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CVE-2020-3119

HIGHCVSS 8.8/10EPSS 5.10%

Last modified

CVE-2020-3119 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A vulnerability in the Cisco Discovery Protocol implementation for Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability exists because the Cisco Discovery Protocol parser does not properly validate input for certain fields in a Cisco Discovery Protocol message. EPSS estimates a 5.10% chance of exploitation in the next 30 days.

Description

A vulnerability in the Cisco Discovery Protocol implementation for Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability exists because the Cisco Discovery Protocol parser does not properly validate input for certain fields in a Cisco Discovery Protocol message. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. An successful exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. 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
5.10%

91.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoNx-Os>= 7.0\(3\)f2, < 9.3\(2\)
CiscoNx-Os>= 7.0\(3\)i, < 7.0\(3\)i7\(8\)
CiscoNx-Os>= 7.1, < 7.3\(6\)n1\(1\)
CiscoNx-Os< 9.3\(2\)
CiscoNx-Os>= 14.0, < 14.2\(1j\)
CiscoUcs Manager< 3.2\(3m\)
CiscoUcs Manager>= 4.0, < 4.0\(4f\)

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3119?
A vulnerability in the Cisco Discovery Protocol implementation for Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability exists because the Cisco Discovery Protocol parser does not properly validate input for certain fields in a Cisco Discovery Protocol message. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. An successful exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. 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-2020-3119?
CVE-2020-3119 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 5.10% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3119?
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-2020-3119?

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

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Source: NVD / NIST