Mailing List Archive

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 202012-18
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Low
Title: PowerDNS: information disclosure
Date: December 23, 2020
Bugs: #744160
ID: 202012-18

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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