CVE-2018-5255

Name: CVE-2018-5255
Creator: NVD / NIST
Published: 2018-03-05T18:29:00.423+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.07%

Last modified Jun 17, 2026

CVE-2018-5255 is a vulnerability of currently unknown severity. The Mlag agent in Arista EOS 4.19 before 4.19.4M and 4.20 before 4.20.2F allows remote attackers to cause a denial of service (agent restart) via crafted UDP packets.. EPSS estimates a 1.07% chance of exploitation in the next 30 days.

Description

The Mlag agent in Arista EOS 4.19 before 4.19.4M and 4.20 before 4.20.2F allows remote attackers to cause a denial of service (agent restart) via crafted UDP packets.

Metrics

EPSS Probability

1.07%

60.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Arista	Eos	>= 4.19, < 4.19.4m
Arista	Eos	>= 4.20, < 4.20.2f

References

https://www.arista.com/en/support/advisories-notices/security-advisories/4347-security-advisory-32Patch, Vendor Advisory
https://www.arista.com/en/support/advisories-notices/security-advisories/4347-security-advisory-32Patch, Vendor Advisory

Timeline

Published: Mar 5, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-5255?

The Mlag agent in Arista EOS 4.19 before 4.19.4M and 4.20 before 4.20.2F allows remote attackers to cause a denial of service (agent restart) via crafted UDP packets.

How severe is CVE-2018-5255?

Severity scoring for CVE-2018-5255 is pending analysis. The EPSS model estimates a 1.07% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5255?

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-2018-5255?

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

Scan your code now

Source: NVD / NIST