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Gentoo Linux Security Advisory                           GLSA 202012-18
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                                            https://security.gentoo.org/
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  Severity: Low
     Title: PowerDNS: information disclosure
      Date: December 23, 2020
      Bugs: #744160
        ID: 202012-18

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Synopsis
=======
An information disclosure vulnerability in PowerDNS allow remote
attackers to obtain sensitive information.

Background
=========
The PowerDNS nameserver is an authoritative-only nameserver which uses
a flexible backend architecture.

Affected packages
================
     -------------------------------------------------------------------
      Package              /     Vulnerable     /            Unaffected
     -------------------------------------------------------------------
   1  net-dns/pdns                 < 4.3.1                    >= 4.3.1

Description
==========
It was discovered that PowerDNS did not properly handle certain unknown
records.

Impact
=====
An authorized attacker with the ability to insert crafted records into
a zone might be able to leak the content of uninitialized memory.
Crafted records cannot be inserted via AXFR.

Workaround
=========
Do not take zone data from untrusted users.

Resolution
=========
All PowerDNS users should upgrade to the latest version:

   # emerge --sync
   # emerge --ask --oneshot --verbose ">=net-dns/pdns-4.3.1"

References
=========
[ 1 ] CVE-2020-17482
       https://nvd.nist.gov/vuln/detail/CVE-2020-17482
[ 2 ] PowerDNS Security Advisory 2020-05
 
https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2020-05.html

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  https://security.gentoo.org/glsa/202012-18

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/