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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.4272 USN-4185: Linux kernel vulnerabilities 14 November 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Root Compromise -- Existing Account Access Privileged Data -- Existing Account Denial of Service -- Existing Account Unauthorised Access -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-17666 CVE-2019-17056 CVE-2019-17055 CVE-2019-17054 CVE-2019-17053 CVE-2019-17052 CVE-2019-15098 CVE-2019-11135 CVE-2019-0155 CVE-2019-0154 CVE-2018-12207 Reference: ASB-2019.0330 ASB-2019.0321 ESB-2019.4254 ESB-2019.4246 ESB-2019.3835.3 ESB-2019.3817 Original Bulletin: https://usn.ubuntu.com/4185-1/ https://usn.ubuntu.com/4185-2/ https://usn.ubuntu.com/4185-3/ Comment: This bulletin contains three (3) Ubuntu security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4185-1: Linux kernel vulnerabilities 13 November 2019 linux, linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS Summary Several security issues were fixed in the Linux kernel. Software Description o linux - Linux kernel o linux-aws - Linux kernel for Amazon Web Services (AWS) systems o linux-gke-4.15 - Linux kernel for Google Container Engine (GKE) systems o linux-kvm - Linux kernel for cloud environments o linux-oem - Linux kernel for OEM processors o linux-oracle - Linux kernel for Oracle Cloud systems o linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems o linux-azure - Linux kernel for Microsoft Azure Cloud systems o linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems o linux-hwe - Linux hardware enablement (HWE) kernel Details Stephan van Schaik, Alyssa Milburn, Sebastian A sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel processors using Transactional Synchronization Extensions (TSX) could expose memory contents previously stored in microarchitectural buffers to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2019-11135) It was discovered that the Intel i915 graphics chipsets allowed userspace to modify page table entries via writes to MMIO from the Blitter Command Streamer and expose kernel memory information. A local attacker could use this to expose sensitive information or possibly elevate privileges. (CVE-2019-0155) Deepak Gupta discovered that on certain Intel processors, the Linux kernel did not properly perform invalidation on page table updates by virtual guest operating systems. A local attacker in a guest VM could use this to cause a denial of service (host system crash). (CVE-2018-12207) It was discovered that the Intel i915 graphics chipsets could cause a system hang when userspace performed a read from GT memory mapped input output (MMIO) when the product is in certain low power states. A local attacker could use this to cause a denial of service. (CVE-2019-0154) Hui Peng discovered that the Atheros AR6004 USB Wi-Fi device driver for the Linux kernel did not properly validate endpoint descriptors returned by the device. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15098) Ori Nimron discovered that the AX25 network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17052) Ori Nimron discovered that the IEEE 802.15.4 Low-Rate Wireless network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17053) Ori Nimron discovered that the Appletalk network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17054) Ori Nimron discovered that the modular ISDN network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17055) Ori Nimron discovered that the Near field Communication (NFC) network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17056) Nico Waisman discovered that a buffer overflow existed in the Realtek Wi-Fi driver for the Linux kernel when handling Notice of Absence frames. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-17666) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS linux-image-4.15.0-1029-oracle - 4.15.0-1029.32 linux-image-4.15.0-1048-gke - 4.15.0-1048.51 linux-image-4.15.0-1050-kvm - 4.15.0-1050.50 linux-image-4.15.0-1054-aws - 4.15.0-1054.56 linux-image-4.15.0-1063-oem - 4.15.0-1063.72 linux-image-4.15.0-69-generic - 4.15.0-69.78 linux-image-4.15.0-69-generic-lpae - 4.15.0-69.78 linux-image-4.15.0-69-lowlatency - 4.15.0-69.78 linux-image-aws - 4.15.0.1054.55 linux-image-aws-lts-18.04 - 4.15.0.1054.55 linux-image-generic - 4.15.0.69.71 linux-image-generic-lpae - 4.15.0.69.71 linux-image-gke - 4.15.0.1048.51 linux-image-gke-4.15 - 4.15.0.1048.51 linux-image-kvm - 4.15.0.1050.50 linux-image-lowlatency - 4.15.0.69.71 linux-image-oem - 4.15.0.1063.67 linux-image-oracle - 4.15.0.1029.34 linux-image-oracle-lts-18.04 - 4.15.0.1029.34 linux-image-powerpc-e500mc - 4.15.0.69.71 linux-image-powerpc-smp - 4.15.0.69.71 linux-image-powerpc64-emb - 4.15.0.69.71 linux-image-powerpc64-smp - 4.15.0.69.71 linux-image-virtual - 4.15.0.69.71 Ubuntu 16.04 LTS linux-image-4.15.0-1029-oracle - 4.15.0-1029.32~16.04.1 linux-image-4.15.0-1049-gcp - 4.15.0-1049.52 linux-image-4.15.0-1054-aws - 4.15.0-1054.56~16.04.1 linux-image-4.15.0-1063-azure - 4.15.0-1063.68 linux-image-4.15.0-69-generic - 4.15.0-69.78~16.04.1 linux-image-4.15.0-69-generic-lpae - 4.15.0-69.78~16.04.1 linux-image-4.15.0-69-lowlatency - 4.15.0-69.78~16.04.1 linux-image-aws-hwe - 4.15.0.1054.54 linux-image-azure - 4.15.0.1063.66 linux-image-gcp - 4.15.0.1049.63 linux-image-generic-hwe-16.04 - 4.15.0.69.89 linux-image-generic-lpae-hwe-16.04 - 4.15.0.69.89 linux-image-gke - 4.15.0.1049.63 linux-image-lowlatency-hwe-16.04 - 4.15.0.69.89 linux-image-oem - 4.15.0.69.89 linux-image-oracle - 4.15.0.1029.22 linux-image-virtual-hwe-16.04 - 4.15.0.69.89 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . Please note that mitigating the TSX (CVE-2019-11135) and i915 (CVE-2019-0154) issues requires corresponding microcode and graphics firmware updates respectively. 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 o CVE-2018-12207 o CVE-2019-0154 o CVE-2019-0155 o CVE-2019-11135 o CVE-2019-15098 o CVE-2019-17052 o CVE-2019-17053 o CVE-2019-17054 o CVE-2019-17055 o CVE-2019-17056 o CVE-2019-17666 o https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/TAA_MCEPSC_i915 ============================================================================== USN-4185-2: Linux kernel (Azure) vulnerabilities 13 November 2019 linux-azure vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 14.04 ESM Summary Several security issues were fixed in the Linux kernel. Software Description o linux-azure - Linux kernel for Microsoft Azure Cloud systems Details Stephan van Schaik, Alyssa Milburn, Sebastian A sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel processors using Transactional Synchronization Extensions (TSX) could expose memory contents previously stored in microarchitectural buffers to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2019-11135) Deepak Gupta discovered that on certain Intel processors, the Linux kernel did not properly perform invalidation on page table updates by virtual guest operating systems. A local attacker in a guest VM could use this to cause a denial of service (host system crash). (CVE-2018-12207) Ori Nimron discovered that the AX25 network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17052) Ori Nimron discovered that the IEEE 802.15.4 Low-Rate Wireless network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17053) Ori Nimron discovered that the Appletalk network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17054) Ori Nimron discovered that the modular ISDN network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17055) Ori Nimron discovered that the Near field Communication (NFC) network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17056) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM linux-image-4.15.0-1063-azure - 4.15.0-1063.68~14.04.1 linux-image-azure - 4.15.0.1063.49 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . Please note that mitigating the TSX (CVE-2019-11135) issue requires a corresponding Intel processor microcode update. 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 o USN-4185-1 o CVE-2018-12207 o CVE-2019-11135 o CVE-2019-17052 o CVE-2019-17053 o CVE-2019-17054 o CVE-2019-17055 o CVE-2019-17056 o https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/TAA_MCEPSC_i915 ============================================================================== USN-4185-3: Linux kernel vulnerability and regression 13 November 2019 linux, linux-hwe, linux-oem vulnerability and regression A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS Summary Several issues were fixed in the Linux kernel. Software Description o linux - Linux kernel o linux-oem - Linux kernel for OEM processors o linux-hwe - Linux hardware enablement (HWE) kernel Details USN-4185-1 fixed vulnerabilities in the Linux kernel. It was discovered that the kernel fix for CVE-2019-0155 (i915 missing Blitter Command Streamer check) was incomplete on 64-bit Intel x86 systems. Also, the update introduced a regression that broke KVM guests where extended page tables (EPT) are disabled or not supported. This update addresses both issues. We apologize for the inconvenience. Original advisory details: Stephan van Schaik, Alyssa Milburn, Sebastian A sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel processors using Transactional Synchronization Extensions (TSX) could expose memory contents previously stored in microarchitectural buffers to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2019-11135) It was discovered that the Intel i915 graphics chipsets allowed userspace to modify page table entries via writes to MMIO from the Blitter Command Streamer and expose kernel memory information. A local attacker could use this to expose sensitive information or possibly elevate privileges. (CVE-2019-0155) Deepak Gupta discovered that on certain Intel processors, the Linux kernel did not properly perform invalidation on page table updates by virtual guest operating systems. A local attacker in a guest VM could use this to cause a denial of service (host system crash). (CVE-2018-12207) It was discovered that the Intel i915 graphics chipsets could cause a system hang when userspace performed a read from GT memory mapped input output (MMIO) when the product is in certain low power states. A local attacker could use this to cause a denial of service. (CVE-2019-0154) Hui Peng discovered that the Atheros AR6004 USB Wi-Fi device driver for the Linux kernel did not properly validate endpoint descriptors returned by the device. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15098) Ori Nimron discovered that the AX25 network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17052) Ori Nimron discovered that the IEEE 802.15.4 Low-Rate Wireless network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17053) Ori Nimron discovered that the Appletalk network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17054) Ori Nimron discovered that the modular ISDN network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17055) Ori Nimron discovered that the Near field Communication (NFC) network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17056) Nico Waisman discovered that a buffer overflow existed in the Realtek Wi-Fi driver for the Linux kernel when handling Notice of Absence frames. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-17666) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS linux-image-4.15.0-1064-oem - 4.15.0-1064.73 linux-image-4.15.0-70-generic - 4.15.0-70.79 linux-image-4.15.0-70-generic-lpae - 4.15.0-70.79 linux-image-4.15.0-70-lowlatency - 4.15.0-70.79 linux-image-generic - 4.15.0.70.72 linux-image-generic-lpae - 4.15.0.70.72 linux-image-lowlatency - 4.15.0.70.72 linux-image-oem - 4.15.0.1064.68 linux-image-virtual - 4.15.0.70.72 Ubuntu 16.04 LTS linux-image-4.15.0-70-generic - 4.15.0-70.79~16.04.1 linux-image-4.15.0-70-generic-lpae - 4.15.0-70.79~16.04.1 linux-image-4.15.0-70-lowlatency - 4.15.0-70.79~16.04.1 linux-image-generic-hwe-16.04 - 4.15.0.70.90 linux-image-generic-lpae-hwe-16.04 - 4.15.0.70.90 linux-image-lowlatency-hwe-16.04 - 4.15.0.70.90 linux-image-oem - 4.15.0.70.90 linux-image-virtual-hwe-16.04 - 4.15.0.70.90 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . Please note that mitigating the TSX (CVE-2019-11135) and i915 (CVE-2019-0154) issues requires corresponding microcode and graphics firmware updates respectively. 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 o USN-4185-1 o CVE-2019-0155 o LP: 1851709 o LP: 1852141 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXczHtmaOgq3Tt24GAQiX5RAAlcExZAQVG5PgCG7PBMN2+X+3rPv4rmqA FcmzI8UaXYoEWFJ+r0OXtEtpwFd1UDuS0bkddq5c59A5P/tkZVokhQ/iWMztmukF NmLLedQ+o+Y7WOtnUyyl2YX74N8w8w88PcWGQ9PmMLgydMT/m8q0yIDE7QU3yXFa /BXkc4raqReCgOBWNATM/Ch6XYVU3roOgql4Z3Pm7QfQopNbBrv631aJHcrtsVur 4VloLto3w5rzx39TJHW95wKg1z4uFKaqhpPHfhqhA4rmnYKlsucp8y2PaBaYcrGn fdjev6x2tHOiQB6IaSp9RWbPyhr6ByeauSd4WywWjfnCslqllASK75ySOYgY21cD TsFwTm5/ZO6kFOWSuk/VhkXWoN9Tnl/7+I1/zsqkir4qOROOOym51JgDGq/YKzfU cCaCEnuk24OUoOV4i+p1JxKFKyRSbaFIDYai7Ug4Q6Ccdr9y0x8YpGm48yqDSdyl ZrSncQVKPu3HgejKBUagbuv0kghovzbGcZXG3rgADgz/RNIqxG/oCkWFibP986sc +I7CY3RZSCEZ092ApTb29gB82aTFXrqLQWv0h8SjQQkpQMq4qtHSv9+ErclKSnLY uQm1Ndf3nA3T4FPtnC808lUaZrZqay2ynaSM9SD3S7RQHBcl+QaPobeyJ7ItTmTL wyFlCeYim5o= =WYAL -----END PGP SIGNATURE-----