Cisco IOS and IOS XE Software Split DNS Denial of Service Vulnerability

A vulnerability in the Split DNS feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability occurs because the regular expression (regex) engine that is used with the Split DNS feature of affected releases may time out when it processes the DNS name list configuration. An attacker could exploit this vulnerability by trying to resolve an address or hostname that the affected device handles. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

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不正确的正则表达式

Cisco IOS 和 Cisco IOS XE Split DNS 资源管理错误漏洞

Cisco IOS和IOS XE都是美国思科（Cisco）公司的产品。CLI是其中的一个命令行界面。 Cisco IOS 和Cisco IOS XE软件的Split DNS功能存在安全漏洞，该漏洞源于对mDNS数据包的验证不正确造成的。攻击者可利用该漏洞通过尝试解析受影响的设备处理的地址或主机名，导致重新加载设备，从而导致DoS状态。

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