ID

VAR-201808-0958

CVE

CVE-2018-3620

TITLE

Intel processors are vulnerable to a speculative execution side-channel attack called L1 Terminal Fault (L1TF)

DESCRIPTION

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 via a terminal page fault and a side-channel analysis. These attacks are known as L1 Terminal Fault: SGX, L1 Terminal Fault: OS/SMM, and L1 Terminal Fault: VMM. Intel Core Systems with microprocessors contain information disclosure vulnerabilities.Information may be obtained. Intel Core i3 processor, etc. are all CPU (central processing unit) products of Intel Corporation of the United States. Security vulnerabilities exist in several Intel products that use speculative execution and address translation. The following products are affected: Intel Core i3 processor; Intel Core i5 processor; Intel Core i7 processor; Intel Core M processor family; 2nd generation Intel Core processors; 3rd generation Intel Core processors; 4th generation Intel Core processors; 5th generation Intel Core processors, etc. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: kernel security update Advisory ID: RHSA-2018:2389-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:2389 Issue date: 2018-08-14 CVE Names: CVE-2018-3620 CVE-2018-3646 ==================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 7.2 Advanced Update Support, Red Hat Enterprise Linux 7.2 Telco Extended Update Support, and Red Hat Enterprise Linux 7.2 Update Services for SAP Solutions. 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 Server AUS (v. 7.2) - noarch, x86_64 Red Hat Enterprise Linux Server E4S (v. 7.2) - noarch, ppc64le, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 7.2) - x86_64 Red Hat Enterprise Linux Server Optional E4S (v. 7.2) - ppc64le, x86_64 Red Hat Enterprise Linux Server Optional TUS (v. 7.2) - x86_64 Red Hat Enterprise Linux Server TUS (v. 7.2) - noarch, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646) Red Hat would like to thank Intel OSSIRT (Intel.com) for reporting these issues. 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 The system must be rebooted for this update to take effect. 5. Package List: Red Hat Enterprise Linux Server AUS (v. 7.2): Source: kernel-3.10.0-327.71.4.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-327.71.4.el7.noarch.rpm kernel-doc-3.10.0-327.71.4.el7.noarch.rpm x86_64: kernel-3.10.0-327.71.4.el7.x86_64.rpm kernel-debug-3.10.0-327.71.4.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.71.4.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.71.4.el7.x86_64.rpm kernel-devel-3.10.0-327.71.4.el7.x86_64.rpm kernel-headers-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.71.4.el7.x86_64.rpm perf-3.10.0-327.71.4.el7.x86_64.rpm perf-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm python-perf-3.10.0-327.71.4.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm Red Hat Enterprise Linux Server E4S (v. 7.2): Source: kernel-3.10.0-327.71.4.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-327.71.4.el7.noarch.rpm kernel-doc-3.10.0-327.71.4.el7.noarch.rpm ppc64le: kernel-3.10.0-327.71.4.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-327.71.4.el7.ppc64le.rpm kernel-debug-3.10.0-327.71.4.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-327.71.4.el7.ppc64le.rpm kernel-debuginfo-3.10.0-327.71.4.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-327.71.4.el7.ppc64le.rpm kernel-devel-3.10.0-327.71.4.el7.ppc64le.rpm kernel-headers-3.10.0-327.71.4.el7.ppc64le.rpm kernel-tools-3.10.0-327.71.4.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-327.71.4.el7.ppc64le.rpm kernel-tools-libs-3.10.0-327.71.4.el7.ppc64le.rpm perf-3.10.0-327.71.4.el7.ppc64le.rpm perf-debuginfo-3.10.0-327.71.4.el7.ppc64le.rpm python-perf-3.10.0-327.71.4.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-327.71.4.el7.ppc64le.rpm x86_64: kernel-3.10.0-327.71.4.el7.x86_64.rpm kernel-debug-3.10.0-327.71.4.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.71.4.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.71.4.el7.x86_64.rpm kernel-devel-3.10.0-327.71.4.el7.x86_64.rpm kernel-headers-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.71.4.el7.x86_64.rpm perf-3.10.0-327.71.4.el7.x86_64.rpm perf-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm python-perf-3.10.0-327.71.4.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm Red Hat Enterprise Linux Server TUS (v. 7.2): Source: kernel-3.10.0-327.71.4.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-327.71.4.el7.noarch.rpm kernel-doc-3.10.0-327.71.4.el7.noarch.rpm x86_64: kernel-3.10.0-327.71.4.el7.x86_64.rpm kernel-debug-3.10.0-327.71.4.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.71.4.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.71.4.el7.x86_64.rpm kernel-devel-3.10.0-327.71.4.el7.x86_64.rpm kernel-headers-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.71.4.el7.x86_64.rpm perf-3.10.0-327.71.4.el7.x86_64.rpm perf-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm python-perf-3.10.0-327.71.4.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 7.2): x86_64: kernel-debug-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.71.4.el7.x86_64.rpm perf-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional E4S (v. 7.2): ppc64le: kernel-debug-debuginfo-3.10.0-327.71.4.el7.ppc64le.rpm kernel-debug-devel-3.10.0-327.71.4.el7.ppc64le.rpm kernel-debuginfo-3.10.0-327.71.4.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-327.71.4.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-327.71.4.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-327.71.4.el7.ppc64le.rpm perf-debuginfo-3.10.0-327.71.4.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-327.71.4.el7.ppc64le.rpm x86_64: kernel-debug-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.71.4.el7.x86_64.rpm perf-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional TUS (v. 7.2): x86_64: kernel-debug-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.71.4.el7.x86_64.rpm perf-debuginfo-3.10.0-327.71.4.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.71.4.el7.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-2018-3620 https://access.redhat.com/security/cve/CVE-2018-3646 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/L1TF 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2018 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBW3M6OtzjgjWX9erEAQgXsA//fUjJD9ABgMqdEY1I+4Y28+aCtz++Rn0O lQaHCnxzStUHT401003DNrka0StFmfCSLZ7fYQF5iss9bE0dFyQaJ+UxWqEMiiJ5 eBRWolwaQjovLOs/W0ihbiOgDa4IiBmaXzJ6V2CTXC6PMFtsc5qo7fcUroQ72Exa gdXUxO4z3Ei4TTZpwLL/5xfphENXoOk0BMGw5ouAhfsiGyY/q5VWICqoKYqXvgSB S6qI85FlHVHTiMpZa7DjFygFfGsraOYkUF9Svokw2d46mzAdFHBfsY4l3esvOth0 HVdIXBhN9xoKnKI6907vGrDhNshm6E029vhLoc+R6cJIa6nFXDxIlb/PsYhGDmvE N7WVbb1ItaZn2b6RAmkhw4XSMJlGXtsbR0qQghXL0h0RB70a+DKQOrpLuJZFaxHE ETzp+i5p0xRLgyNMUHgDtSSCgb+y+ctSrCyB6ls5hV/TIuYKV3L3UhRYGaWlCWIk Ki9Iou3E8NCmHNgJlaG4g7EVnv5bXrDoww5UU79W5TDIapQXohXwSYH5TJMfyj5U 786wYzOtx1ubSM+AnJ3yXWaHgxOUv/o0NjYruO+SuXlqKw7CnlAyYJJj5kro3Yhu QuJU1xNPPhTV+608bCy/lthONMfTRZ534be+RcLw8gd1v6/WtGcZxdvNtCJ1nQ5e xxvWT3L+dPQ1KA -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . The appliance is available to download as an OVA file from the Customer Portal. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. (CVE-2018-3620, CVE-2018-3646) * A flaw named SegmentSmack was found in the way the Linux kernel handled specially crafted TCP packets. A remote attacker could use this flaw to trigger time and calculation expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() functions by sending specially modified packets within ongoing TCP sessions which could lead to a CPU saturation and hence a denial of service on the system. Maintaining the denial of service condition requires continuous two-way TCP sessions to a reachable open port, thus the attacks cannot be performed using spoofed IP addresses. To fully resolve these vulnerabilities it is also necessary to install updated CPU microcode (only available in Debian non-free). Common server class CPUs are covered in the update released as DSA 4273-1. For the stable distribution (stretch), these problems have been fixed in version 4.9.110-3+deb9u3. 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----- iQKTBAEBCgB9FiEERkRAmAjBceBVMd3uBUy48xNDz0QFAlt6p8ZfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDQ2 NDQ0MDk4MDhDMTcxRTA1NTMxRERFRTA1NENCOEYzMTM0M0NGNDQACgkQBUy48xND z0TBJg//VmtxfP6VLm5Q2hHuOlUejrc2W4hOcNRR0Ud7DjJ0B5Gfb9y/u1k+RXBj akX5/Csi6l+kLOWs4/amX3VAxdQRYFL6eEJBNZzlCkBasu1DpkvJdL9F0EP9gru7 Xd/StpSQs8GaBAlklQsckHtKqPzhB5D56gLosLupfmdNovlRKPhX282Ae5JCgjyf BjQv7Oa5K+pUw7F4sZUsdTPZHvl3bZ14u2SDzkIYX6K0KSRi3r4kBNGlRkCnRUTd AW8LpC2uWFX584LhVqJhnKhtd2lveadkwjX9TTRDJkJJOW88Yf2hDSyvWRAKS90D 65SEB2SIrgYiOTqCW4TQXPv5cNSn+LPimrkPus4likNyxJajbck5lB5GVLTTd0dp X0WPp4uhNsISHERZzdJpT8Y3uu5VrPzgSxPay/aPh+n7vy/wFknliZ4IfBSZtOri J5OrlN+Dal0M7eli1ojoByMLsH5Tzzd6/pfmOtWH/wNUFuMPdNwM/KuzcZRn+aMY FZ6jk6Ge0UNgFoQQPb6ddu0YBlPQGK5t+jPS47qR8fEqV7VxBDFVQYKK5Lni9iwi bIarRFTWQNj3nYZ44VOsk95QuyKe2Gw5NkjzlsEhQdQ318urQ6tpAAvjet/xbaHv 6SO/0r3APr5jxH2GGrLUvRRezbXYkBhEVhWOtcOQryXEzPAbcGc= =Cd8P -----END PGP SIGNATURE----- . ========================================================================= Ubuntu Security Notice USN-3742-2 August 14, 2018 linux-lts-trusty vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 12.04 ESM Summary: Several security issues were fixed in the Linux kernel. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) 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. A local attacker in a guest virtual machine could use this to expose sensitive information (memory from other guests or the host OS). (CVE-2018-3646) 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. (CVE-2018-3620) Andrey Konovalov discovered an out-of-bounds read in the POSIX timers subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. A remote attacker could use this to cause a denial of service. (CVE-2018-5390) Juha-Matti Tilli discovered that the IP implementation in the Linux kernel performed algorithmically expensive operations in some situations when handling incoming packet fragments. A remote attacker could use this to cause a denial of service. (CVE-2018-5391) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM: linux-image-3.13.0-155-generic 3.13.0-155.206~precise1 linux-image-3.13.0-155-generic-lpae 3.13.0-155.206~precise1 linux-image-generic-lpae-lts-trusty 3.13.0.155.145 linux-image-generic-lts-trusty 3.13.0.155.145 Please note that the recommended mitigation for CVE-2018-3646 involves updating processor microcode in addition to updating the kernel; however, the kernel includes a fallback for processors that have not received microcode updates. 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. 5 ELS) - i386, noarch, s390x, x86_64 3. 6.5) - x86_64 3. (CVE-2018-3620, CVE-2018-3646) * kernel: kvm: vmx: host GDT limit corruption (CVE-2018-10901) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section

AFFECTED PRODUCTS