Test ID:	1.3.6.1.4.1.25623.1.1.12.2024.7047.1
Category:	Ubuntu Local Security Checks
Title:	Ubuntu: Security Advisory (USN-7047-1)
Summary:	The remote host is missing an update for the 'knot-resolver' package(s) announced via the USN-7047-1 advisory.
Description:	Summary: The remote host is missing an update for the 'knot-resolver' package(s) announced via the USN-7047-1 advisory. Vulnerability Insight: Vladimir Cunat discovered that Knot Resolver incorrectly handled input during DNSSEC validation. A remote attacker could possibly use this issue to bypass certain validations. (CVE-2019-10190) Vladimir Cunat discovered that Knot Resolver incorrectly handled input during DNSSEC validation. A remote attacker could possibly use this issue to downgrade DNSSEC-secure domains to a DNSSEC-insecure state, resulting in a domain hijacking attack. (CVE-2019-10191) Vladimir Cunat discovered that Knot Resolver incorrectly handled certain DNS replies with many resource records. An attacker could possibly use this issue to consume system resources, resulting in a denial of service. (CVE-2019-19331) Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Knot Resolver incorrectly handled certain queries. A remote attacker could use this issue to perform an amplification attack directed at a target. (CVE-2020-12667) Affected Software/OS: 'knot-resolver' package(s) on Ubuntu 20.04. Solution: Please install the updated package(s). CVSS Score: 5.0 CVSS Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2019-10190 FEDORA-2019-20f95b0b39 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/ FEDORA-2019-fdb50c675d https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/ https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190 https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html Common Vulnerability Exposure (CVE) ID: CVE-2019-10191 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10191 Common Vulnerability Exposure (CVE) ID: CVE-2019-19331 https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html Common Vulnerability Exposure (CVE) ID: CVE-2020-12667 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/ http://cyber-security-group.cs.tau.ac.il/# https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/ http://www.openwall.com/lists/oss-security/2020/05/19/2
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