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Gentoo: 202012-19 Low: PowerDNS Recursor Denial Of Service

A vulnerability in PowerDNS Recursor could lead to a Denial of Service condition.. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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 This email address is being protected from spambots. You need JavaScript enabled to view it. 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/ . - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Adviso. vulnerability, powerdns, recursor, denial, service, condition. . Severity: Low. LinuxSecurity.com Team

Dec 23, 2020 •Low Gentoo