CVE-2019-6477

Description

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).

How to fix CVE-2019-6477

To remediate CVE-2019-6477, upgrade the affected package to a fixed version below.

• —upgrade to 9.14.8-r0 or later
• —upgrade to 1:9.11.14+dfsg-1 or later

Is CVE-2019-6477 being exploited?

Moderate — EPSS is 5.7%. Track this CVE but it's not at the top of the prioritisation list.

Affected packages (2)

• from 0, < 9.14.8-r0
• from 0, < 1:9.11.14+dfsg-1

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2019-6477
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2019-6477