CVE-2021-1590
A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a…
Impact
A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a login process to unexpectedly restart, causing a denial of service (DoS) condition. This vulnerability is due to a logic error in the implementation of the system login block-for command when an attack is detected and acted upon. An attacker could exploit this vulnerability by performing a brute-force login attack on an affected device. A successful exploit could allow the attacker to cause a login process to reload, which could result in a delay during authentication to the affected device.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cisco | Nx-Os | Versions 7.0\(3\)i4\(0.116\), 7.3\(7\)n1\(1b\) |
| Cisco | Unified Computing System | before 4.0\(4m\) from 4.1 before 4.1\(3d\) |