- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202012-19 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Low Title: PowerDNS Recursor: Denial of service Date: December 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 ------------------------------------------------------------------- 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 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