CVE-2021-1590
Cisco NX-OS Software Authentication DoS Vulnerability
Description
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.
INFO
Published Date :
Aug. 25, 2021, 8:15 p.m.
Last Modified :
Nov. 7, 2023, 3:28 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-1590 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-1590.
| URL | Resource |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu | Patch Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Automatic monitor github cve using Github Actions
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-1590 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-1590 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Removed CVSS V3 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Added CVSS V3.1 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L -
Initial Analysis by [email protected]
Sep. 03, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu Patch, Vendor Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration AND OR *cpe:2.3:o:cisco:nx-os:7.0\(3\)i4\(0.116\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:nx-os:7.3\(7\)n1\(1b\):*:*:*:*:*:*:* OR cpe:2.3:h:cisco:nexus_3000:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3048:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_31108pc-v:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_31108tc-v:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_31128pq:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3132c-z:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3132q-v:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3132q-x\/3132q-xl:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3164q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3172pq\/pq-xl:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3172tq-xl:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3232c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3264c-e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3264q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3408-s:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_34180yc:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3432d-s:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3464c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3524-x\/xl:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3548-x\/xl:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_36180yc-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_3636c-r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5548p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5548up:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5596t:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5596up:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_56128p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5624q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5648q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5672up:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5672up-16g:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_5696q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_6001:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_6004:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7000_10-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7000_18-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7000_4-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7000_9-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7000_supervisor_1:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7000_supervisor_2:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7000_supervisor_2e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7004:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7009:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7010:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7018:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7700:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7700_10-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7700_18-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7700_2-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7700_6-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7700_supervisor_2e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7700_supervisor_3e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7702:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7706:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7710:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_7718:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9000v:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_92160yc-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_92300yc:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_92304qc:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_92348gc-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9236c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9272q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93108tc-ex:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93108tc-ex-24:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93108tc-fx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93108tc-fx-24:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93108tc-fx3p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93120tx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93128tx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9316d-gx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93180lc-ex:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93180yc-ex:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93180yc-ex-24:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93180yc-fx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93180yc-fx-24:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93180yc-fx3:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93180yc-fx3s:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93216tc-fx2:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93240yc-fx2:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9332c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9332pq:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93360yc-fx2:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9336c-fx2:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9336c-fx2-e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9348gc-fxp:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_93600cd-gx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9364c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9364c-gx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9372px:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9372px-e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9372tx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9372tx-e:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9396px:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9396tx:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:nexus_9508:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:cisco:unified_computing_system:*:*:*:*:*:*:*:* versions up to (excluding) 4.0\(4m\) *cpe:2.3:o:cisco:unified_computing_system:*:*:*:*:*:*:*:* versions from (including) 4.1 up to (excluding) 4.1\(3d\) OR cpe:2.3:h:cisco:unified_computing_system_6248up:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:unified_computing_system_6296up:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:unified_computing_system_6324:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:unified_computing_system_6332:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:unified_computing_system_6332-16up:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-1590 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-1590
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.14 }} 0.00%
score
0.50483
percentile