Gentoo: GLSA-202012-19: PowerDNS Recursor: Denial of service

Date 23 Dec 2020

Category Gentoo Linux Distribution - Security Advisories

417

Posted By LinuxSecurity Advisories

A vulnerability in PowerDNS Recursor could lead to a Denial of Service condition.

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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
This email address is being protected from spambots. You need JavaScript enabled to view it. 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