========================================================================== Ubuntu Security Notice USN-5658-2 November 07, 2022
isc-dhcp vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 ESM Summary: Several security issues were fixed in DHCP. Software Description: - isc-dhcp: DHCP server and client Details: USN-5658-1 fixed vulnerabilities in DHCP. This update provides the corresponding updates for Ubuntu 16.04 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 16.04 ESM: isc-dhcp-client 4.3.3-5ubuntu12.10+esm2 isc-dhcp-server 4.3.3-5ubuntu12.10+esm2 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5658-2 https://ubuntu.com/security/notices/USN-5658-1 CVE-2022-2928, CVE-2022-2929
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