Input validation error in Arista Extensible Operating System (EOS) - CVE-2019-18948
Published: April 16, 2020 / Updated: May 17, 2025
Vulnerability identifier: #VU34459
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-18948
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an error in VxLAN implementation when handling ARP traffic. A remote attacker on the local network can send specially crafted ARP packets to the device and perform a denial of service (DoS) attack.
Affected software
Arista Extensible Operating System (EOS)
How to mitigate CVE-2019-18948
Install update from vendor's website.
Arista Extensible Operating System (EOS) - addressed in versions 4.21.9M, 4.22.4M, 4.23.2F