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Red Hat 7: RHSA-2018-1649-01 Important: OpenJDK Cache Attack Mitigation

red hat
Calendar Grey May 22, 2018
Dist Redhat Esm H88
Crucial patch deployed for java-1.8.0-openjdk on Red Hat 7 focusing on a major vulnerability related to caching attacks.
An update for java-1.8.0-openjdk is now available for Red Hat Enterprise Linux 7

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

All running instances of OpenJDK Java must be restarted for this update to take effect.

Summary

The java-1.8.0-openjdk packages provide the OpenJDK 8 Java Runtime Environment and the OpenJDK 8 Java Software Development Kit.
Security Fix(es):
* An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update 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 read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639)
Note: This is the OpenJDK side of the CVE-2018-3639 mitigation.
Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting this issue.

Topics%20covered

Topics Covered

security advisory red hat security fix important update java security openjdk cache attack

References

https://access.redhat.com/security/cve/CVE-2018-3639 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/ssbd

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.src.rpm
x86_64: java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.i686.rpm java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64.rpm java-1.8.0-openjdk-debuginfo-1.8.0.171-8.b10.el7_5.i686.rpm java-1.8.0-openjdk-debuginfo-1.8.0.171-8.b10.el7_5.x86_64.rpm java-1.8.0-openjdk-headless-1.8.0.171-8.b10.el7_5.i686.rpm java-1.8.0-openjdk-headless-1.8.0.171-8.b10.el7_5.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch: java-1.8.0-openjdk-javadoc-1.8.0.171-8.b10.el7_5.noarch.rpm java-1.8.0-openjdk-javadoc-debug-1.8.0.171-8.b10.el7_5.noarch.rpm java-1.8.0-openjdk-javadoc-zip-1.8.0.171-8.b10.el7_5.noarch.rpm java-1.8.0-openjdk-javadoc-zip-debug-1.8.0.171-8.b10.el7_5.noarch.rpm
x86_64: java-1.8.0-openjdk-accessibility-1.8.0.171-8.b10.el7_5.i686.rpm java-1.8.0-openjdk-accessibility-1.8.0.171-8.b10.el7_5.x86_64.rpm java-1.8.0-openjdk-accessibility-debug-1.8.0.171-8.b10.el7_5.i686.rpm java-1.8.0-openjdk-accessibility-debug-1.8.0.171-8.b10.el7_5.x86_64.rpm java-1.8.0-openjdk-debug-1.8.0.171-8.b10.el7_5.i686.rpm java-1.8.0-openjdk-debug-1.8.0.171-8.b10.el7_5.x86_64.rpm java-1.8.0-openjdk-debuginfo-1.8.0.171-8.b10.el7_5.i686.rpm java-1.8.0-openjdk-debuginfo-1.8.0.171-8.b10.el7_5.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:1649-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:1649
Issue date: 2018-05-21

Topic

An update for java-1.8.0-openjdk is now available for Red Hat EnterpriseLinux 7.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 security fix important update java security openjdk cache attack

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch, ppc64le, s390x

Bugs Fixed

1566890 - CVE-2018-3639 hw: cpu: speculative store bypass

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