This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2019-19331 →

DEBIAN-CVE-2019-19331

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...

Original description

The description as published by the source.

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).

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 knot-resolver

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.1-1"}]}]

Debian:13 knot-resolver

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.1-1"}]}]

Debian:14 knot-resolver

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.1-1"}]}]

References

advisory security-tracker.debian.org