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Gentoo Linux Security Advisory GLSA 202012-19
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https://security.gentoo.org/
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Severity: Low
Title: PowerDNS Recursor: Denial of service
Date: December 23, 2020
Bugs: #746923
ID: 202012-19
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Synopsis
========
A vulnerability in PowerDNS Recursor could lead to a Denial of Service
condition.
Background
==========
PowerDNS Recursor is a high-end, high-performance resolving name
server.
Affected packages
=================
——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 net-dns/pdns-recursor < 4.3.5 >= 4.3.5
Description
===========
It was discovered that it was possible to update the DNSSEC validation
state to a bogus state for a cached record via DNS ANY query.
Impact
======
A remote attacker could send specially crafted DNS queries to deny
DNSSEC validation.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All PowerDNS Recursor users should upgrade to the latest version:
# emerge –sync
# emerge –ask –oneshot –verbose “>=net-dns/pdns-recursor-4.3.5”
References
==========
[ 1 ] CVE-2020-25829
https://nvd.nist.gov/vuln/detail/CVE-2020-25829
[ 2 ] PowerDNS Security Advisory 2020-07
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.html
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202012-19
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users’ machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.
License
=======
Copyright 2020 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons – Attribution / Share Alike license.
https://creativecommons.org/licenses/by-sa/2.5
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