TCP-pipelined queries can bypass tcp-clients limit

With pipelining enabled each incoming query on a TCP connection requires a similar resource allocation to a query received via UDP or via TCP without pipelining enabled. A client using a TCP-pipelined connection to a server could consume more resources than the server has been provisioned to handle. When a TCP connection with a large number of pipelined queries is closed, the load on the server releasing these multiple resources can cause it to become unresponsive, even for queries that can be answered authoritatively or from cache. (This is most likely to be perceived as an intermittent server problem).

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

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ISC BIND 资源管理错误漏洞

ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND中存在资源管理错误漏洞。远程攻击者可利用该漏洞绕过tcp-clients限制，导致服务器无法响应（消耗所有可用资源）。

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