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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.1549 Linux kernel vulnerability 22 May 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Increased Privileges -- Existing Account Access Privileged Data -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-8822 CVE-2018-3639 CVE-2017-18221 CVE-2017-18208 CVE-2017-18204 CVE-2017-18203 CVE-2017-18079 CVE-2017-17975 CVE-2017-17449 CVE-2017-13305 CVE-2017-13220 CVE-2017-12134 Reference: ASB-2018.0121 ESB-2018.1545 ESB-2018.1459 ESB-2018.1359 Original Bulletin: http://www.ubuntu.com/usn/usn-3652-1 http://www.ubuntu.com/usn/usn-3653-1 http://www.ubuntu.com/usn/usn-3654-2 http://www.ubuntu.com/usn/usn-3655-2 Comment: This bulletin contains four (4) Ubuntu security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3652-1 May 22, 2018 linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oem vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 18.04 LTS Summary: The system could be made to expose sensitive information. Software Description: - - linux: Linux kernel - - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - - linux-azure: Linux kernel for Microsoft Azure Cloud systems - - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - - linux-kvm: Linux kernel for cloud environments - - linux-oem: Linux kernel for OEM processors Details: Jann Horn and Ken Johnson discovered that microprocessors utilizing speculative execution of a memory read may allow unauthorized memory reads via a sidechannel attack. This flaw is known as Spectre Variant 4. A local attacker could use this to expose sensitive information, including kernel memory. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-4.15.0-1008-gcp 4.15.0-1008.8 linux-image-4.15.0-1009-aws 4.15.0-1009.9 linux-image-4.15.0-1010-kvm 4.15.0-1010.10 linux-image-4.15.0-22-generic 4.15.0-22.24 linux-image-4.15.0-22-generic-lpae 4.15.0-22.24 linux-image-4.15.0-22-lowlatency 4.15.0-22.24 linux-image-aws 4.15.0.1009.9 linux-image-azure 4.15.0.1012.12 linux-image-azure-edge 4.15.0.1012.12 linux-image-gcp 4.15.0.1008.10 linux-image-generic 4.15.0.22.23 linux-image-generic-lpae 4.15.0.22.23 linux-image-gke 4.15.0.1008.10 linux-image-kvm 4.15.0.1010.10 linux-image-lowlatency 4.15.0.22.23 linux-image-oem 4.15.0.1006.8 Please note that fully mitigating CVE-2018-3639 (Spectre Variant 4) may require corresponding processor microcode/firmware updates or, in virtual environments, hypervisor updates. On i386 and amd64 architectures, the SSBD feature is required to enable the kernel mitigations. BIOS vendors will be making updates available for Intel processors that implement SSBD and Ubuntu is working with Intel to provide future microcode updates. Ubuntu users with a processor from a different vendor should contact the vendor to identify necessary firmware updates. Ubuntu provided corresponding QEMU updates for users of self-hosted virtual environments in USN 3651-1. Ubuntu users in cloud environments should contact the cloud provider to confirm that the hypervisor has been updated to expose the new CPU features to virtual machines. References: https://usn.ubuntu.com/usn/usn-3652-1 CVE-2018-3639, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/Variant4 Package Information: https://launchpad.net/ubuntu/+source/linux/4.15.0-22.24 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1009.9 https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1012.12 https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1008.8 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1010.10 https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1006.9 - ----------------------------------------------------------------------------- ========================================================================== Ubuntu Security Notice USN-3653-1 May 22, 2018 linux vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 17.10 Summary: Several security issues were addressed in the Linux kernel. Software Description: - - linux: Linux kernel Details: Jann Horn and Ken Johnson discovered that microprocessors utilizing speculative execution of a memory read may allow unauthorized memory reads via a sidechannel attack. This flaw is known as Spectre Variant 4. A local attacker could use this to expose sensitive information, including kernel memory. (CVE-2018-3639) It was discovered that the netlink subsystem in the Linux kernel did not properly restrict observations of netlink messages to the appropriate net namespace. A local attacker could use this to expose sensitive information (kernel netlink traffic). (CVE-2017-17449) Tuba Yavuz discovered that a double-free error existed in the USBTV007 driver of the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-17975) It was discovered that a race condition existed in the Device Mapper component of the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-18203) It was discovered that an infinite loop could occur in the madvise(2) implementation in the Linux kernel in certain circumstances. A local attacker could use this to cause a denial of service (system hang). (CVE-2017-18208) Silvio Cesare discovered a buffer overwrite existed in the NCPFS implementation in the Linux kernel. A remote attacker controlling a malicious NCPFS server could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-8822) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.10: linux-image-4.13.0-43-generic 4.13.0-43.48 linux-image-4.13.0-43-generic-lpae 4.13.0-43.48 linux-image-4.13.0-43-lowlatency 4.13.0-43.48 linux-image-generic 4.13.0.43.46 linux-image-generic-lpae 4.13.0.43.46 linux-image-lowlatency 4.13.0.43.46 Please note that fully mitigating CVE-2018-3639 (Spectre Variant 4) may require corresponding processor microcode/firmware updates or, in virtual environments, hypervisor updates. On i386 and amd64 architectures, the SSBD feature is required to enable the kernel mitigations. BIOS vendors will be making updates available for Intel processors that implement SSBD and Ubuntu is working with Intel to provide future microcode updates. Ubuntu users with a processor from a different vendor should contact the vendor to identify necessary firmware updates. Ubuntu provided corresponding QEMU updates for users of self-hosted virtual environments in USN 3651-1. Ubuntu users in cloud environments should contact the cloud provider to confirm that the hypervisor has been updated to expose the new CPU features to virtual machines. References: https://usn.ubuntu.com/usn/usn-3653-1 CVE-2017-17449, CVE-2017-17975, CVE-2017-18203, CVE-2017-18208, CVE-2018-3639, CVE-2018-8822, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/Variant4 Package Information: https://launchpad.net/ubuntu/+source/linux/4.13.0-43.48 - ----------------------------------------------------------------------------- ========================================================================== Ubuntu Security Notice USN-3654-2 May 22, 2018 linux-lts-xenial, linux-aws vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 14.04 LTS Summary: Several security issues were addressed in the Linux kernel. Software Description: - - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty Details: USN-3654-1 fixed vulnerabilities and added mitigations 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. Jann Horn and Ken Johnson discovered that microprocessors utilizing speculative execution of a memory read may allow unauthorized memory reads via a sidechannel attack. This flaw is known as Spectre Variant 4. A local attacker could use this to expose sensitive information, including kernel memory. (CVE-2018-3639) Tuba Yavuz discovered that a double-free error existed in the USBTV007 driver of the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-17975) It was discovered that a race condition existed in the F2FS implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-18193) It was discovered that a buffer overflow existed in the Hisilicon HNS Ethernet Device driver in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-18222) It was discovered that the netfilter subsystem in the Linux kernel did not validate that rules containing jumps contained user-defined chains. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-1065) It was discovered that the netfilter subsystem of the Linux kernel did not properly validate ebtables offsets. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-1068) It was discovered that a null pointer dereference vulnerability existed in the DCCP protocol implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-1130) It was discovered that the SCTP Protocol implementation in the Linux kernel did not properly validate userspace provided payload lengths in some situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-5803) It was discovered that a double free error existed in the block layer subsystem of the Linux kernel when setting up a request queue. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-7480) It was discovered that a memory leak existed in the SAS driver subsystem of the Linux kernel. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2018-7757) It was discovered that a race condition existed in the x86 machine check handler in the Linux kernel. A local privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-7995) Eyal Itkin discovered that the USB displaylink video adapter driver in the Linux kernel did not properly validate mmap offsets sent from userspace. A local attacker could use this to expose sensitive information (kernel memory) or possibly execute arbitrary code. (CVE-2018-8781) Silvio Cesare discovered a buffer overwrite existed in the NCPFS implementation in the Linux kernel. A remote attacker controlling a malicious NCPFS server could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-8822) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-4.4.0-1022-aws 4.4.0-1022.22 linux-image-4.4.0-127-generic 4.4.0-127.153~14.04.1 linux-image-4.4.0-127-generic-lpae 4.4.0-127.153~14.04.1 linux-image-4.4.0-127-lowlatency 4.4.0-127.153~14.04.1 linux-image-4.4.0-127-powerpc-e500mc 4.4.0-127.153~14.04.1 linux-image-4.4.0-127-powerpc-smp 4.4.0-127.153~14.04.1 linux-image-4.4.0-127-powerpc64-emb 4.4.0-127.153~14.04.1 linux-image-4.4.0-127-powerpc64-smp 4.4.0-127.153~14.04.1 linux-image-aws 4.4.0.1022.22 linux-image-generic-lpae-lts-xenial 4.4.0.127.107 linux-image-generic-lts-xenial 4.4.0.127.107 linux-image-lowlatency-lts-xenial 4.4.0.127.107 linux-image-powerpc-e500mc-lts-xenial 4.4.0.127.107 linux-image-powerpc-smp-lts-xenial 4.4.0.127.107 linux-image-powerpc64-emb-lts-xenial 4.4.0.127.107 linux-image-powerpc64-smp-lts-xenial 4.4.0.127.107 Please note that fully mitigating CVE-2018-3639 (Spectre Variant 4) may require corresponding processor microcode/firmware updates or, in virtual environments, hypervisor updates. On i386 and amd64 architectures, the SSBD feature is required to enable the kernel mitigations. BIOS vendors will be making updates available for Intel processors that implement SSBD and Ubuntu is working with Intel to provide future microcode updates. Ubuntu users with a processor from a different vendor should contact the vendor to identify necessary firmware updates. Ubuntu provided corresponding QEMU updates for users of self-hosted virtual environments in USN 3651-1. Ubuntu users in cloud environments should contact the cloud provider to confirm that the hypervisor has been updated to expose the new CPU features to virtual machines. References: https://usn.ubuntu.com/usn/usn-3654-2 https://usn.ubuntu.com/usn/usn-3654-1 CVE-2017-17975, CVE-2017-18193, CVE-2017-18222, CVE-2018-1065, CVE-2018-1068, CVE-2018-1130, CVE-2018-3639, CVE-2018-5803, CVE-2018-7480, CVE-2018-7757, CVE-2018-7995, CVE-2018-8781, CVE-2018-8822, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/Variant4 Package Information: https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1022.22 https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-127.153~14.04.1 - ----------------------------------------------------------------------------- ========================================================================== Ubuntu Security Notice USN-3655-2 May 22, 2018 linux-lts-trusty vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 12.04 ESM Summary: Several security issues were addressed in the Linux kernel. Software Description: - - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM Details: USN-3655-1 fixed vulnerabilities and added mitigations in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 ESM. Jann Horn and Ken Johnson discovered that microprocessors utilizing speculative execution of a memory read may allow unauthorized memory reads via a sidechannel attack. This flaw is known as Spectre Variant 4. A local attacker could use this to expose sensitive information, including kernel memory. (CVE-2018-3639) Jan H. Schonherr discovered that the Xen subsystem did not properly handle block IO merges correctly in some situations. An attacker in a guest vm could use this to cause a denial of service (host crash) or possibly gain administrative privileges in the host. (CVE-2017-12134) It was discovered that the Bluetooth HIP Protocol implementation in the Linux kernel did not properly validate HID connection setup information. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-13220) It was discovered that a buffer overread vulnerability existed in the keyring subsystem of the Linux kernel. A local attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2017-13305) It was discovered that the netlink subsystem in the Linux kernel did not properly restrict observations of netlink messages to the appropriate net namespace. A local attacker could use this to expose sensitive information (kernel netlink traffic). (CVE-2017-17449) It was discovered that a race condition existed in the i8042 serial device driver implementation in the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-18079) It was discovered that a race condition existed in the Device Mapper component of the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-18203) It was discovered that a race condition existed in the OCFS2 file system implementation in the Linux kernel. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2017-18204) It was discovered that an infinite loop could occur in the madvise(2) implementation in the Linux kernel in certain circumstances. A local attacker could use this to cause a denial of service (system hang). (CVE-2017-18208) Kefeng Wang discovered that a race condition existed in the memory locking implementation in the Linux kernel. A local attacker could use this to cause a denial of service. (CVE-2017-18221) Silvio Cesare discovered a buffer overwrite existed in the NCPFS implementation in the Linux kernel. A remote attacker controlling a malicious NCPFS server could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-8822) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM: linux-image-3.13.0-149-generic 3.13.0-149.199~precise1 linux-image-3.13.0-149-generic-lpae 3.13.0-149.199~precise1 linux-image-generic-lpae-lts-trusty 3.13.0.149.140 linux-image-generic-lts-trusty 3.13.0.149.140 Please note that fully mitigating CVE-2018-3639 (Spectre Variant 4) may require corresponding processor microcode/firmware updates or, in virtual environments, hypervisor updates. On i386 and amd64 architectures, the SSBD feature is required to enable the kernel mitigations. BIOS vendors will be making updates available for Intel processors that implement SSBD. Ubuntu users with a processor from a different vendor should contact the vendor to identify necessary firmware updates. Ubuntu users in cloud environments should contact the cloud provider to confirm that the hypervisor has been updated to expose the new CPU features to virtual machines. References: https://usn.ubuntu.com/usn/usn-3655-2 https://usn.ubuntu.com/usn/usn-3655-1 CVE-2017-12134, CVE-2017-13220, CVE-2017-13305, CVE-2017-17449, CVE-2017-18079, CVE-2017-18203, CVE-2017-18204, CVE-2017-18208, CVE-2017-18221, CVE-2018-3639, CVE-2018-8822, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/Variant4 - --------------------------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 iQIVAwUBWwSgdIx+lLeg9Ub1AQiGFg//ciDrXWuAWFJ7WU5tKFwPcSogkeRWsK3q Vz6fwCI6hvDDde2vLVxQkDS8VPV6LuXuLxeYLT6joV6V66lK5RlC7e1OX/VkJ83K Ckld5tJpEogBuP7afIEnY86Z7lO96jkxmbTs0ZcnPHh4B8p8sun/ZiJ/PlIsbLSc c3AZdL/qECUtqLdjKZWGePseKnvjCYaGbHrczZlXxOiCLa1uAteta3QWFLCUg9OY RY7xOuIS5c28w1o2GKRzf2F9gc1L5zoBU6wpD5Jv+fSLeheKLDnEvCNeOYMKFRa3 WVT1/anZ/EmtcEm/8ZiGrNas/HwMaD01i8ErebwgMzEH6nFAwNv0D0miDRyk/Ra+ IpLUErfaIvNHU1+KB7+wsOblbgkQm+S4IwWfwL/KP4hU5zn6NtbRPPisuuIp2tbN A8sa1llsNOnZHilfeFdbgw7IUCxr8dDwoA4VfTAfQhFiklZSKHHgdDHLv+ZwTT9m J8UZIMrCPOcoWcONtbc5DITlGMUlgjg9ABp9aOU1oG80VONc5MbKwbZZVTaayhGk 2qStGSPFqBDLn8BYEnpfT0DKdRVDFlZidhk6yS8Qp/ocWNCjLYhmnM22dAUXrMA5 n+OmlPNSeiHqprxbdR4gDNgmNKmXxpIwz804vlXk9ZpBcWJzST0Gsyqh8Qu1Ujdg p0FW/M1kwnE= =2TSe -----END PGP SIGNATURE-----