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CVE-2018-3646

Status Candidate

Overview

Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access with guest OS privilege via a terminal page fault and a side-channel analysis.

Related Files

Ubuntu Security Notice USN-3823-1
Posted Nov 15, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3823-1 - It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault. A local attacker in a guest virtual machine could use this to expose sensitive information. It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2018-3620, CVE-2018-3646
MD5 | 6b37d20c06583bdf2df8bbda520645eb
Apple Security Advisory 2018-10-30-9
Posted Oct 31, 2018
Authored by Apple | Site apple.com

Apple Security Advisory 2018-10-30-9 - macOS Mojave 10.14 addresses buffer overflow, code execution, denial of service, and information leakage vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability, code execution
systems | apple
advisories | CVE-2015-3194, CVE-2015-5333, CVE-2015-5334, CVE-2016-1777, CVE-2017-12613, CVE-2017-12618, CVE-2018-3639, CVE-2018-3646, CVE-2018-4126, CVE-2018-4153, CVE-2018-4203, CVE-2018-4295, CVE-2018-4304, CVE-2018-4308, CVE-2018-4310, CVE-2018-4321, CVE-2018-4324, CVE-2018-4326, CVE-2018-4331, CVE-2018-4332, CVE-2018-4333, CVE-2018-4334, CVE-2018-4336, CVE-2018-4337, CVE-2018-4338, CVE-2018-4340, CVE-2018-4341
MD5 | 11701ebf662e62c543b6d5d6904f76fc
Apple Security Advisory 2018-10-30-2
Posted Oct 31, 2018
Authored by Apple | Site apple.com

Apple Security Advisory 2018-10-30-2 - macOS Mojave 10.14.1, Security Update 2018-001 High Sierra, and Security Update 2018-005 Sierra are now available and address buffer overflow, code execution, denial of service, and information leakage vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability, code execution
systems | apple
advisories | CVE-2017-10784, CVE-2017-12613, CVE-2017-12618, CVE-2017-14033, CVE-2017-14064, CVE-2017-17405, CVE-2017-17742, CVE-2018-3639, CVE-2018-3640, CVE-2018-3646, CVE-2018-4126, CVE-2018-4153, CVE-2018-4203, CVE-2018-4242, CVE-2018-4259, CVE-2018-4286, CVE-2018-4287, CVE-2018-4288, CVE-2018-4291, CVE-2018-4295, CVE-2018-4304, CVE-2018-4308, CVE-2018-4310, CVE-2018-4326, CVE-2018-4331, CVE-2018-4334, CVE-2018-4340
MD5 | 8c8e8b2371c732c8c18cc33fbce89068
Gentoo Linux Security Advisory 201810-06
Posted Oct 31, 2018
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201810-6 - Multiple vulnerabilities have been found in Xen, the worst of which could cause a Denial of Service condition. Versions less than 4.10.1-r2 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2017-5715, CVE-2017-5753, CVE-2017-5754, CVE-2018-10471, CVE-2018-10472, CVE-2018-10981, CVE-2018-10982, CVE-2018-12891, CVE-2018-12892, CVE-2018-12893, CVE-2018-15468, CVE-2018-15469, CVE-2018-15470, CVE-2018-3620, CVE-2018-3646, CVE-2018-5244, CVE-2018-7540, CVE-2018-7541, CVE-2018-7542
MD5 | 9eda1febf30dabcc3f4d7adedc9b7802
Kernel Live Patch Security Notice LSN-0044-1
Posted Oct 8, 2018
Authored by Benjamin M. Romer

It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault (L1TF). A local attacker could use this to expose sensitive information (memory from the kernel or other processes). It was discovered that the paravirtualization implementation in the Linux kernel did not properly handle some indirect calls, reducing the effectiveness of Spectre v2 mitigations for paravirtual guests. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, local
systems | linux
advisories | CVE-2018-14633, CVE-2018-15572, CVE-2018-15594, CVE-2018-17182, CVE-2018-3620, CVE-2018-3646, CVE-2018-6555
MD5 | 5e82c0eddd3c443fb7cd4484b02a8b65
Red Hat Security Advisory 2018-2602-01
Posted Aug 30, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2602-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include memory vulnerabilities.

tags | advisory, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-3620, CVE-2018-3646
MD5 | 63470689b69ed53eeda0b6f2c3c15438
Red Hat Security Advisory 2018-2603-01
Posted Aug 29, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2603-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include memory vulnerabilities.

tags | advisory, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-3620, CVE-2018-3646
MD5 | 3cdec497fa605c547651f469691a0e91
Ubuntu Security Notice USN-3756-1
Posted Aug 28, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3756-1 - It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault. A local attacker in a guest virtual machine could use this to expose sensitive information. 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. Various other issues were also addressed.

tags | advisory, kernel, local
systems | linux, ubuntu
advisories | CVE-2018-3639, CVE-2018-3640, CVE-2018-3646
MD5 | 0beb2e2ffd5d058e98df53cffa756afb
Ubuntu Security Notice USN-3742-3
Posted Aug 21, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3742-3 - USN-3742-2 introduced mitigations in the Linux Hardware Enablement kernel for Ubuntu 12.04 ESM to address L1 Terminal Fault vulnerabilities. Unfortunately, the update introduced regressions that caused kernel panics when booting in some environments as well as preventing Java applications from starting. This update fixes the problems. Various other issues were also addressed.

tags | advisory, java, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-18344, CVE-2018-3620, CVE-2018-3646, CVE-2018-5390, CVE-2018-5391
MD5 | 5184a56084d4f6684863c627c85bd1a7
Debian Security Advisory 4279-1
Posted Aug 20, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4279-1 - Multiple researchers have discovered a vulnerability in the way the Intel processor designs have implemented speculative execution of instructions in combination with handling of page-faults. This flaw could allow an attacker controlling an unprivileged process to read memory from arbitrary (non-user controlled) addresses, including from the kernel and all other processes running on the system or cross guest/host boundaries to read host memory.

tags | advisory, arbitrary, kernel
systems | linux, debian
advisories | CVE-2018-3620, CVE-2018-3646
MD5 | aab9fef60b5c6ccfcb3e7fcbbcf56798
Ubuntu Security Notice USN-3741-3
Posted Aug 18, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3741-3 - USN-3741-1 introduced mitigations in the Linux kernel for Ubuntu 14.04 LTS to address L1 Terminal Fault vulnerabilities. Unfortunately, the update introduced regressions that caused kernel panics when booting in some environments as well as preventing Java applications from starting. This update fixes the problems. Various other issues were also addressed.

tags | advisory, java, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-3646
MD5 | 78bd7446a67ac87a2da4cf6fe7c112df
Debian Security Advisory 4274-1
Posted Aug 17, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4274-1 - This update provides mitigations for the "L1 Terminal Fault" vulnerability affecting a range of Intel CPUs.

tags | advisory
systems | linux, debian
advisories | CVE-2018-3620, CVE-2018-3646
MD5 | b243cebc6d70476d0666dc109c93f67f
Red Hat Security Advisory 2018-2402-01
Posted Aug 16, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2402-01 - The RHV-M Virtual Appliance automates the process of installing and configuring the Red Hat Virtualization Manager. The appliance is available to download as an OVA file from the Customer Portal. Issues addressed include a denial of service vulnerability.

tags | advisory, denial of service
systems | linux, redhat
advisories | CVE-2018-3620, CVE-2018-3646, CVE-2018-5390
MD5 | ea9ca1c54f770ab4029aae155fd6fe6e
Red Hat Security Advisory 2018-2404-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2404-01 - The rhev-hypervisor7 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine hypervisor. It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent. Issues addressed include an L1TF problem.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2018-3620, CVE-2018-3646
MD5 | 1ba1bf5b29a8e82d20f2e3ff4597caa3
Red Hat Security Advisory 2018-2403-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2403-01 - The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. Issues addressed include a denial of service vulnerability.

tags | advisory, denial of service
systems | linux, redhat
advisories | CVE-2018-3620, CVE-2018-3646, CVE-2018-5390
MD5 | a095127f014bb4ceab1d6e252b903fe7
FreeBSD Security Advisory - FreeBSD-SA-18:09.l1tf
Posted Aug 15, 2018
Site security.freebsd.org

FreeBSD Security Advisory - On certain Intel 64-bit x86 systems there is a period of time during terminal fault handling where the CPU may use speculative execution to try to load data. The CPU may speculatively access the level 1 data cache (L1D). Data which would otherwise be protected may then be determined by using side channel methods. This issue affects bhyve on FreeBSD/amd64 systems. An attacker executing user code, or kernel code inside of a virtual machine, may be able to read secret data from the kernel or from another virtual machine.

tags | advisory, x86, kernel
systems | freebsd, bsd
advisories | CVE-2018-3620, CVE-2018-3646
MD5 | d2d8d94bd9c95b68c83e957598d1c85c
Ubuntu Security Notice USN-3742-2
Posted Aug 15, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3742-2 - USN-3742-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 14.04 for Ubuntu 12.04 ESM. It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault. A local attacker in a guest virtual machine could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-18344, CVE-2018-3620, CVE-2018-3646, CVE-2018-5390, CVE-2018-5391
MD5 | 8765eb216afec68e03e4729f603e2423
Ubuntu Security Notice USN-3741-2
Posted Aug 15, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3741-2 - USN-3741-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault. A local attacker in a guest virtual machine could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-3620, CVE-2018-3646, CVE-2018-5390, CVE-2018-5391
MD5 | a0d39dbb79e2f19019b21e3f47cfbcee
Ubuntu Security Notice USN-3742-1
Posted Aug 15, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3742-1 - It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault. A local attacker in a guest virtual machine could use this to expose sensitive information. It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2017-18344, CVE-2018-3620, CVE-2018-3646, CVE-2018-5390, CVE-2018-5391
MD5 | 0bb27e1ab89c610a43b666ee9c098afd
Ubuntu Security Notice USN-3741-1
Posted Aug 15, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3741-1 - It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault. A local attacker in a guest virtual machine could use this to expose sensitive information. It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2018-3620, CVE-2018-3646, CVE-2018-5390, CVE-2018-5391
MD5 | adb44b3c97e09a1c8c3883fb1c76b23f
Ubuntu Security Notice USN-3740-2
Posted Aug 15, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3740-2 - USN-3740-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS. It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault. A local attacker in a guest virtual machine could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-3620, CVE-2018-3646, CVE-2018-5391
MD5 | af22cc41875cbf38e938fba21964205a
Ubuntu Security Notice USN-3740-1
Posted Aug 15, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3740-1 - It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault. A local attacker in a guest virtual machine could use this to expose sensitive information. It was discovered that memory present in the L1 data cache of an Intel CPU core may be exposed to a malicious process that is executing on the CPU core. This vulnerability is also known as L1 Terminal Fault. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2018-3620, CVE-2018-3646, CVE-2018-5391
MD5 | 1996e4f32e8fd7c1ba60b8a9ec50cc26
Red Hat Security Advisory 2018-2391-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2391-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a speculative execution vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2018-10901, CVE-2018-3620, CVE-2018-3646
MD5 | 31aae57342942241eb7b2e83ce29304c
Red Hat Security Advisory 2018-2389-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2389-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a speculative execution vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2018-3620, CVE-2018-3646
MD5 | ab4b463ebe68414fc69f4d7af6ab178e
Red Hat Security Advisory 2018-2395-01
Posted Aug 15, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-2395-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include bypass, denial of service, and use-after-free vulnerabilities.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2017-13215, CVE-2018-10675, CVE-2018-3620, CVE-2018-3646, CVE-2018-3693, CVE-2018-5390, CVE-2018-7566
MD5 | dd0004dd825e5ff2095aeec5aa67d5fb
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