111 includes various Cisco IP Phone models with specific firmware versions.

  • How can an attacker exploit CVE-2020-3111?

    An attacker can exploit CVE-2020-3111 by sending maliciously crafted packets to an affected Cisco IP Phone.

  • What is the recommended mitigation for CVE-2020-3111?

    The recommended mitigation for CVE-2020-3111 is to apply the necessary security updates provided by Cisco.

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