CVE-2017-6627 Cisco IOS and IOS XE Software UDP Packet Processing Denial of Service Vulnerability (cisco-sa-20170906-ios-udp)

漏洞类别:Cisco

漏洞等级:

漏洞信息

A vulnerability in the UDP processing code of Cisco IOS and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface queue wedge and a denial of service condition.
The vulnerability is due to Cisco IOS Software application changes that create UDP sockets and leave the sockets idle without closing them.

漏洞危害

An attacker could exploit this vulnerability by sending UDP packets with a destination port of 0 to an affected device. A successful exploit could allow the attacker to cause UDP packets to be held in the input interfaces queue, resulting in a DoS condition. The input interface queue will stop holding UDP packets when it receives 250 packets.

解决方案

Refer to Cisco advisory cisco-sa-20170906-ios-udp for updates and patch information.

Patch:
Following are links for downloading patches to fix the vulnerabilities:

cisco-sa-20170906-snmp: CISCO IOS

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