CVE-2021-1523— Cisco Nexus 9000 Series Fabric Switches 输入验证错误漏洞
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一、 漏洞 CVE-2021-1523 基础信息
漏洞信息
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Vulnerability Title
Cisco Nexus 9000 Series Fabric Switches ACI Mode Queue Wedge Denial of Service Vulnerability
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
A vulnerability in Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) Mode could allow an unauthenticated, remote attacker to cause a queue wedge on a leaf switch, which could result in critical control plane traffic to the device being dropped. This could result in one or more leaf switches being removed from the fabric. This vulnerability is due to mishandling of ingress TCP traffic to a specific port. An attacker could exploit this vulnerability by sending a stream of TCP packets to a specific port on a Switched Virtual Interface (SVI) configured on the device. A successful exploit could allow the attacker to cause a specific packet queue to queue network buffers but never process them, leading to an eventual queue wedge. This could cause control plane traffic to be dropped, resulting in a denial of service (DoS) condition where the leaf switches are unavailable. Note: This vulnerability requires a manual intervention to power-cycle the device to recover.
来源: 美国国家漏洞数据库 NVD
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
对已超过有效生命周期的资源丧失索引
来源: 美国国家漏洞数据库 NVD
Vulnerability Title
Cisco Nexus 9000 Series Fabric Switches 输入验证错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Cisco Nexus 9000 Series Fabric Switches是美国思科（Cisco）公司的一款9000系列光纤交换机。 Cisco Nexus 9000 Series Fabric Switches 中存在输入验证错误漏洞，该漏洞源于产品对特定端口的TCP流量处理不当。攻击者可通过向交换机的 Switched Virtual Interface 端口发送特质数据包引发漏洞。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Cisco | Cisco NX-OS System Software in ACI Mode | n/a | - |
二、漏洞 CVE-2021-1523 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2021-1523 厂商安全公告 (1)
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n9kaci-queue-wedge-cLDDEfKFvendor-advisoryx_refsource_CISCO
同批安全公告 · Cisco · 2021-08-25 · 共 15 条
| CVE-2021-1577 | 9.1 CRITICAL | Cisco Application Policy Infrastructure Controller 安全漏洞 |
| CVE-2021-1578 | 8.8 HIGH | Cisco Application Policy Infrastructure Controller 访问控制错误漏洞 |
| CVE-2021-1588 | 8.6 HIGH | Cisco NX-OS Software 缓冲区错误漏洞 |
| CVE-2021-1587 | 8.6 HIGH | Cisco NX-OS Software 输入验证错误漏洞 |
| CVE-2021-1586 | 8.6 HIGH | Cisco Nexus 9000 Series Fabric Switches 数据伪造问题漏洞 |
| CVE-2021-1579 | 8.1 HIGH | Cisco Application Policy Infrastructure Controller 授权问题漏洞 |
| CVE-2021-1581 | 6.5 MEDIUM | Cisco Application Policy Infrastructure Controller 安全漏洞 |
| CVE-2021-1580 | 6.5 MEDIUM | Cisco Application Policy Infrastructure Controller 命令注入漏洞 |
| CVE-2021-1584 | 6.0 MEDIUM | Cisco Nexus 9000 Series Fabric Switches 操作系统命令注入漏洞 |
| CVE-2021-1591 | 5.8 MEDIUM | Cisco Nexus 9500 Series Switches 安全漏洞 |
| CVE-2021-1582 | 5.4 MEDIUM | Cisco Application Policy Infrastructure Controller 跨站脚本漏洞 |
| CVE-2021-1590 | 5.3 MEDIUM | Cisco NX-OS Software 安全漏洞 |
| CVE-2021-1583 | 4.4 MEDIUM | Cisco Nexus 9000 Series Fabric Switches 安全漏洞 |
| CVE-2021-1592 | 4.3 MEDIUM | Cisco UCS Manager 资源管理错误漏洞 |
IV. Related Vulnerabilities
Same product: Cisco NX-OS System Software in ACI Mode
V. Comments for CVE-2021-1523
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