关键漏洞信息 漏洞名称: Cisco IOS XE Software for Network Convergence System 520 Routers Denial of Service Vulnerability 严重程度: Medium CVE编号: CVE-2021-1394 CWE编号: CWE-399 CVSS评分: Base 5.3 Cisco Bug ID: CSCvm96192 发布日期: 2021 March 24 16:00 GMT 漏洞描述 A vulnerability in the ingress traffic manager of Cisco IOS XE Software for Cisco Network Convergence System (NCS) 520 Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition in the web management interface of an affected device. The vulnerability is due to incorrect processing of certain IPv4 TCP traffic that is destined to an affected device. An attacker could exploit this vulnerability by sending a large number of crafted TCP packets to the affected device. A successful exploit could allow the attacker to cause the web management interface to become unavailable, resulting in a DoS condition. 影响产品 Cisco NCS 520 Routers if they were running a vulnerable release of Cisco IOS XE Software and had the HTTP server enabled. 解决方案 补丁软件: Cisco has released software updates that address this vulnerability. 工具: Cisco Software Checker to determine exposure and fixed software release.