Input validation error in Cisco Nexus 9000 Series Switches in ACI Mode - CVE-2021-1230
Published: February 25, 2021
Vulnerability identifier: #VU50939
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1230
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an issue with the installation of routes upon receipt of the Border Gateway Protocol (BGP) update. A remote attacker can send a specially crafted BGP update to the affected device and perform a denial of service (DoS) attack.
Affected software
Cisco Nexus 9000 Series Switches in ACI Mode
How to mitigate CVE-2021-1230
Install updates from vendor's website.
Cisco Nexus 9000 Series Switches in ACI Mode - addressed in versions 14.2.3j, 14.2.3l, 14.2.3n, 14.2.3q, 14.2.4i, 14.2.4k, 14.2.4o, 14.2.4p, 14.2.5k, 14.2.5l, 14.2.5n, 14.2.6d, 14.2.6g, 14.2.6h, 15.0.1k, 15.0.1l, 15.0.2e, 15.0.2h, 15.1.1h, 15.1.2e, 15.1.3e