Cisco IP Phones 7800 and 8800 Series Cisco Discovery Protocol and Link Layer Discovery Protocol Denial of Service (CVE-2019-1684)

medium Tenable OT Security Plugin ID 502124

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability in the Cisco Discovery Protocol or Link Layer Discovery Protocol (LLDP) implementation for the Cisco IP Phone 7800 and 8800 Series could allow an unauthenticated, adjacent attacker to cause an affected phone to reload unexpectedly, resulting in a temporary denial of service (DoS) condition. The vulnerability is due to missing length validation of certain Cisco Discovery Protocol or LLDP packet header fields. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol or LLDP packet to the targeted phone. A successful exploit could allow the attacker to cause the affected phone to reload unexpectedly, resulting in a temporary DoS condition. Versions prior to 12.6(1)MN80 are affected.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

Plugin Details

Severity: Medium

ID: 502124

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 3/18/2024

Updated: 3/18/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

Vector: CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2019-1684

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ip_phone_7800_firmware, cpe:/o:cisco:ip_phone_7811_firmware, cpe:/o:cisco:ip_phone_7821_firmware, cpe:/o:cisco:ip_phone_7841_firmware, cpe:/o:cisco:ip_phone_7861_firmware, cpe:/o:cisco:ip_phone_8800_firmware, cpe:/o:cisco:ip_phone_8811_firmware, cpe:/o:cisco:ip_phone_8841_firmware, cpe:/o:cisco:ip_phone_8845_firmware, cpe:/o:cisco:ip_phone_8851_firmware, cpe:/o:cisco:ip_phone_8861_firmware, cpe:/o:cisco:ip_phone_8865_firmware

Required KB Items: Tenable.ot/Cisco

Exploit Ease: No known exploits are available

Patch Publication Date: 2/21/2019

Vulnerability Publication Date: 2/21/2019

Reference Information

CVE: CVE-2019-1684

CWE: 119

Detections

Analytics