CVE-2021-1590
published 2021-08-25CVE-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…
PriorityP430medium5.3CVSS 3.1
AVNACLPRNUINSUCNINAL
EPSS
1.35%
68.7th percentile
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
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_nx-os_software | — | — |
| cisco | nx-os | — | — |
| cisco | nx-os | — | — |
| cisco | nx-os | — | — |
| cisco | unified_computing_system | < 4.0\(4m\) | 4.0\(4m\) |
| cisco | unified_computing_system | >= 4.1 < 4.1\(3d\) | 4.1\(3d\) |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:N/A:P
vendor_cisco5.3MEDIUM
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GHSA
GHSA-g2wr-78c7-xc4v: A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker t
ghsa_unreviewed·2022-05-24
CVE-2021-1590 [MEDIUM] GHSA-g2wr-78c7-xc4v: A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker t
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.
Cisco
Cisco NX-OS Software system login block-for Denial of Service Vulnerability
vendor_cisco·2021-08-25·CVSS 5.3
CVE-2021-1590 [MEDIUM] CWE-787 Cisco NX-OS Software system login block-for Denial of Service Vulnerability
Cisco NX-OS Software system login block-for Denial of Service Vulnerability
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.
Cisco has released software updates that address this vulnerabili
Cisco
Cisco NX-OS Software system login block-for Denial of Service Vulnerability
vendor_cisco·CVSS 3.1
CVE-2021-1590 Cisco NX-OS Software system login block-for Denial of Service Vulnerability
CVE-2021-1590: Cisco NX-OS Software system login block-for Denial of Service Vulnerability
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. Cisco has released software updates that address thi
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-08-25
Published