CVE Vulnerabilities

CVE-2021-1228

Published: Feb 24, 2021 | Modified: Nov 07, 2023
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.x
3.3 LOW
AV:A/AC:L/Au:N/C:N/I:P/A:N
RedHat/V2
RedHat/V3
Ubuntu

A vulnerability in the fabric infrastructure VLAN connection establishment of Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) Mode could allow an unauthenticated, adjacent attacker to bypass security validations and connect an unauthorized server to the infrastructure VLAN. This vulnerability is due to insufficient security requirements during the Link Layer Discovery Protocol (LLDP) setup phase of the infrastructure VLAN. An attacker could exploit this vulnerability by sending a crafted LLDP packet on the adjacent subnet to an affected device. A successful exploit could allow the attacker to connect an unauthorized server to the infrastructure VLAN, which is highly privileged. With a connection to the infrastructure VLAN, the attacker can make unauthorized connections to Cisco Application Policy Infrastructure Controller (APIC) services or join other host endpoints.

Affected Software

Name Vendor Start Version End Version
Nx-os Cisco 11.0(1b) 11.0(1b)
Nx-os Cisco 11.0(1c) 11.0(1c)
Nx-os Cisco 11.0(1d) 11.0(1d)
Nx-os Cisco 11.0(1e) 11.0(1e)
Nx-os Cisco 11.0(2j) 11.0(2j)
Nx-os Cisco 11.0(2m) 11.0(2m)
Nx-os Cisco 11.0(3f) 11.0(3f)
Nx-os Cisco 11.0(3i) 11.0(3i)
Nx-os Cisco 11.0(3k) 11.0(3k)
Nx-os Cisco 11.0(3n) 11.0(3n)
Nx-os Cisco 11.0(3o) 11.0(3o)
Nx-os Cisco 11.0(4g) 11.0(4g)
Nx-os Cisco 11.0(4h) 11.0(4h)
Nx-os Cisco 11.0(4o) 11.0(4o)
Nx-os Cisco 11.0(4q) 11.0(4q)
Nx-os Cisco 11.1(1j) 11.1(1j)
Nx-os Cisco 11.1(1o) 11.1(1o)
Nx-os Cisco 11.1(1r) 11.1(1r)
Nx-os Cisco 11.1(1s) 11.1(1s)
Nx-os Cisco 11.1(2h) 11.1(2h)
Nx-os Cisco 11.1(2i) 11.1(2i)
Nx-os Cisco 11.1(3f) 11.1(3f)
Nx-os Cisco 11.1(4e) 11.1(4e)
Nx-os Cisco 11.1(4f) 11.1(4f)
Nx-os Cisco 11.1(4g) 11.1(4g)
Nx-os Cisco 11.1(4i) 11.1(4i)
Nx-os Cisco 11.1(4l) 11.1(4l)
Nx-os Cisco 11.1(4m) 11.1(4m)
Nx-os Cisco 11.2(1i) 11.2(1i)
Nx-os Cisco 11.2(1k) 11.2(1k)
Nx-os Cisco 11.2(1m) 11.2(1m)
Nx-os Cisco 11.2(2g) 11.2(2g)
Nx-os Cisco 11.2(2h) 11.2(2h)
Nx-os Cisco 11.2(2i) 11.2(2i)
Nx-os Cisco 11.2(2j) 11.2(2j)
Nx-os Cisco 11.2(3c) 11.2(3c)
Nx-os Cisco 11.2(3e) 11.2(3e)
Nx-os Cisco 11.2(3h) 11.2(3h)
Nx-os Cisco 11.2(3m) 11.2(3m)
Nx-os Cisco 11.3(1g) 11.3(1g)
Nx-os Cisco 11.3(1h) 11.3(1h)
Nx-os Cisco 11.3(1i) 11.3(1i)
Nx-os Cisco 11.3(1j) 11.3(1j)
Nx-os Cisco 11.3(2f) 11.3(2f)
Nx-os Cisco 11.3(2h) 11.3(2h)
Nx-os Cisco 11.3(2i) 11.3(2i)
Nx-os Cisco 11.3(2j) 11.3(2j)
Nx-os Cisco 11.3(2k) 11.3(2k)
Nx-os Cisco 12.0(1m) 12.0(1m)
Nx-os Cisco 12.0(1n) 12.0(1n)
Nx-os Cisco 12.0(1o) 12.0(1o)
Nx-os Cisco 12.0(1p) 12.0(1p)
Nx-os Cisco 12.0(1q) 12.0(1q)
Nx-os Cisco 12.0(1r) 12.0(1r)
Nx-os Cisco 12.0(2f) 12.0(2f)
Nx-os Cisco 12.0(2g) 12.0(2g)
Nx-os Cisco 12.0(2h) 12.0(2h)
Nx-os Cisco 12.0(2l) 12.0(2l)
Nx-os Cisco 12.0(2m) 12.0(2m)
Nx-os Cisco 12.0(2n) 12.0(2n)
Nx-os Cisco 12.0(2o) 12.0(2o)
Nx-os Cisco 12.1(1h) 12.1(1h)
Nx-os Cisco 12.1(1i) 12.1(1i)
Nx-os Cisco 12.1(2e) 12.1(2e)
Nx-os Cisco 12.1(2g) 12.1(2g)
Nx-os Cisco 12.1(2k) 12.1(2k)
Nx-os Cisco 12.1(3g) 12.1(3g)
Nx-os Cisco 12.1(3h) 12.1(3h)
Nx-os Cisco 12.1(3j) 12.1(3j)
Nx-os Cisco 12.1(4a) 12.1(4a)
Nx-os Cisco 12.2(1k) 12.2(1k)
Nx-os Cisco 12.2(1n) 12.2(1n)
Nx-os Cisco 12.2(1o) 12.2(1o)
Nx-os Cisco 12.2(2e) 12.2(2e)
Nx-os Cisco 12.2(2f) 12.2(2f)
Nx-os Cisco 12.2(2i) 12.2(2i)
Nx-os Cisco 12.2(2j) 12.2(2j)
Nx-os Cisco 12.2(2k) 12.2(2k)
Nx-os Cisco 12.2(2q) 12.2(2q)
Nx-os Cisco 12.2(3j) 12.2(3j)
Nx-os Cisco 12.2(3p) 12.2(3p)
Nx-os Cisco 12.2(3r) 12.2(3r)
Nx-os Cisco 12.2(3s) 12.2(3s)
Nx-os Cisco 12.2(3t) 12.2(3t)
Nx-os Cisco 12.2(4f) 12.2(4f)
Nx-os Cisco 12.2(4p) 12.2(4p)
Nx-os Cisco 12.2(4q) 12.2(4q)
Nx-os Cisco 12.2(4r) 12.2(4r)
Nx-os Cisco 12.3(1e) 12.3(1e)
Nx-os Cisco 12.3(1f) 12.3(1f)
Nx-os Cisco 12.3(1i) 12.3(1i)
Nx-os Cisco 12.3(1l) 12.3(1l)
Nx-os Cisco 12.3(1o) 12.3(1o)
Nx-os Cisco 12.3(1p) 12.3(1p)
Nx-os Cisco 13.0(1k) 13.0(1k)
Nx-os Cisco 13.0(2h) 13.0(2h)
Nx-os Cisco 13.0(2k) 13.0(2k)
Nx-os Cisco 13.0(2n) 13.0(2n)
Nx-os Cisco 13.1(1i) 13.1(1i)
Nx-os Cisco 13.1(2m) 13.1(2m)
Nx-os Cisco 13.1(2o) 13.1(2o)
Nx-os Cisco 13.1(2p) 13.1(2p)
Nx-os Cisco 13.1(2q) 13.1(2q)
Nx-os Cisco 13.1(2s) 13.1(2s)
Nx-os Cisco 13.1(2t) 13.1(2t)
Nx-os Cisco 13.1(2u) 13.1(2u)
Nx-os Cisco 13.1(2v) 13.1(2v)
Nx-os Cisco 13.2(1l) 13.2(1l)
Nx-os Cisco 13.2(1m) 13.2(1m)
Nx-os Cisco 13.2(2l) 13.2(2l)
Nx-os Cisco 13.2(2o) 13.2(2o)
Nx-os Cisco 13.2(3i) 13.2(3i)
Nx-os Cisco 13.2(3j) 13.2(3j)
Nx-os Cisco 13.2(3n) 13.2(3n)
Nx-os Cisco 13.2(3o) 13.2(3o)
Nx-os Cisco 13.2(3r) 13.2(3r)
Nx-os Cisco 13.2(3s) 13.2(3s)
Nx-os Cisco 13.2(4d) 13.2(4d)
Nx-os Cisco 13.2(4e) 13.2(4e)
Nx-os Cisco 13.2(5d) 13.2(5d)
Nx-os Cisco 13.2(5e) 13.2(5e)
Nx-os Cisco 13.2(5f) 13.2(5f)
Nx-os Cisco 13.2(6i) 13.2(6i)
Nx-os Cisco 13.2(7f) 13.2(7f)
Nx-os Cisco 13.2(7k) 13.2(7k)
Nx-os Cisco 13.2(8d) 13.2(8d)
Nx-os Cisco 13.2(9b) 13.2(9b)
Nx-os Cisco 13.2(9f) 13.2(9f)
Nx-os Cisco 13.2(9h) 13.2(9h)
Nx-os Cisco 13.2(41d) 13.2(41d)
Nx-os Cisco 14.0(1h) 14.0(1h)
Nx-os Cisco 14.0(2c) 14.0(2c)
Nx-os Cisco 14.0(3c) 14.0(3c)
Nx-os Cisco 14.0(3d) 14.0(3d)
Nx-os Cisco 14.1(1i) 14.1(1i)
Nx-os Cisco 14.1(1j) 14.1(1j)
Nx-os Cisco 14.1(1k) 14.1(1k)
Nx-os Cisco 14.1(1l) 14.1(1l)
Nx-os Cisco 14.1(2g) 14.1(2g)
Nx-os Cisco 14.1(2m) 14.1(2m)
Nx-os Cisco 14.1(2o) 14.1(2o)
Nx-os Cisco 14.1(2s) 14.1(2s)
Nx-os Cisco 14.1(2u) 14.1(2u)
Nx-os Cisco 14.1(2w) 14.1(2w)
Nx-os Cisco 14.1(2x) 14.1(2x)
Nx-os Cisco 14.2(1i) 14.2(1i)
Nx-os Cisco 14.2(1j) 14.2(1j)
Nx-os Cisco 14.2(1l) 14.2(1l)
Nx-os Cisco 14.2(2e) 14.2(2e)
Nx-os Cisco 14.2(2f) 14.2(2f)
Nx-os Cisco 14.2(3j) 14.2(3j)
Nx-os Cisco 14.2(3l) 14.2(3l)
Nx-os Cisco 14.2(3n) 14.2(3n)
Nx-os Cisco 14.2(3q) 14.2(3q)
Nx-os Cisco 14.2(4i) 14.2(4i)
Nx-os Cisco 14.2(4k) 14.2(4k)
Nx-os Cisco 14.2(4o) 14.2(4o)
Nx-os Cisco 14.2(4p) 14.2(4p)
Nx-os Cisco 14.2(5k) 14.2(5k)
Nx-os Cisco 15.0(1k) 15.0(1k)
Nx-os Cisco 15.0(1l) 15.0(1l)
Nx-os Cisco 15.0(2h) 15.0(2h)

References