CVE-2018-19961

An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes...

CVE-2018-19962: Exposure of Sensitive Information to an Unauthorized Actor

An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because small IOMMU mappings are unsafely combined into larger ones...

CVE-2018-19961: Incomplete Cleanup

An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes...

PT-2018-2671

Name of the Vulnerable Software and Affected Versions Xen versions prior to 4.12 Description An issue in Xen on AMD x86 platforms allows guest OS users to potentially gain host OS privileges due to the unsafe combination of small IOMMU mappings into larger ones. This could enable an attacker to...

PT-2018-2670

Name of the Vulnerable Software and Affected Versions Xen versions prior to 4.12 Description An issue in Xen on AMD x86 platforms may allow guest OS users to gain host OS privileges due to TLB flushes not always occurring after IOMMU mapping changes. The vulnerability is related to an incorrect T...

MCExtractor - Intel, AMD, VIA & Freescale Microcode Extraction Tool

Intel, AMD, VIA & Freescale Microcode Extraction Tool MC Extractor News Feed MC Extractor Discussion Topic Intel, AMD & VIA CPU Microcode Repositories A. About MC Extractor MC Extractor is a tool which parses Intel, AMD, VIA and Freescale processor microcode binaries. It can be used by end-users...

x86: DoS from attempting to use INVPCID with a non-canonical addresses

ISSUE DESCRIPTION The INVPCID instruction raises GP0 if an attempt is made to invalidate a non-canonical address. Older flushing mechanisms such as INVLPG tolerate this without error, and perform no action. There is one guest accessible path in Xen where a non-canonical address was passed into th...

insufficient TLB flushing / improper large page mappings with AMD IOMMUs

ISSUE DESCRIPTION In order to be certain that no undue access to memory is possible anymore after IOMMU mappings of this memory have been removed, Translation Lookaside Buffers TLBs need to be flushed after most changes to such mappings. Xen bypassed certain IOMMU flushes on AMD x86 hardware...

7 New Meltdown and Spectre-type CPU Flaws Affect Intel, AMD, ARM CPUs

Disclosed earlier this year, potentially dangerous Meltdown and Spectre vulnerabilities that affected a large family of modern processors proven that speculative execution attacks can be exploited in a trivial way to access highly sensitive information. Since then, several more variants of...

7 New Meltdown and Spectre-type CPU Flaws Affect Intel, AMD, ARM CPUs

Disclosed earlier this year, potentially dangerous Meltdown and Spectre vulnerabilities that affected a large family of modern processors proven that speculative execution attacks can be exploited in a trivial way to access highly sensitive information. Since then, several more variants of...

November 13, 2018—KB4467700 (Security-only update)

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November 13, 2018—KB4467678 (Security-only update)

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November 13, 2018—KB4467701 (Monthly Rollup)

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November 13, 2018—KB4467703 (Security-only update)

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November 13, 2018—KB4467706 (Monthly Rollup)

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guest use of HLE constructs may lock up host

ISSUE DESCRIPTION Various Intel CPU models have an erratum listed under the title "Processor May Hang When Executing Code In an HLE Transaction". It describes a potential hang when using instructions with the XACQUIRE prefix on the host physical memory range covering the first 4 MiB starting at t...

New Intel CPU Flaw Exploits Hyper-Threading to Steal Encrypted Data

A team of security researchers has discovered another serious side-channel vulnerability in Intel CPUs that could allow an attacker to sniff out sensitive protected data, like passwords and cryptographic keys, from other processes running in the same CPU core with simultaneous multi-threading...

HPSBHF03597 rev. 3 - PortSmash Side-Channel Vulnerability

Potential Security Impact Information disclosure. Source: HP, HP Product Security Response Team PSRT Reported By: Tampere University of Technology, Finland and Technical University, Cuba VULNERABILITY SUMMARY An industry-wide vulnerability has been reported which impacts CPUs that use Simultaneou...

F5 Networks BIG-IP : Lazy FP state restore vulnerability (K21344224)

The version of F5 Networks BIG-IP installed on the remote host is prior to 13.1.1.2 / 14.0.0.3 / 14.1.0. It is, therefore, affected by a vulnerability as referenced in the K21344224 advisory. System software utilizing Lazy FP state restore technique on systems using Intel Core-based microprocesso...

qemu security update

12:2.9.0-17.el7 - i386: Remove generic SMT thread check Babu Moger Orabug: 28676425 - pc: Fix typo on PCCOMPAT212 Eduardo Habkost Orabug: 28676425 - i386: Enable TOPOEXT feature on AMD EPYC CPU Babu Moger Orabug: 28676425 - net: ignore packet size greater than INTMAX Jason Wang Orabug: 28762625...