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Alerts This Week
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Red Hat Enterprise Linux 7.2: RHSA-2018:2389-01 Critical L1TF Threat

red hat
Calendar Grey August 14, 2018
Scroller Redhat
Red Hat unveils significant kernel security patch for various Enterprise Linux editions tackling severe vulnerabilities.
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 L...

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.

Summary

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.

Topics%20covered

Topics Covered

security advisory Red Hat kernel update critical important memory issue L1TF

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

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

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.2Advanced Update Support, Red Hat Enterprise Linux 7.2 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.2 Update Services for SAPSolutions.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat kernel update critical important memory issue L1TF

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

Bugs Fixed

1585005 - CVE-2018-3646 Kernel: hw: cpu: L1 terminal fault (L1TF)

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