CVE-2021-1368— Cisco FXOS Software and Cisco NX-OS Software 缓冲区错误漏洞
一分钟漏洞结论
影响对象
Cisco Cisco NX-OS Software
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Cisco NX-OS Software和Cisco FXOS Software都是美国思科（Cisco）公司的产品。Cisco NX-OS Software是一套交换机使用的数据中心级操作系统软件。Cisco FXOS Software是一套运行在思科安全设备中的防火墙软件。 Cisco FXOS Software and Cisco NX-OS Software 存在安全漏洞，该漏洞输入验证不足造成的。
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一、 漏洞 CVE-2021-1368 基础信息
漏洞信息
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Vulnerability Title
Cisco FXOS and NX-OS Software Unidirectional Link Detection Denial of Service and Arbitrary Code Execution Vulnerability
来源: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Unidirectional Link Detection (UDLD) feature of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code with administrative privileges or cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted Cisco UDLD protocol packets to a directly connected, affected device. A successful exploit could allow the attacker to execute arbitrary code with administrative privileges or cause the Cisco UDLD process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition. Note: The UDLD feature is disabled by default, and the conditions to exploit this vulnerability are strict. The attacker needs full control of a directly connected device. That device must be connected over a port channel that has UDLD enabled. To trigger arbitrary code execution, both the UDLD-enabled port channel and specific system conditions must exist. In the absence of either the UDLD-enabled port channel or the system conditions, attempts to exploit this vulnerability will result in a DoS condition. It is possible, but highly unlikely, that an attacker could control the necessary conditions for exploitation. The CVSS score reflects this possibility. However, given the complexity of exploitation, Cisco has assigned a Medium Security Impact Rating (SIR) to this vulnerability.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
来源: CVE Program / CVE List V5
Vulnerability Title
Cisco FXOS Software and Cisco NX-OS Software 缓冲区错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Cisco NX-OS Software和Cisco FXOS Software都是美国思科（Cisco）公司的产品。Cisco NX-OS Software是一套交换机使用的数据中心级操作系统软件。Cisco FXOS Software是一套运行在思科安全设备中的防火墙软件。 Cisco FXOS Software and Cisco NX-OS Software 存在安全漏洞，该漏洞输入验证不足造成的。
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 Software | n/a | - |
|
二、漏洞 CVE-2021-1368 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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CVE-2021-1368 厂商安全公告 (1)
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-udld-rce-xetH6w35 vendor-advisory x_refsource_CISCO
同批安全公告 · Cisco · 2021-02-24 · 共 13 条
| CVE-2021-1388 | 10.0 CRITICAL | Cisco ACI Multi-Site Orchestrator 安全漏洞 |
| CVE-2021-1361 | 9.8 CRITICAL | Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches 安全漏洞 |
| CVE-2021-1393 | 9.8 CRITICAL | Cisco Application Services Engine 访问控制错误漏洞 |
| CVE-2021-1396 | 9.8 CRITICAL | Cisco Application Services Engine 访问控制错误漏洞 |
| CVE-2021-1230 | 8.6 HIGH | Cisco Nexus 9000 Series Fabric Switches 安全漏洞 |
| CVE-2021-1387 | 8.6 HIGH | Cisco NX-OS Software 安全漏洞 |
| CVE-2021-1228 | 7.4 HIGH | Cisco Application Policy Infrastructure Controller和Cisco Nexus 9000 Series Fabric Switches |
| CVE-2021-1229 | 5.8 MEDIUM | Cisco NX-OS Software 安全漏洞 |
| CVE-2021-1450 | 5.5 MEDIUM | Cisco Anyconnect Secure Mobility Client 输入验证错误漏洞 |
| CVE-2021-1231 | 4.7 MEDIUM | Cisco Nexus 9000 Series Fabric 访问控制错误漏洞 |
| CVE-2021-1367 | 4.3 MEDIUM | Cisco NX-OS Software 输入验证错误漏洞 |
| CVE-2021-1227 | Cisco NX-OS Software 跨站请求伪造漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2021-1368
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