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CVE-2019-1684

MEDIUMCVSS 6.5/10EPSS 0.64%

Last modified

CVE-2019-1684 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.64% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
6.5/10

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

EPSS Probability
0.64%

46.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIp Phone 8800 Firmware< 12.6\(1\)mn80
CiscoIp Phone 7800 Firmware< 12.6\(1\)mn80
CiscoIp Conference Phone 7832 Firmware< 12.6\(1\)mn80
CiscoIp Conference Phone 8832 Firmware< 12.6\(1\)mn80
CiscoIp Phone 7811 Firmware< 12.6\(1\)mn80
CiscoIp Phone 7821 Firmware< 12.6\(1\)mn80
CiscoIp Phone 7841 Firmware< 12.6\(1\)mn80
CiscoIp Phone 7861 Firmware< 12.6\(1\)mn80
CiscoIp Phone 8811 Firmware< 12.6\(1\)mn80
CiscoIp Phone 8841 Firmware< 12.6\(1\)mn80
CiscoIp Phone 8845 Firmware< 12.6\(1\)mn80
CiscoIp Phone 8851 Firmware< 12.6\(1\)mn80
CiscoIp Phone 8861 Firmware< 12.6\(1\)mn80
CiscoIp Phone 8865 Firmware< 12.6\(1\)mn80

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-1684?
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.
How severe is CVE-2019-1684?
CVE-2019-1684 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.
How do I fix CVE-2019-1684?
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.

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Source: NVD / NIST