安全公告详情

NS-SA-2019-0007

2019-07-17 14:54:21

简介

important: kernel security update

严重级别

important

主题

An update for kernel is now available for NewStart CGSL MAIN 5.04.
NewStart Security has rated this update as having a security impact of important. A Common Vunlnerability Scoring System(CVSS)base score, which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section.

详细描述

kernel: The python-perf package contains a module that permits applications written in the Python programming language to use the interface to manipulate perf events.


Security Fix(es):
kernel: It was found that the timer functionality in the Linux kernel ALSA subsystem is prone to a race condition between read and ioctl system call handlers, resulting in an uninitialized memory disclosure to user space. A local user could use this flaw to read information belonging to other users.(CVE-2017-1000380)
kernel: An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited. Variant CVE-2017-5715 triggers the speculative execution by utilizing branch target injection. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to cross the syscall and guest/host boundaries and read privileged memory by conducting targeted cache side-channel attacks.(CVE-2017-5715)
kernel: An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited. Variant CVE-2017-5753 triggers the speculative execution by performing a bounds-check bypass. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to cross the syscall boundary and read privileged memory by conducting targeted cache side-channel attacks.(CVE-2017-5753)
kernel: An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited. Variant CVE-2017-5754 relies on the fact that, on impacted microprocessors, during speculative execution of instruction permission faults, exception generation triggered by a faulting access is suppressed until the retirement of the whole instruction block. In a combination with the fact that memory accesses may populate the cache even when the block is being dropped and never committed (executed), an unprivileged local attacker could use this flaw to read privileged (kernel space) memory by conducting targeted cache side-channel attacks. Note: CVE-2017-5754 affects Intel x86-64 microprocessors. AMD x86-64 microprocessors are not affected by this issue.(CVE-2017-5754)
kernel: bugfix


Solution:
For details on how to apply this update, which includes the changes described in this advisory, refer to:
http://security.gd-linux.com/how_to_apply_patch.html
Remember the build tag is 5.04.F2.

影响组件

  • kernel

影响产品

  • CGSL MAIN 5.04

更新包

{"fix":[{"product":"CGSL MAIN 5.04","pkgs":[{"binary":["kernel-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","kernel-abi-whitelists-3.10.0-693.11.6.el7.cgsl2166.noarch.rpm","kernel-debug-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","kernel-debug-debuginfo-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","kernel-debug-devel-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","kernel-debuginfo-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","kernel-debuginfo-common-x86_64-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","kernel-devel-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","kernel-doc-3.10.0-693.11.6.el7.cgsl2166.noarch.rpm","kernel-headers-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","kernel-tools-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","kernel-tools-debuginfo-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","kernel-tools-libs-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","kernel-tools-libs-devel-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","perf-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","perf-debuginfo-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","python-perf-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm","python-perf-debuginfo-3.10.0-693.11.6.el7.cgsl2166.x86_64.rpm"],"source":"kernel-3.10.0-693.11.6.el7.cgsl2166.src.rpm"}]}]}

CVE

参考