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172
security advisoryubuntumemory exposureUbuntu 16.04 LTS USN-3597-2 Moderate: Kernel HWE Security Update
Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-3597-2 March 15, 2018 linux-hwe vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-hwe: Linux hardware enablement (HWE) kernel Details: USN-3597-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.10. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 17.10 for Ubuntu 16.04 LTS. USNS 3541-2 and 3523-2 provided mitigations for Spectre and Meltdown (CVE-2017-5715, CVE-2017-5753, CVE-2017-5754) for the i386, amd64, and ppc64el architectures for Ubuntu 16.04 LTS. This update provides the corresponding mitigations for the arm64 architecture. Original advisory details: Jann Horn discovered that microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Meltdown. A local attacker could use this to expose sensitive information, including kernel memory. (CVE-2017-5754) Jann Horn discovered that microprocessors utilizing speculative execution and branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Spectre. A local attacker could use this to expose sensitive information, including kernel memory. (CVE-2017-5715, CVE-2017-5753) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: linux-image-4.13.0-37-generic 4.13.0-37.42~16.04.1 linux-image-4.13.0-37-generic-lpae 4.13.0-37.42~16.04.1 linux-image-4.13.0-37-lowlatency 4.13.0-37.42~16.04.1 linux-image-generic-hwe-16.04 4.13.0.37.56 linux-image-generic-lpae-hwe-16.04 4.13.0.37.56 linux-image-lowlatency-hwe-16.04 4.13.0.37.56 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-3597-2, https://ubuntu.com/security/notices/USN-3597-1, https://ubuntu.com/security/notices/USN-3523-2, https://ubuntu.com/security/notices/USN-3541-2, CVE-2017-5715, CVE-2017-5753, CVE-2017-5754 Package Information: https://launchpad.net/ubuntu/+source/linux-hwe/4.13.0-37.42~16.04.1 . Ubuntu 20.04 LTS Linux kernel upgrade resolves HWE vulnerabilities and safeguards systems against Spectre and Meltdown weaknesses.. Ubuntu Kernel Update, HWE Mitigation, Spectre Fix, Meltdown Patch. . LinuxSecurity.com Team
Mar 15, 2018
Ubuntu
172
security advisorymoderatedenial of serviceUbuntu 16.04: USN-3404-2 Moderate: HWE Kernel Crash Risk
The system could be made to crash under certain conditions.. =========================================================================Ubuntu Security Notice USN-3404-2 August 28, 2017 linux-hwe vulnerability ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS Summary: The system could be made to crash under certain conditions. Software Description: - linux-hwe: Linux hardware enablement (HWE) kernel Details: USN-3404-1 fixed a vulnerability in the Linux kernel for Ubuntu 17.04. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 17.04 for Ubuntu 16.04 LTS. A reference count bug was discovered in the Linux kernel ipx protocol stack. A local attacker could exploit this flaw to cause a denial of service or possibly other unspecified problems. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: linux-image-4.10.0-33-generic 4.10.0-33.37~16.04.1 linux-image-4.10.0-33-generic-lpae 4.10.0-33.37~16.04.1 linux-image-4.10.0-33-lowlatency 4.10.0-33.37~16.04.1 linux-image-generic-hwe-16.04 4.10.0.33.35 linux-image-generic-lpae-hwe-16.04 4.10.0.33.35 linux-image-lowlatency-hwe-16.04 4.10.0.33.35 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-3404-2 https://ubuntu.com/security/notices/USN-3404-1 CVE-2017-7487 Package Information: https://launchpad.net/ubuntu/+source/linux-hwe/4.10.0-33.37~16.04.1 . A resolution for a vulnerability in Ubuntu 16.04 LTS linked to the HWE kernel has been implemented. This update aims to mitigate the risk of potential denial of service incidents.. Linux Kernel,HWE Security Update,Ubuntu 16.04,Denial of Service Fix,System Crash Prevention. . LinuxSecurity.com Team
Aug 28, 2017
Ubuntu
172
security advisorymoderatedenial of serviceUbuntu 14.04 LTS: USN-3386-2 Moderate: Linux Kernel Security Flaw
Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-3385-2 August 11, 2017 linux-lts-xenial vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty Details: USN-3385-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. Andrey Konovalov discovered a race condition in the UDP Fragmentation Offload (UFO) code in the Linux kernel. A local attacker could use this to cause a denial of service or execute arbitrary code. (CVE-2017-1000112) Andrey Konovalov discovered a race condition in AF_PACKET socket option handling code in the Linux kernel. A local unprivileged attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2017-1000111) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-4.4.0-91-generic 4.4.0-91.114~14.04.1 linux-image-4.4.0-91-generic-lpae 4.4.0-91.114~14.04.1 linux-image-4.4.0-91-lowlatency 4.4.0-91.114~14.04.1 linux-image-4.4.0-91-powerpc-e500mc 4.4.0-91.114~14.04.1 linux-image-4.4.0-91-powerpc-smp 4.4.0-91.114~14.04.1 linux-image-4.4.0-91-powerpc64-emb 4.4.0-91.114~14.04.1 linux-image-4.4.0-91-powerpc64-smp 4.4.0-91.114~14.04.1 linux-image-generic-lpae-lts-xenial 4.4.0.91.75 linux-image-generic-lts-xenial 4.4.0.91.75 linux-image-lowlatency-lts-xenial 4.4.0.91.75 linux-image-powerpc-e500mc-lts-xenial 4.4.0.91.75 linux-image-powerpc-smp-lts-xenial 4.4.0.91.75 linux-image-powerpc64-emb-lts-xenial 4.4.0.91.75 linux-image-powerpc64-smp-lts-xenial 4.4.0.91.75 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-3385-1 CVE-2017-1000111, CVE-2017-1000112 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-91.114~14.04.1 . A variety of problems addressed in the Linux kernel for Ubuntu 14.04 LTS; updates crucial for maintaining system integrity and safeguarding security.. Linux Kernel Update, Ubuntu Security Notice, HWE Kernel Issues. . LinuxSecurity.com Team
Aug 11, 2017
Ubuntu
172
security advisorykernelupdate instructionsUbuntu 14.04 LTS USN-3099-2 Moderate Kernel Denial of Service
Several security issues were fixed in the kernel.. =========================================================================Ubuntu Security Notice USN-3099-2 October 11, 2016 linux-lts-xenial vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 LTS Summary: Several security issues were fixed in the kernel. Software Description: - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty Details: USN-3099-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. Vladimír Beneš discovered an unbounded recursion in the VLAN and TEB Generic Receive Offload (GRO) processing implementations in the Linux kernel, A remote attacker could use this to cause a stack corruption, leading to a denial of service (system crash). (CVE-2016-7039) Marco Grassi discovered a use-after-free condition could occur in the TCP retransmit queue handling code in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2016-6828) Pengfei Wang discovered a race condition in the Adaptec AAC RAID controller driver in the Linux kernel when handling ioctl()s. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-6480) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-4.4.0-42-generic 4.4.0-42.62~14.04.1 linux-image-4.4.0-42-generic-lpae 4.4.0-42.62~14.04.1 linux-image-4.4.0-42-lowlatency 4.4.0-42.62~14.04.1 linux-image-4.4.0-42-powerpc-e500mc 4.4.0-42.62~14.04.1 linux-image-4.4.0-42-powerpc-smp 4.4.0-42.62~14.04.1 linux-image-4.4.0-42-powerpc64-emb 4.4.0-42.62~14.04.1 linux-image-4.4.0-42-powerpc64-smp 4.4.0-42.62~14.04.1 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-3099-2 https://ubuntu.com/security/notices/USN-3099-1 CVE-2016-6480, CVE-2016-6828, CVE-2016-7039 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-42.62~14.04.1 . The Ubuntu Security Notice USN-3100-1 deals with severe kernel vulnerabilities impacting LTS versions and provides essential update instructions.. Ubuntu Security Update, HWE Kernel Fix, Kernel Denial Service, Linux Kernel Security. . Severity: Important. LinuxSecurity.com Team
Oct 11, 2016
•Important
Ubuntu
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