cisco nx-os 对已超过有效生命周期的资源丧失索引

CVE编号

CVE-2021-1523

利用情况

暂无

补丁情况

N/A

披露时间

2021-08-26

漏洞描述

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.

解决建议

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-s...

受影响软件情况

#	类型	厂商	产品	版本	影响面
1
	运行在以下环境
	系统	cisco	nx-os	13.2(3n)	-
	运行在以下环境
	系统	cisco	nx-os	14.2(4i)	-
	运行在以下环境
	硬件	cisco	nexus_93120tx	-	-
	运行在以下环境
	硬件	cisco	nexus_93128tx	-	-
	运行在以下环境
	硬件	cisco	nexus_9332pq	-	-
	运行在以下环境
	硬件	cisco	nexus_9372px	-	-
	运行在以下环境
	硬件	cisco	nexus_9372px-e	-	-
	运行在以下环境
	硬件	cisco	nexus_9372tx	-	-
	运行在以下环境
	硬件	cisco	nexus_9372tx-e	-	-
	运行在以下环境
	硬件	cisco	nexus_9396px	-	-
	运行在以下环境
	硬件	cisco	nexus_9396tx	-	-

CVSS3评分 8.6

• 攻击路径 网络
• 攻击复杂度 低
• 权限要求 无
• 影响范围 已更改
• 用户交互 无
• 可用性 高
• 保密性 无
• 完整性 无

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CWE-ID	漏洞类型
CWE-772	对已超过有效生命周期的资源丧失索引

Exp相关链接

- avd.aliyun.com