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Alpine Linux: CVE-2019-19331: knot-resolver DNS packets taking few seconds to process with full CPU utilization leads to DoS

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Alpine Linux: CVE-2019-19331: knot-resolver DNS packets taking few seconds to process with full CPU utilization leads to DoS

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
12/16/2019
Created
05/09/2020
Added
05/08/2020
Modified
05/08/2020

Description

knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB).

Solution(s)

  • alpine-linux-upgrade-knot-resolver

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