ID

VAR-201905-1248

CVE

CVE-2019-11091

TITLE

Microarchitectural Data Sampling Uncacheable Memory Vulnerable to information disclosure

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. ========================================================================== Ubuntu Security Notice USN-3980-1 May 14, 2019 linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-raspi2 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.10 Summary: Several security issues were fixed in the Linux kernel. 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-raspi2: Linux kernel for Raspberry Pi 2 Details: 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) Vasily Averin and Evgenii Shatokhin discovered that a use-after-free vulnerability existed in the NFS41+ subsystem when multiple network namespaces are in use. A local attacker in a container could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-16884) 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) Marc Orr discovered that the KVM hypervisor implementation in the Linux kernel did not properly restrict APIC MSR register values when nested virtualization is used. An attacker in a guest vm could use this to cause a denial of service (host OS crash). (CVE-2019-3887) Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux kernel contained a head puffer overflow. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-9500) Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux kernel did not properly prevent remote firmware events from being processed for USB Wifi devices. A physically proximate attacker could use this to send firmware events to the device. (CVE-2019-9503) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.10: linux-image-4.18.0-1011-gcp 4.18.0-1011.12 linux-image-4.18.0-1012-kvm 4.18.0-1012.12 linux-image-4.18.0-1014-raspi2 4.18.0-1014.16 linux-image-4.18.0-1016-aws 4.18.0-1016.18 linux-image-4.18.0-1018-azure 4.18.0-1018.18 linux-image-4.18.0-20-generic 4.18.0-20.21 linux-image-4.18.0-20-generic-lpae 4.18.0-20.21 linux-image-4.18.0-20-lowlatency 4.18.0-20.21 linux-image-4.18.0-20-snapdragon 4.18.0-20.21 linux-image-aws 4.18.0.1016.16 linux-image-azure 4.18.0.1018.19 linux-image-gcp 4.18.0.1011.11 linux-image-generic 4.18.0.20.21 linux-image-generic-lpae 4.18.0.20.21 linux-image-gke 4.18.0.1011.11 linux-image-kvm 4.18.0.1012.12 linux-image-lowlatency 4.18.0.20.21 linux-image-powerpc-e500mc 4.18.0.20.21 linux-image-powerpc-smp 4.18.0.20.21 linux-image-powerpc64-emb 4.18.0.20.21 linux-image-powerpc64-smp 4.18.0.20.21 linux-image-raspi2 4.18.0.1014.11 linux-image-snapdragon 4.18.0.20.21 linux-image-virtual 4.18.0.20.21 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. (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. Description: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Bug Fix(es): * update the MRG 2.5.z 3.10 kernel-rt sources (BZ#1692711) 4. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm security update Advisory ID: RHSA-2019:1178-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2019:1178 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. 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 Client (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - x86_64 Red Hat Enterprise Linux Workstation (v. 7) - 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. Package List: Red Hat Enterprise Linux Client (v. 7): Source: qemu-kvm-1.5.3-160.el7_6.2.src.rpm x86_64: qemu-img-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-tools-1.5.3-160.el7_6.2.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): Source: qemu-kvm-1.5.3-160.el7_6.2.src.rpm x86_64: qemu-img-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-tools-1.5.3-160.el7_6.2.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: qemu-kvm-1.5.3-160.el7_6.2.src.rpm x86_64: qemu-img-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-tools-1.5.3-160.el7_6.2.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: qemu-kvm-1.5.3-160.el7_6.2.src.rpm x86_64: qemu-img-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm qemu-kvm-tools-1.5.3-160.el7_6.2.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 iQIVAwUBXNsSltzjgjWX9erEAQgcFA/8DBugTza3qjoCHbrEa6YVc6QqGGsWdtds RH+AwYirPLgQRbQznCCVI/6AyYIdXTQDHyLNyRfbKb1nl4LMMcRHVFlTdkggCobS 3jUz1vguDv+nZdWCf0J3NuuKSC8Z9xmx0FRLUJLu07r1a3A3MnlFUMO/AOr9psna C9dnfvRD7YtbFh7TxXUalYoEexIQ3LRjCZsmRyiEzcdv8/6+s2sgDCf0aeBHIEbL EvfgmkNNqgM73ZHEoEwwcFxdWvv6CZJrKVDH3ykrWwPmbdGr5FuBONqZ8UESVmHK vCxcMP1J2HKHwG/irBNShSOcYKwePhBT+35hf8mPPJFUvCxqXuLDHt71OelQmF5z vykmsKtlrcBLodFbMrpV9lSTbZAHSAvlpqe3LjzfetWKuVMvfGlMrx4Mtfq8Avhj R9cSAAmVqj6gEuoV2s5VIaZCcRuSXVPjwJY+m+br0qTT+kymmi05cgsy7bfPvGkG rRo58yZvj6pcAJ1AoXFebTBHlSXtAPVv+VQD5BkF1BhSI8iIhn2cQNB6HM3AocHQ IVtkUvq7Yocwt0IFwoF+JmSjtKzxggDFoYrlztqbMHQ2+VIp2/aDSdcoh2r4cyuz PBAAO+VMfsJpoDAP62GdCILayzGGQV0cY3Xam/0hwFJDGmDJzuqB73yQawhmSIrT vcx66izbyys= =AYjv -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . Relevant releases/architectures: RHV-M 4.2 - 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. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 LTS. (CVE-2019-11091) 4

IOT TAXONOMY

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

information disclosure

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2024-12-21T19:51:56.639000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE