Vulnerability Monitor

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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).

Published

2020-02-05T18:15:10.783

Last Modified

2024-11-21T05:30:20.897

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

AV:A/AC:L/Au:N/C:C/I:C/A:C

Access Vector: ADJACENT_NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

6.5

Impact Score

10.0

Weaknesses

Type: Secondary
CWE-20
Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	ip_conference_phone_7832_firmware	< 12.7\(1\)	Yes
Operating System	cisco	ip_conference_phone_7832_with_multiplatform_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_conference_phone_7832	-	No
Operating System	cisco	ip_conference_phone_8832_firmware	< 12.7\(1\)	Yes
Operating System	cisco	ip_conference_phone_8832_with_multiplatform_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_conference_phone_8832	-	No
Operating System	cisco	ip_phone_6821_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_6821	-	No
Operating System	cisco	ip_phone_6841_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_6841	-	No
Operating System	cisco	ip_phone_6851_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_6851	-	No
Operating System	cisco	ip_phone_6861_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_6861	-	No
Operating System	cisco	ip_phone_6871_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_6871	-	No
Operating System	cisco	ip_phone_7811_firmware	< 12.7\(1\)	Yes
Operating System	cisco	ip_phone_7811_with_multiplatform_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_7811	-	No
Operating System	cisco	ip_phone_7821_firmware	< 12.7\(1\)	Yes
Operating System	cisco	ip_phone_7821_with_multiplatform_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_7821	-	No
Operating System	cisco	ip_phone_7841_firmware	< 12.7\(1\)	Yes
Operating System	cisco	ip_phone_7841_with_multiplatform_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_7841	-	No
Operating System	cisco	ip_phone_7861_firmware	< 12.7\(1\)	Yes
Operating System	cisco	ip_phone_7861_with_multiplatform_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_7861	-	No
Operating System	cisco	ip_phone_8811_firmware	< 12.7\(1\)	Yes
Operating System	cisco	ip_phone_8811_with_multiplatform_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_8811	-	No
Operating System	cisco	ip_phone_8841_firmware	< 12.7\(1\)	Yes
Operating System	cisco	ip_phone_8841_with_multiplatform_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_8841	-	No
Operating System	cisco	ip_phone_8851_firmware	< 12.7\(1\)	Yes
Operating System	cisco	ip_phone_8851_with_multiplatform_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_8851	-	No
Operating System	cisco	ip_phone_8861_firmware	< 12.7\(1\)	Yes
Operating System	cisco	ip_phone_8861_with_multiplatform_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_8861	-	No
Operating System	cisco	ip_phone_8845_firmware	< 12.7\(1\)	Yes
Operating System	cisco	ip_phone_8845_with_multiplatform_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_8845	-	No
Operating System	cisco	ip_phone_8865_firmware	< 12.7\(1\)	Yes
Operating System	cisco	ip_phone_8865_with_multiplatform_firmware	< 11.3\(1\)sr1	Yes
Hardware	cisco	ip_phone_8865	-	No
Operating System	cisco	unified_ip_conference_phone_8831_firmware	< 10.3\(1\)sr6	Yes
Hardware	cisco	unified_ip_conference_phone_8831	-	No
Operating System	cisco	unified_ip_conference_phone_8831_for_third-party_call_control_firmware	-	Yes
Hardware	cisco	unified_ip_conference_phone_8831_for_third-party_call_control	-	No
Operating System	cisco	wireless_ip_phone_8821_firmware	< 11.0\(5\)sr2	Yes
Hardware	cisco	wireless_ip_phone_8821	-	No
Operating System	cisco	wireless_ip_phone_8821-ex_firmware	< 11.0\(5\)sr2	Yes
Hardware	cisco	wireless_ip_phone_8821-ex	-	No

References

http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html Third Party Advisory, VDB Entry ([email protected])
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-voip-phones-rce-dos Vendor Advisory ([email protected])
http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-voip-phones-rce-dos Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)