漏洞类别：Cisco
漏洞等级： 
漏洞信息
The DHCP relay subsystem of Cisco IOS and Cisco IOS XE Software contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code and gain full control of an affected system. The attacker could also cause an affected system to reload, resulting in a denial of service condition.
The vulnerability is due to a buffer overflow condition in the DHCP relay subsystem of the affected software.
漏洞危害
An attacker could exploit this vulnerability by sending a crafted DHCP Version 4 (DHCPv4) packet to an affected system. A successful exploit could allow the attacker to execute arbitrary code and gain full control of the affected system or cause the affected system to reload, resulting in a DoS condition.
解决方案
Refer to Cisco advisory cisco-sa-20170927-dhcp for updates and patch information.
Patch:
Following are links for downloading patches to fix the vulnerabilities:
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