ID

VAR-201905-1248

CVE

CVE-2019-11091

TITLE

Multiple Intel Product Information Disclosure Vulnerabilities (CNVD-2019-22234)

DESCRIPTION

Microarchitectural Data Sampling Uncacheable Memory (MDSUM): Uncacheable memory on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. A list of impacted products can be found here: https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-update-guidance_05132019.pdf. Intel Xeon Scalable Processors and so on are products of Intel Corporation of the United States. Intel XeonScalable Processors is a scalable server central processing unit (CPU). IntelXeonProcessorE7v4Family is a XeonE7 series server central processing unit (CPU). IntelXeonProcessorE5v4Family is a XeonE5 series server central processing unit (CPU). An information disclosure vulnerability exists in several Intel products. The vulnerability stems from errors in the configuration of the network system or product during operation. An unauthorized attacker can exploit the vulnerability to obtain sensitive information about the affected component. The following products and versions are affected: Intel Xeon Scalable Processors; Xeon Processor E7 v4 Family; Xeon Processor E5 v4 Family; Xeon Processor E3 v6 Family; Xeon Processor E3 v4 Family; Xeon Processor E; Xeon E Processor; Xeon D Processor; Puma; Pentium Processor Silver Series; Pentium Processor N Series; Pentium Processor J Series; Pentium Gold Processor Series; Mobile Communications Platforms; Microcode; Core X series Processors; Celeron Processor N Series; Celeron Processor J Series; Celeron Processor G Series; Atom Processor X Series ;Atom Processor E3900 Series;Atom Processor E3800 Series;Atom Processor. The vulnerability is due to improper memory operations that could expose a side channel on the affected system. A successful exploit could be used to conduct further attacks. Proof-of-concept (PoC) code that demonstrates an exploit of this vulnerability is publicly available. A third-party patch is also available. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm security update Advisory ID: RHSA-2019:1185-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2019:1185 Issue date: 2019-05-14 CVE Names: CVE-2018-12126 CVE-2018-12127 CVE-2018-12130 CVE-2019-11091 ===================================================================== 1. Summary: An update for qemu-kvm is now available for Red Hat Enterprise Linux 7.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) - x86_64 Red Hat Enterprise Linux Server EUS (v. 7.4) - ppc64, ppc64le, x86_64 3. Description: Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM. Security Fix(es): * A flaw was found in the implementation of the "fill buffer", a mechanism used by modern CPUs when a cache-miss is made on L1 CPU cache. If an attacker can generate a load operation that would create a page fault, the execution will continue speculatively with incorrect data from the fill buffer while the data is fetched from higher level caches. This response time can be measured to infer data in the fill buffer. (CVE-2018-12130) * Modern Intel microprocessors implement hardware-level micro-optimizations to improve the performance of writing data back to CPU caches. The write operation is split into STA (STore Address) and STD (STore Data) sub-operations. These sub-operations allow the processor to hand-off address generation logic into these sub-operations for optimized writes. Both of these sub-operations write to a shared distributed processor structure called the 'processor store buffer'. As a result, an unprivileged attacker could use this flaw to read private data resident within the CPU's processor store buffer. (CVE-2018-12126) * Microprocessors use a ‘load port’ subcomponent to perform load operations from memory or IO. During a load operation, the load port receives data from the memory or IO subsystem and then provides the data to the CPU registers and operations in the CPU’s pipelines. Stale load operations results are stored in the 'load port' table until overwritten by newer operations. Certain load-port operations triggered by an attacker can be used to reveal data about previous stale requests leaking data back to the attacker via a timing side-channel. (CVE-2019-11091) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1646781 - CVE-2018-12126 hardware: Microarchitectural Store Buffer Data Sampling (MSBDS) 1646784 - CVE-2018-12130 hardware: Microarchitectural Fill Buffer Data Sampling (MFBDS) 1667782 - CVE-2018-12127 hardware: Micro-architectural Load Port Data Sampling - Information Leak (MLPDS) 1705312 - CVE-2019-11091 hardware: Microarchitectural Data Sampling Uncacheable Memory (MDSUM) 6. Package List: Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4): Source: qemu-kvm-1.5.3-141.el7_4.10.src.rpm x86_64: qemu-img-1.5.3-141.el7_4.10.x86_64.rpm qemu-kvm-1.5.3-141.el7_4.10.x86_64.rpm qemu-kvm-common-1.5.3-141.el7_4.10.x86_64.rpm qemu-kvm-debuginfo-1.5.3-141.el7_4.10.x86_64.rpm qemu-kvm-tools-1.5.3-141.el7_4.10.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 7.4): Source: qemu-kvm-1.5.3-141.el7_4.10.src.rpm ppc64: qemu-img-1.5.3-141.el7_4.10.ppc64.rpm qemu-kvm-debuginfo-1.5.3-141.el7_4.10.ppc64.rpm ppc64le: qemu-img-1.5.3-141.el7_4.10.ppc64le.rpm qemu-kvm-debuginfo-1.5.3-141.el7_4.10.ppc64le.rpm x86_64: qemu-img-1.5.3-141.el7_4.10.x86_64.rpm qemu-kvm-1.5.3-141.el7_4.10.x86_64.rpm qemu-kvm-common-1.5.3-141.el7_4.10.x86_64.rpm qemu-kvm-debuginfo-1.5.3-141.el7_4.10.x86_64.rpm qemu-kvm-tools-1.5.3-141.el7_4.10.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2018-12126 https://access.redhat.com/security/cve/CVE-2018-12127 https://access.redhat.com/security/cve/CVE-2018-12130 https://access.redhat.com/security/cve/CVE-2019-11091 https://access.redhat.com/security/vulnerabilities/mds https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2019 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBXNsSVNzjgjWX9erEAQiXQQ//Uu1syzSGpDi6dgh4btMzKTLWEluRQE15 ERIN3qbzOOdAuH9hop0I1JAPVjYtTYRvDekYSNUKwOC1/DTLmeblCRLuxMBs3Hkh 3N8T49rfZgESGpZ+F5yfsJk3ZmFdv9FGvZtvMv32HG/xlqW35WmFvgs5zpZsO3OA UNDLhyhfdGROORliy3nFah3UVzr/jhOnpXr+4jPZ+6WJgsVVDJmMEjgtfB9mJ80G WgqfmoLApyYtco/oN7kiTsqYAXLQj0g6dfHwDnWeSfGsPXUmjfG6w0VMUyFqyZr3 7FQhgZM/4Ad9CrszU/G9mk8+pofL/I0jE3B9/SFPjhIEx2JMMatR70u1jyVZgItw U+wY3gEPxU5EyOA6DOcYmEJrngSqKSVTMPe5HL8VqQq63+zGlTLPE6qxAmYdPBIL TQq95T7csc1KiMC0rl+uUpG5skXsecWKrzbUKnPnz0JMNwuDftoEz5MEq7R1AwHW ct15ewglsW8zBdzCR9+s/p5t1qbUzi5Kd+VSiSmtYBsNR1F4QVCjREFrnYMOE/1Q a32dy7/HjHGIs4/iqEFsskeYhWNR+c8EpvClieeBHvgCcXQcNoaMYXm/V4ZeMoEm NcrTM9IHwD/tOhDajjuFkcTujYJsM6zsHWQHhz07At9UolGZRe0FkRTtohQlvMJi jNFdgvxu0bU= =B1Xr -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . (CVE-2019-11091) * QEMU: device_tree: heap buffer overflow while loading device tree blob (CVE-2018-20815) * QEMU: rtl8139: integer overflow leads to buffer overflow (CVE-2018-17958) * QEMU: net: ignore packets with large size (CVE-2018-17963) * QEMU: scsi-generic: possible OOB access while handling inquiry request (CVE-2019-6501) * QEMU: slirp: information leakage in tcp_emu() due to uninitialized stack variables (CVE-2019-9824) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: This update also fixes several bugs and adds various enhancements. Documentation for these changes is available from the Release Notes document linked to in the References section. Bugs fixed (https://bugzilla.redhat.com/): 1508708 - [data plane] Qemu-kvm core dumped when doing block-stream and block-job-cancel to a data disk with data-plane enabled 1526313 - Improve QEMU lock error info for hot-plugging same qcow2 image file twice in different target to VM 1531888 - Local VM and migrated VM on the same host can run with same RAW file as visual disk source while without shareable configured or lock manager enabled 1551486 - QEMU image locking needn't double open fd number (i.e. drop file-posix.c:s->lock_fd) 1585155 - QEMU core dumped when hotplug memory exceeding host hugepages and with discard-data=yes 1597482 - qemu crashed when disk enable the IOMMU 1598119 - "share-rw=on" does not work for luks format image 1603104 - Qemu Aborted (core dumped) for 'qemu-kvm: Failed to lock byte 100' when remote NFS or GlusterFS volume stopped during the block mirror(or block commit/stream) process 1607768 - qemu aborted when start guest with a big iothreads 1608226 - [virtual-network][mq] prompt warning "qemu-kvm: unable to start vhost net: 14: falling back on userspace virtio" when boot with win8+ guests with multi-queue 1610461 - High Host CPU load for Windows 10 Guests (Update 1803) when idle 1614302 - qemu-kvm: Could not find keytab file: /etc/qemu/krb5.tab: No such file or directory 1614610 - Guest quit with error when hotunplug cpu 1619778 - Ballooning is incompatible with vfio assigned devices, but not prevented 1620373 - Failed to do migration after hotplug and hotunplug the ivshmem device 1623986 - block-commit can't be used with -blockdev 1624009 - allow backing of pflash via -blockdev 1627272 - boot guest with q35+vIOMMU+ device assignment, qemu crash when return assigned network devices from vfio driver to ixgbe in guest 1628098 - [Intel 7.7 BUG][KVM][Crystal Ridge]object_get_canonical_path_component: assertion failed: (obj->parent != NULL) 1629056 - qemu NBD server failure with block status of dirty bitmaps 1629717 - qemu_ram_mmap: Assertion `is_power_of_2(align)' failed 1629720 - [Intel 7.6 BUG][Crystal Ridge] pc_dimm_get_free_addr: assertion failed: (QEMU_ALIGN_UP(address_space_start, align) == address_space_start) 1631052 - x-block-dirty-bitmap-merge into a disabled bitmap dest causes assert 1631227 - Qemu Core dump when quit vm that's in status "paused(io-error)" with data plane enabled 1631615 - Wrong werror default for -device drive=<node-name> 1631877 - qemu dirty bitmap merge fails to update count 1633150 - Cross migration from RHEL7.5 to RHEL7.6 fails with cpu flag stibp 1633536 - Qemu core dump when do migration after hot plugging a backend image with 'blockdev-add'(without the frontend) 1636712 - CVE-2018-17958 QEMU: rtl8139: integer overflow leads to buffer overflow 1636777 - CVE-2018-17963 QEMU: net: ignore packets with large size 1642551 - qemu-kvm-tools-rhev depends on libxkbcommon, but the RPM-level dependency is missing 1646781 - CVE-2018-12126 hardware: Microarchitectural Store Buffer Data Sampling (MSBDS) 1646784 - CVE-2018-12130 hardware: Microarchitectural Fill Buffer Data Sampling (MFBDS) 1648236 - QEMU doesn't expose rendernode option for egl-headless display type 1656913 - qcow2 cache is too small 1666336 - severe performance impact using encrypted Cinder volume (QEMU luks) 1666884 - persistent bitmaps prevent qcow2 image resize 1667320 - -blockdev: auto-read-only is ineffective for drivers on read-only whitelist 1667782 - CVE-2018-12127 hardware: Micro-architectural Load Port Data Sampling - Information Leak (MLPDS) 1668160 - CVE-2019-6501 QEMU: scsi-generic: possible OOB access while handling inquiry request 1668956 - incremental backup bitmap API needs a finalized interface 1672010 - [RHEL7]Qemu coredump when remove a persistent bitmap after vm re-start(dataplane enabled) 1673080 - "An unknown error has occurred" when using cdrom to install the system with two blockdev disks.(when choose installation destination) 1673397 - [RHEL.7] qemu-kvm core dumped after hotplug the deleted disk with iothread parameter 1673402 - Qemu core dump when start guest with two disks using same drive 1676728 - RHEL77: Run iotests as part of build process 1677073 - Backport additional QEMU 4.0 Bitmap API changes to RHEL 7.7 1678515 - CVE-2019-9824 QEMU: slirp: information leakage in tcp_emu() due to uninitialized stack variables 1685989 - Add facility to use block jobs with backing images without write permission 1691009 - NBD pull mode incremental backup API needs a finalized interface 1691018 - Fix iotest 226 for local development builds 1691048 - Add qemu-img info support for querying bitmaps offline 1691563 - QEMU NBD Feature parity roundup (QEMU 3.1.0) 1692018 - qemu-img: Protocol error: simple reply when structured reply chunk was expected 1693101 - CVE-2018-20815 QEMU: device_tree: heap buffer overflow while loading device tree blob 1703916 - Qemu core dump when quit vm after forbidden to do backup with a read-only bitmap 1705312 - CVE-2019-11091 hardware: Microarchitectural Data Sampling Uncacheable Memory (MDSUM) 1714160 - Guest with 'reservations' for a disk start failed 6. Relevant releases/architectures: RHV-M 4.3 - noarch 3. It includes the configuration of the Red Hat Support plugin, copying downstream-only artifacts to the ISO domain, and links to the knowledgebase and other support material. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202003-56 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: Xen: Multiple vulnerabilities Date: March 25, 2020 Bugs: #686024, #699048, #699996, #702644 ID: 202003-56 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in Xen, the worst of which could allow for privilege escalation. Background ========== Xen is a bare-metal hypervisor. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-emulation/xen < 4.12.0-r1 >= 4.12.0-r1 2 app-emulation/xen-tools < 4.12.0-r1 >= 4.12.0-r1 ------------------------------------------------------------------- 2 affected packages Description =========== Multiple vulnerabilities have been discovered in Xen. Please review the referenced CVE identifiers for details. Workaround ========== There is no known workaround at this time. Resolution ========== All Xen users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-emulation/xen-4.12.0-r1" References ========== [ 1 ] CVE-2018-12126 https://nvd.nist.gov/vuln/detail/CVE-2018-12126 [ 2 ] CVE-2018-12127 https://nvd.nist.gov/vuln/detail/CVE-2018-12127 [ 3 ] CVE-2018-12130 https://nvd.nist.gov/vuln/detail/CVE-2018-12130 [ 4 ] CVE-2018-12207 https://nvd.nist.gov/vuln/detail/CVE-2018-12207 [ 5 ] CVE-2018-12207 https://nvd.nist.gov/vuln/detail/CVE-2018-12207 [ 6 ] CVE-2019-11091 https://nvd.nist.gov/vuln/detail/CVE-2019-11091 [ 7 ] CVE-2019-11135 https://nvd.nist.gov/vuln/detail/CVE-2019-11135 [ 8 ] CVE-2019-18420 https://nvd.nist.gov/vuln/detail/CVE-2019-18420 [ 9 ] CVE-2019-18421 https://nvd.nist.gov/vuln/detail/CVE-2019-18421 [ 10 ] CVE-2019-18423 https://nvd.nist.gov/vuln/detail/CVE-2019-18423 [ 11 ] CVE-2019-18424 https://nvd.nist.gov/vuln/detail/CVE-2019-18424 [ 12 ] CVE-2019-18425 https://nvd.nist.gov/vuln/detail/CVE-2019-18425 [ 13 ] CVE-2019-19577 https://nvd.nist.gov/vuln/detail/CVE-2019-19577 [ 14 ] CVE-2019-19578 https://nvd.nist.gov/vuln/detail/CVE-2019-19578 [ 15 ] CVE-2019-19580 https://nvd.nist.gov/vuln/detail/CVE-2019-19580 [ 16 ] CVE-2019-19581 https://nvd.nist.gov/vuln/detail/CVE-2019-19581 [ 17 ] CVE-2019-19582 https://nvd.nist.gov/vuln/detail/CVE-2019-19582 [ 18 ] CVE-2019-19583 https://nvd.nist.gov/vuln/detail/CVE-2019-19583 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202003-56 Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2020 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5 . ========================================================================== Ubuntu Security Notice USN-3982-2 May 14, 2019 linux-lts-xenial vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 ESM 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-3982-1 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 for Ubuntu 14.04 LTS. Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Giorgi Maisuradze, Dan Horea Lutas, Andrei Lutas, Volodymyr Pikhur, Stephan van Schaik, Alyssa Milburn, Sebastian \xd6sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Moritz Lipp, Michael Schwarz, and Daniel Gruss discovered that memory previously stored in microarchitectural fill buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. (CVE-2018-12130) Brandon Falk, Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Stephan van Schaik, Alyssa Milburn, Sebastian \xd6sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, and Cristiano Giuffrida discovered that memory previously stored in microarchitectural load ports of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. (CVE-2018-12127) Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Marina Minkin, Daniel Moghimi, Moritz Lipp, Michael Schwarz, Jo Van Bulck, Daniel Genkin, Daniel Gruss, Berk Sunar, Frank Piessens, and Yuval Yarom discovered that memory previously stored in microarchitectural store buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. (CVE-2018-12126) Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Volodrmyr Pikhur, Moritz Lipp, Michael Schwarz, Daniel Gruss, Stephan van Schaik, Alyssa Milburn, Sebastian \xd6sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, and Cristiano Giuffrida discovered that uncacheable memory previously stored in microarchitectural buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. (CVE-2019-11091) Matteo Croce, Natale Vinto, and Andrea Spagnolo discovered that the cgroups subsystem of the Linux kernel did not properly account for SCTP socket buffers. A local attacker could use this to cause a denial of service (system crash). (CVE-2019-3874) Alex Williamson discovered that the vfio subsystem of the Linux kernel did not properly limit DMA mappings. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-3882) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM: linux-image-4.4.0-148-generic 4.4.0-148.174~14.04.1 linux-image-4.4.0-148-generic-lpae 4.4.0-148.174~14.04.1 linux-image-4.4.0-148-lowlatency 4.4.0-148.174~14.04.1 linux-image-4.4.0-148-powerpc-e500mc 4.4.0-148.174~14.04.1 linux-image-4.4.0-148-powerpc-smp 4.4.0-148.174~14.04.1 linux-image-4.4.0-148-powerpc64-emb 4.4.0-148.174~14.04.1 linux-image-4.4.0-148-powerpc64-smp 4.4.0-148.174~14.04.1 linux-image-generic-lpae-lts-xenial 4.4.0.148.130 linux-image-generic-lts-xenial 4.4.0.148.130 linux-image-lowlatency-lts-xenial 4.4.0.148.130 linux-image-powerpc-e500mc-lts-xenial 4.4.0.148.130 linux-image-powerpc-smp-lts-xenial 4.4.0.148.130 linux-image-powerpc64-emb-lts-xenial 4.4.0.148.130 linux-image-powerpc64-smp-lts-xenial 4.4.0.148.130 linux-image-virtual-lts-xenial 4.4.0.148.130 After a standard system update you need to reboot your computer to make all the necessary changes. Please note that fully mitigating the Microarchitectural Data Sampling (MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and CVE-2019-11091) requires corresponding processor microcode/firmware updates or, in virtual environments, hypervisor updates. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - ------------------------------------------------------------------------- Debian Security Advisory DSA-4444-1 security@debian.org https://www.debian.org/security/ Salvatore Bonaccorso May 14, 2019 https://www.debian.org/security/faq - ------------------------------------------------------------------------- Package : linux CVE ID : CVE-2018-12126 CVE-2018-12127 CVE-2018-12130 CVE-2019-11091 Debian Bug : 928125 Multiple researchers have discovered vulnerabilities in the way the Intel processor designs have implemented speculative forwarding of data filled into temporary microarchitectural structures (buffers). This flaw could allow an attacker controlling an unprivileged process to read sensitive information, including from the kernel and all other processes running on the system or cross guest/host boundaries to read host memory. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html for more details. To fully resolve these vulnerabilities it is also necessary to install updated CPU microcode. An updated intel-microcode package (only available in Debian non-free) will be provided via a separate DSA. The updated CPU microcode may also be available as part of a system firmware ("BIOS") update. In addition, this update includes a fix for a regression causing deadlocks inside the loopback driver, which was introduced by the update to 4.9.168 in the last Stretch point release. For the stable distribution (stretch), these problems have been fixed in version 4.9.168-1+deb9u2. We recommend that you upgrade your linux packages. For the detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEERkRAmAjBceBVMd3uBUy48xNDz0QFAlzbK/hfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDQ2 NDQ0MDk4MDhDMTcxRTA1NTMxRERFRTA1NENCOEYzMTM0M0NGNDQACgkQBUy48xND z0RDbhAAkCG4A3Yx+lAGMIgm9lXWeacyTFQ7RhS0NzQ+7rewiQZti4JphoEnuub1 sq9GH041twKbQQKJiuRD7AvKIzt8hfziQVBvIs+Nojp3fOHU9TIDqqENmfBYflkQ qvP/tP5vqXREMihV6zGAzK47lfIvEztAQYiZymD4zMzWF0QrY/9/uEQFgwgD5AaP xvreR+M2tsWQR3MZOAfWlTbX9nSbyV2K7nULs5y+g0ko8sbJDxNhfKO/6yauSiHK pq6I3Fg56PsNtse/r/II9jlGE9DYvC+cI9vRNEBZep9A0dmRqN8j3sk0jmNVfi/F Tm3jWFgtRtaa6ANMeBHIBQzkGjML6GbE68Iyf0+EGZ7ZrXSeAIi4InYFCNJA7w5/ K0Nu2nCMAaxVwYPAO7mvNxAnKgOPLE+e7fYNlqztpHOO/nXNmOG7zknqstlkS+Vc LfsjAiqtAGw6PubdXMSc5BVrdQQTmT3tvqg4BW2i3bWeaW43MyQRc1cizplVrNLt KKgC1qNLGIvSZLejDF5KXX8VT50UEa05QshRHWu9Ckkvid2hedzipZkTsN5tsRoc XuCtYsbZqawHmExfyryqtkhTc4pti2nvHPzcMpJtmXtdkkvxh3ZYXbTR0vsSwJHt rLY3ms+Sw/DT0kdXgEb1gz4prezXcINgPhGDiP/hbRaQnsP2x7U= =ukU9 -----END PGP SIGNATURE----- . These CVEs are security vulnerabilities caused by flaws in the design of speculative execution hardware in the computer's CPU. Details on the vulnerability and our response can be found here: https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS Due to the high complexity of the fixes and the need for a corresponding CPU microcode update for a complete fix, we are unable to livepatch these CVEs. Please plan to reboot into an updated kernel as soon as possible. Users running Ubuntu 16.04 LTS or 14.04 LTS should upgrade to kernel version 4.4.0-148.174 or later. References: CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and CVE-2019-11091 -- ubuntu-security-announce mailing list ubuntu-security-announce@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security-announce

IOT TAXONOMY

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

information disclosure

PATCH