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Ubuntu 24.04 LTS USN-6909-1 Critical: Bind Denial Of Service

Several security issues were fixed in Bind.. ========================================================================== Ubuntu Security Notice USN-6909-1 July 23, 2024 bind9 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: Several security issues were fixed in Bind. Software Description: - bind9: Internet Domain Name Server Details: It was discovered that Bind incorrectly handled a flood of DNS messages over TCP. A remote attacker could possibly use this issue to cause Bind to become unstable, resulting in a denial of service. (CVE-2024-0760) Toshifumi Sakaguchi discovered that Bind incorrectly handled having a very large number of RRs existing at the same time. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. (CVE-2024-1737) It was discovered that Bind incorrectly handled a large number of SIG(0) signed requests. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. (CVE-2024-1975) Daniel Stränger discovered that Bind incorrectly handled serving both stable cache data and authoritative zone content. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service. (CVE-2024-4076) On Ubuntu 20.04 LTS, Bind has been updated from 9.16 to 9.18. In addition to security fixes, the updated packages contain bug fixes, new features, and possibly incompatible changes. Please see the following for more information: https://kb.isc.org/docs/changes-to-be-aware-of-when-moving-from-bind-916-to-918 Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS bind9 1:9.18.28-0ubuntu0.24.04.1 Ubuntu 22.04 LTS bind9 1:9.18.28-0ubuntu0.22.04.1 Ubuntu 20.04 LTS bind9 1:9.18.28-0ubuntu0.20.04.1 This update uses a new upstream release, which includes additional bug fixes. In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-6909-1 CVE-2024-0760, CVE-2024-1737, CVE-2024-1975, CVE-2024-4076 Package Information: https://launchpad.net/ubuntu/+source/bind9/1:9.18.28-0ubuntu0.24.04.1 https://launchpad.net/ubuntu/+source/bind9/1:9.18.28-0ubuntu0.22.04.1 https://launchpad.net/ubuntu/+source/bind9/1:9.18.28-0ubuntu0.20.04.1 . Several vulnerabilities addressed in Bind for Ubuntu, impacting several LTS versions, including risks related to denial of service.. Bind Security Advisory, Ubuntu 24.04 LTS, Denial of Service Threat, Bind9 Security Fix. . Severity: Critical. LinuxSecurity.com Team

Jul 23, 2024 •Critical Ubuntu