========================================================================== Ubuntu Security Notice USN-5984-1 March 29, 2023 linux, linux-aws, linux-dell300x, linux-kvm, linux-oracle, linux-raspi2 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-dell300x: Linux kernel for Dell 300x platforms - linux-kvm: Linux kernel for cloud environments - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi2: Linux kernel for Raspberry Pi systems Details: It was discovered that the System V IPC implementation in the Linux kernel did not properly handle large shared memory counts. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3669) It was discovered that a use-after-free vulnerability existed in the SGI GRU driver in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-3424) Ziming Zhang discovered that the VMware Virtual GPU DRM driver in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2022-36280) Hyunwoo Kim discovered that the DVB Core driver in the Linux kernel did not properly perform reference counting in some situations, leading to a use- after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-41218) It was discovered that the network queuing discipline implementation in the Linux kernel contained a null pointer dereference in some situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2022-47929) José Oliveira and Rodrigo Branco discovered that the prctl syscall implementation in the Linux kernel did not properly protect against indirect branch prediction attacks in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2023-0045) It was discovered that a use-after-free vulnerability existed in the Advanced Linux Sound Architecture (ALSA) subsystem. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-0266) Kyle Zeng discovered that the IPv6 implementation in the Linux kernel contained a NULL pointer dereference vulnerability in certain situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-0394) Kyle Zeng discovered that the ATM VC queuing discipline implementation in the Linux kernel contained a type confusion vulnerability in some situations. An attacker could use this to cause a denial of service (system crash). (CVE-2023-23455) It was discovered that the RNDIS USB driver in the Linux kernel contained an integer overflow vulnerability. A local attacker with physical access could plug in a malicious USB device to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-23559) Wei Chen discovered that the DVB USB AZ6027 driver in the Linux kernel contained a null pointer dereference when handling certain messages from user space. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-28328) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-4.15.0-1062-dell300x 4.15.0-1062.67 linux-image-4.15.0-1116-oracle 4.15.0-1116.127 linux-image-4.15.0-1129-raspi2 4.15.0-1129.137 linux-image-4.15.0-1137-kvm 4.15.0-1137.142 linux-image-4.15.0-1153-aws 4.15.0-1153.166 linux-image-4.15.0-208-generic 4.15.0-208.220 linux-image-4.15.0-208-generic-lpae 4.15.0-208.220 linux-image-4.15.0-208-lowlatency 4.15.0-208.220 linux-image-aws-lts-18.04 4.15.0.1153.151 linux-image-dell300x 4.15.0.1062.61 linux-image-generic 4.15.0.208.191 linux-image-generic-lpae 4.15.0.208.191 linux-image-kvm 4.15.0.1137.128 linux-image-lowlatency 4.15.0.208.191 linux-image-oracle-lts-18.04 4.15.0.1116.121 linux-image-raspi2 4.15.0.1129.124 linux-image-virtual 4.15.0.208.191 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-5984-1 CVE-2021-3669, CVE-2022-3424, CVE-2022-36280, CVE-2022-41218, CVE-2022-47929, CVE-2023-0045, CVE-2023-0266, CVE-2023-0394, CVE-2023-23455, CVE-2023-23559, CVE-2023-28328 Package Information: https://launchpad.net/ubuntu/+source/linux/4.15.0-208.220 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1153.166 https://launchpad.net/ubuntu/+source/linux-dell300x/4.15.0-1062.67 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1137.142 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1116.127 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1129.137