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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.1407 Linux kernel vulnerabilities 9 May 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Ubuntu Operating System: Ubuntu Linux variants Impact/Access: Root Compromise -- Existing Account Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-1000199 CVE-2018-8897 CVE-2018-1087 Reference: ESB-2018.1335 Original Bulletin: http://www.ubuntu.com/usn/usn-3641-1 http://www.ubuntu.com/usn/usn-3641-2 Comment: This advisory references vulnerabilities in the Linux kernel that also affect distributions other than Ubuntu. It is recommended that administrators running Linux check for an updated version of the kernel for their system. This bulletin contains two (2) Ubuntu security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3641-1 May 08, 2018 linux, linux-aws, linux-azure, linux-euclid, linux-gcp, linux-hwe, linux-kvm, linux-lts-xenial, linux-oem, linux-raspi2, and linux-snapdragon vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 17.10 - - Ubuntu 16.04 LTS - - Ubuntu 14.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - - linux: Linux kernel - - linux-raspi2: Linux kernel for Raspberry Pi 2 - - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - - linux-azure: Linux kernel for Microsoft Azure Cloud systems - - linux-euclid: Linux kernel for Intel Euclid systems - - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - - linux-hwe: Linux hardware enablement (HWE) kernel - - linux-kvm: Linux kernel for cloud environments - - linux-oem: Linux kernel for OEM processors - - linux-snapdragon: Linux kernel for Snapdragon processors - - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty Details: Nick Peterson discovered that the Linux kernel did not properly handle debug exceptions following a MOV/POP to SS instruction. A local attacker could use this to cause a denial of service (system crash). This issue only affected the amd64 architecture. (CVE-2018-8897) Andy Lutomirski discovered that the KVM subsystem of the Linux kernel did not properly emulate the ICEBP instruction following a MOV/POP to SS instruction. A local attacker in a KVM virtual machine could use this to cause a denial of service (guest VM crash) or possibly escalate privileges inside of the virtual machine. This issue only affected the i386 and amd64 architectures. (CVE-2018-1087) Andy Lutomirski discovered that the Linux kernel did not properly perform error handling on virtualized debug registers. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-1000199) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.10: linux-image-4.13.0-1019-raspi2 4.13.0-1019.20 linux-image-4.13.0-41-generic 4.13.0-41.46 linux-image-4.13.0-41-generic-lpae 4.13.0-41.46 linux-image-4.13.0-41-lowlatency 4.13.0-41.46 linux-image-generic 4.13.0.41.44 linux-image-generic-lpae 4.13.0.41.44 linux-image-lowlatency 4.13.0.41.44 linux-image-raspi2 4.13.0.1019.17 Ubuntu 16.04 LTS: linux-image-4.13.0-1015-gcp 4.13.0-1015.19 linux-image-4.13.0-1016-azure 4.13.0-1016.19 linux-image-4.13.0-1026-oem 4.13.0-1026.29 linux-image-4.13.0-41-generic 4.13.0-41.46~16.04.1 linux-image-4.13.0-41-generic-lpae 4.13.0-41.46~16.04.1 linux-image-4.13.0-41-lowlatency 4.13.0-41.46~16.04.1 linux-image-4.4.0-1023-kvm 4.4.0-1023.28 linux-image-4.4.0-1057-aws 4.4.0-1057.66 linux-image-4.4.0-1089-raspi2 4.4.0-1089.97 linux-image-4.4.0-1092-snapdragon 4.4.0-1092.97 linux-image-4.4.0-124-generic 4.4.0-124.148 linux-image-4.4.0-124-generic-lpae 4.4.0-124.148 linux-image-4.4.0-124-lowlatency 4.4.0-124.148 linux-image-4.4.0-124-powerpc-e500mc 4.4.0-124.148 linux-image-4.4.0-124-powerpc-smp 4.4.0-124.148 linux-image-4.4.0-124-powerpc64-emb 4.4.0-124.148 linux-image-4.4.0-124-powerpc64-smp 4.4.0-124.148 linux-image-4.4.0-9027-euclid 4.4.0-9027.29 linux-image-aws 4.4.0.1057.59 linux-image-azure 4.13.0.1016.17 linux-image-euclid 4.4.0.9027.28 linux-image-gcp 4.13.0.1015.17 linux-image-generic 4.4.0.124.130 linux-image-generic-hwe-16.04 4.13.0.41.60 linux-image-generic-lpae 4.4.0.124.130 linux-image-generic-lpae-hwe-16.04 4.13.0.41.60 linux-image-gke 4.13.0.1015.17 linux-image-kvm 4.4.0.1023.22 linux-image-lowlatency 4.4.0.124.130 linux-image-lowlatency-hwe-16.04 4.13.0.41.60 linux-image-oem 4.13.0.1026.30 linux-image-powerpc-e500mc 4.4.0.124.130 linux-image-powerpc-smp 4.4.0.124.130 linux-image-powerpc64-emb 4.4.0.124.130 linux-image-powerpc64-smp 4.4.0.124.130 linux-image-raspi2 4.4.0.1089.89 linux-image-snapdragon 4.4.0.1092.84 Ubuntu 14.04 LTS: linux-image-3.13.0-147-generic 3.13.0-147.196 linux-image-3.13.0-147-generic-lpae 3.13.0-147.196 linux-image-3.13.0-147-lowlatency 3.13.0-147.196 linux-image-3.13.0-147-powerpc-e500 3.13.0-147.196 linux-image-3.13.0-147-powerpc-e500mc 3.13.0-147.196 linux-image-3.13.0-147-powerpc-smp 3.13.0-147.196 linux-image-3.13.0-147-powerpc64-emb 3.13.0-147.196 linux-image-3.13.0-147-powerpc64-smp 3.13.0-147.196 linux-image-4.4.0-1019-aws 4.4.0-1019.19 linux-image-4.4.0-124-generic 4.4.0-124.148~14.04.1 linux-image-4.4.0-124-generic-lpae 4.4.0-124.148~14.04.1 linux-image-4.4.0-124-lowlatency 4.4.0-124.148~14.04.1 linux-image-4.4.0-124-powerpc-e500mc 4.4.0-124.148~14.04.1 linux-image-4.4.0-124-powerpc-smp 4.4.0-124.148~14.04.1 linux-image-4.4.0-124-powerpc64-emb 4.4.0-124.148~14.04.1 linux-image-4.4.0-124-powerpc64-smp 4.4.0-124.148~14.04.1 linux-image-aws 4.4.0.1019.19 linux-image-generic 3.13.0.147.157 linux-image-generic-lpae 3.13.0.147.157 linux-image-generic-lpae-lts-xenial 4.4.0.124.104 linux-image-generic-lts-xenial 4.4.0.124.104 linux-image-generic-pae 3.13.0.147.157 linux-image-lowlatency 3.13.0.147.157 linux-image-lowlatency-lts-xenial 4.4.0.124.104 linux-image-powerpc-e500 3.13.0.147.157 linux-image-powerpc-e500mc 3.13.0.147.157 linux-image-powerpc-e500mc-lts-xenial 4.4.0.124.104 linux-image-powerpc-smp 3.13.0.147.157 linux-image-powerpc-smp-lts-xenial 4.4.0.124.104 linux-image-powerpc64-emb 3.13.0.147.157 linux-image-powerpc64-emb-lts-xenial 4.4.0.124.104 linux-image-powerpc64-smp 3.13.0.147.157 linux-image-powerpc64-smp-lts-xenial 4.4.0.124.104 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://usn.ubuntu.com/usn/usn-3641-1 CVE-2018-1000199, CVE-2018-1087, CVE-2018-8897 Package Information: https://launchpad.net/ubuntu/+source/linux/4.13.0-41.46 https://launchpad.net/ubuntu/+source/linux-raspi2/4.13.0-1019.20 https://launchpad.net/ubuntu/+source/linux/4.4.0-124.148 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1057.66 https://launchpad.net/ubuntu/+source/linux-azure/4.13.0-1016.19 https://launchpad.net/ubuntu/+source/linux-euclid/4.4.0-9027.29 https://launchpad.net/ubuntu/+source/linux-gcp/4.13.0-1015.19 https://launchpad.net/ubuntu/+source/linux-hwe/4.13.0-41.46~16.04.1 https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1023.28 https://launchpad.net/ubuntu/+source/linux-oem/4.13.0-1026.29 https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1089.97 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1092.97 https://launchpad.net/ubuntu/+source/linux/3.13.0-147.196 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1019.19 https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-124.148~14.04.1 - -------- ========================================================================== Ubuntu Security Notice USN-3641-2 May 08, 2018 linux, linux-lts-trusty vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 12.04 ESM Summary: Several security issues were fixed in the Linux kernel. Software Description: - - linux: Linux kernel - - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM Details: USN-3641-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 17.10. This update provides the corresponding updates for Ubuntu 12.04 ESM. Nick Peterson discovered that the Linux kernel did not properly handle debug exceptions following a MOV/POP to SS instruction. A local attacker could use this to cause a denial of service (system crash). This issue only affected the amd64 architecture. (CVE-2018-8897) Andy Lutomirski discovered that the KVM subsystem of the Linux kernel did not properly emulate the ICEBP instruction following a MOV/POP to SS instruction. A local attacker in a KVM virtual machine could use this to cause a denial of service (guest VM crash) or possibly escalate privileges inside of the virtual machine. This issue only affected the i386 and amd64 architectures. (CVE-2018-1087) Andy Lutomirski discovered that the Linux kernel did not properly perform error handling on virtualized debug registers. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-1000199) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM: linux-image-3.13.0-147-generic 3.13.0-147.196~precise1 linux-image-3.13.0-147-generic-lpae 3.13.0-147.196~precise1 linux-image-3.2.0-134-generic 3.2.0-134.180 linux-image-3.2.0-134-generic-pae 3.2.0-134.180 linux-image-3.2.0-134-highbank 3.2.0-134.180 linux-image-3.2.0-134-omap 3.2.0-134.180 linux-image-3.2.0-134-powerpc-smp 3.2.0-134.180 linux-image-3.2.0-134-powerpc64-smp 3.2.0-134.180 linux-image-3.2.0-134-virtual 3.2.0-134.180 linux-image-generic 3.2.0.134.149 linux-image-generic-lpae-lts-trusty 3.13.0.147.138 linux-image-generic-lts-trusty 3.13.0.147.138 linux-image-generic-pae 3.2.0.134.149 linux-image-highbank 3.2.0.134.149 linux-image-omap 3.2.0.134.149 linux-image-powerpc 3.2.0.134.149 linux-image-powerpc-smp 3.2.0.134.149 linux-image-powerpc64-smp 3.2.0.134.149 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://usn.ubuntu.com/usn/usn-3641-2 https://usn.ubuntu.com/usn/usn-3641-1 CVE-2018-1000199, CVE-2018-1087, CVE-2018-8897 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWvJkIYx+lLeg9Ub1AQhZrhAAlU6cJ6666rxfEpcTu7xTqlW3N4oh+rkB VznIgqiEzbhm4Dl/H5tWODvSPDCjSs3k/tDJY/NMN8NhBUBO9D8rvcs0/rUKWvoS SM2bUU4NX/HxR0CkFyHSfrw7N1qTzmM9LAaGSc2nHetwtn1xaaFclpFaQrjH9j2J vefHlKZGMuHUWi4wvWQeTo6fcIkA+Ic0LnhKU8ogu+za+Ra8mmC/HBxhyDWM8eNo PXbWMSWzLTJVgL2pTpqsrexZu/+xbxH6rPmU1voQj4VVh5EVugQpEo2H/jNPQpuh 9aHao4twqlfgGZC5x54EKjyK7vbbCgIHbuaIlC8LdFtMK7+4Inr+qruS+xDgueB/ Mk1f/q6hN9M9gfrlHYAVPhQrb30KxEHOzf/usqaoVymmKhEcGoZssQ6aRFG314PL Kf7nKpmm0nNt0puY0QcUuJ/25muZ2z0CbPuul9vhqPHLVbRf8nzHQUxV/bSeRMY3 RFPYWplaaHNDYILaP1zNxMyYayI15mUzfrwiDPHlURUOxlW9EJ9TsDyvoNgSZqFi iSkUTRLcxmHq0kBBhEXBdc1FUQ3BBv0rC9XW4TViRUlxKkPTh+WKb+H7VBVn5HUd ff9z+++xhOk3mgcedgM/018DvRCqXK9OKASo4IgswKAmIwW6D9QuEJB1sp98Aqwq LuYTwsEi7CM= =Qv4Z -----END PGP SIGNATURE-----