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Ubuntu 18.04 LTS: USN-5044-1 Critical: Bluetooth and NFC Issues

Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-5044-1 August 18, 2021 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS - Ubuntu 16.04 ESM - Ubuntu 14.04 ESM 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-azure-4.15: Linux kernel for Microsoft Azure Cloud systems - linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems - linux-kvm: Linux kernel for cloud environments - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi2: Linux kernel for Raspberry Pi (V8) systems - linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe: Linux hardware enablement (HWE) kernel - linux-azure: Linux kernel for Microsoft Azure Cloud systems Details: It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle HCI device initialization failure, leading to a double-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-3564) It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle HCI device detach events, leading to a use-after-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-3573) It was discovered that the NFC implementation in the Linux kernel did not properly handle failed connect events leading to a NULLpointer dereference. A local attacker could use this to cause a denial of service. (CVE-2021-3587) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-4.15.0-1079-oracle 4.15.0-1079.87 linux-image-4.15.0-1094-raspi2 4.15.0-1094.100 linux-image-4.15.0-1098-kvm 4.15.0-1098.100 linux-image-4.15.0-1107-gcp 4.15.0-1107.121 linux-image-4.15.0-1110-aws 4.15.0-1110.117 linux-image-4.15.0-1111-snapdragon 4.15.0-1111.120 linux-image-4.15.0-1122-azure 4.15.0-1122.135 linux-image-4.15.0-154-generic 4.15.0-154.161 linux-image-4.15.0-154-generic-lpae 4.15.0-154.161 linux-image-4.15.0-154-lowlatency 4.15.0-154.161 linux-image-aws-lts-18.04 4.15.0.1110.113 linux-image-azure-lts-18.04 4.15.0.1122.95 linux-image-gcp-lts-18.04 4.15.0.1107.126 linux-image-generic 4.15.0.154.143 linux-image-generic-lpae 4.15.0.154.143 linux-image-kvm 4.15.0.1098.94 linux-image-lowlatency 4.15.0.154.143 linux-image-oracle-lts-18.04 4.15.0.1079.89 linux-image-raspi2 4.15.0.1094.92 linux-image-snapdragon 4.15.0.1111.114 linux-image-virtual 4.15.0.154.143 Ubuntu 16.04 ESM: linux-image-4.15.0-1107-gcp 4.15.0-1107.121~16.04.1 linux-image-4.15.0-1110-aws 4.15.0-1110.117~16.04.1 linux-image-4.15.0-154-generic 4.15.0-154.161~16.04.1 linux-image-4.15.0-154-lowlatency 4.15.0-154.161~16.04.1 linux-image-aws-hwe 4.15.0.1110.101 linux-image-gcp 4.15.0.1107.108 linux-image-generic-hwe-16.04 4.15.0.154.148 linux-image-gke 4.15.0.1107.108 linux-image-lowlatency-hwe-16.04 4.15.0.154.148 linux-image-oem 4.15.0.154.148 linux-image-virtual-hwe-16.04 4.15.0.154.148 Ubuntu 14.04 ESM: linux-image-4.15.0-1122-azure 4.15.0-1122.135~14.04.1 linux-image-azure 4.15.0.1122.95 After a standard system update you needto 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-5044-1 CVE-2021-3564, CVE-2021-3573, CVE-2021-3587 Package Information: https://launchpad.net/ubuntu/+source/linux/4.15.0-154.161 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1110.117 https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1122.135 https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1107.121 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1098.100 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1079.87 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1094.100 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1111.120 . Crucial Linux kernel patch for Ubuntu resolves vulnerabilities linked to denial of service via Bluetooth and NFC connections. Essential update.. Linux Kernel Update, Ubuntu Security Notice, Bluetooth Vulnerability, NFC Issues. . Severity: Critical. LinuxSecurity.com Team

Aug 17, 2021 •Critical Ubuntu