CVE-2021-1590— Cisco NX-OS Software system login block-for Denial of Service Vulnerability
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I. Basic Information for CVE-2021-1590
Vulnerability Information
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Vulnerability Title
Cisco NX-OS Software system login block-for Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存写
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco NX-OS Software 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco NX-OS Software是美国思科（Cisco）公司的一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS Software 存在安全漏洞，攻击者利用该漏洞导致受影响设备拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Cisco | Cisco NX-OS Software | n/a | - |
II. Public POCs for CVE-2021-1590
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcuvendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2021-1590
Same Patch Batch · Cisco · 2021-08-25 · 15 CVEs total
| CVE-2021-1577 | 9.1 CRITICAL | Cisco Application Policy Infrastructure Controller Arbitrary File Read and Write Vulnerabi |
| CVE-2021-1578 | 8.8 HIGH | Cisco Application Policy Infrastructure Controller Privilege Escalation Vulnerability |
| CVE-2021-1588 | 8.6 HIGH | Cisco NX-OS Software MPLS OAM Denial of Service Vulnerability |
| CVE-2021-1587 | 8.6 HIGH | Cisco NX-OS Software VXLAN OAM (NGOAM) Denial of Service Vulnerability |
| CVE-2021-1586 | 8.6 HIGH | Cisco Nexus 9000 Series Fabric Switches ACI Mode Multi-Pod and Multi-Site TCP Denial of Se |
| CVE-2021-1523 | 8.6 HIGH | Cisco Nexus 9000 Series Fabric Switches ACI Mode Queue Wedge Denial of Service Vulnerabili |
| CVE-2021-1579 | 8.1 HIGH | Cisco Application Policy Infrastructure Controller App Privilege Escalation Vulnerability |
| CVE-2021-1581 | 6.5 MEDIUM | Cisco Application Policy Infrastructure Controller Command Injection and File Upload Vulne |
| CVE-2021-1580 | 6.5 MEDIUM | Cisco Application Policy Infrastructure Controller Command Injection and File Upload Vulne |
| CVE-2021-1584 | 6.0 MEDIUM | Cisco Nexus 9000 Series Fabric Switches ACI Mode Privilege Escalation Vulnerability |
| CVE-2021-1591 | 5.8 MEDIUM | Cisco Nexus 9500 Series Switches Access Control List Bypass Vulnerability |
| CVE-2021-1582 | 5.4 MEDIUM | Cisco Application Policy Infrastructure Controller Stored Cross-Site Scripting Vulnerabili |
| CVE-2021-1583 | 4.4 MEDIUM | Cisco Nexus 9000 Series Fabric Switches ACI Mode Arbitrary File Read Vulnerability |
| CVE-2021-1592 | 4.3 MEDIUM | Cisco UCS Manager Software SSH Sessions Denial of Service Vulnerability |
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V. Comments for CVE-2021-1590
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