GLSA 202012-19: PowerDNS Recursor: Denial of service

http://security.gentoo.org/

Severity:	low
Title:	PowerDNS Recursor: Denial of service
Date:	12/23/2020
Bugs:	#746923
ID:	202012-19

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	Architecture(s)
net-dns/pdns-recursor	< 4.3.5	>= 4.3.5	All supported architectures

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

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202012-19.xml

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.