Ubuntu alert USN-5658-3 (isc-dhcp)
From: | "Leonidas S. Barbosa" <leo.barbosa@canonical.com> | |
To: | ubuntu-security-announce@lists.ubuntu.com | |
Subject: | [USN-5658-3] DHCP vulnerabilities | |
Date: | Mon, 21 Nov 2022 16:15:32 -0300 | |
Message-ID: | <20221121191532.GA3758683@d4rkl41n> |
========================================================================== Ubuntu Security Notice USN-5658-3 November 21, 2022 isc-dhcp vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 ESM Summary: Several security issues were fixed in DHCP. Software Description: - isc-dhcp: DHCP server and client Details: USN-5658-1 fixed several vulnerabilities in DHCP. This update provides the corresponding update for Ubuntu 14.04 ESM. Original advisory details: It was discovered that DHCP incorrectly handled option reference counting. A remote attacker could possibly use this issue to cause DHCP servers to crash, resulting in a denial of service. (CVE-2022-2928) It was discovered that DHCP incorrectly handled certain memory operations. A remote attacker could possibly use this issue to cause DHCP clients and servers to consume resources, leading to a denial of service. (CVE-2022-2929) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM: isc-dhcp-client 4.2.4-7ubuntu12.13+esm2 isc-dhcp-server 4.2.4-7ubuntu12.13+esm2 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5658-3 https://ubuntu.com/security/notices/USN-5658-1 CVE-2022-2928, CVE-2022-2929