Today we are releasing PowerDNS Recursor 4.3.5, 4.2.5. and 4.1.18, containing a security fix for CVE-2020-25829:
An issue has been found in PowerDNS Recursor where a remote attacker can cause the cached records for a given name to be updated to the
Bogus DNSSEC validation state, instead of their actual DNSSEC
Secure state, via a DNS ANY query. This results in a denial of service for installations that always validate (
dnssec=validate) and for clients requesting validation when on-demand validation is enabled (
dnssec=process). The severity is high for these cases.
As usual, there were also other smaller enhancements and bugfixes. Please refer to the 4.3.5 changelog, 4.2.5 changelog and 4.1.18 changelog for details.
The 4.3.5 tarball (signature), 4.2.5 tarball (signature) and 4.1.18 tarball (signature) are available at downloads.powerdns.com and packages for CentOS 6, 7 and 8, Debian Stretch and Buster, Ubuntu Xenial and Bionic are available from repo.powerdns.com.
4.0 and older releases are EOL, refer to the documentation for details about our release cycles.
Please send us all feedback and issues you might have via the mailing list, or in case of a bug, via GitHub.