![\"RedHat](\"http:\/\/www.linuxsecurity.com\/images\/stories\/icons\/redhat-icon.gif\"){kind=icon}
<\/a>\nAn update for libvirt is now available for Red Hat Enterprise Linux 6.6 Advanced Update Support and Red Hat Enterprise Linux 6.6 Telco Extended Update Support. Red Hat Product Security has rated this update as having a security impact —–BEGIN PGP SIGNED MESSAGE—–
\nHash: SHA256<\/p>\n
=====================================================================
\nRed Hat Security Advisory<\/p>\n
Synopsis: Important: libvirt security update
\nAdvisory ID: RHSA-2018:3400-01
\nProduct: Red Hat Enterprise Linux
\nAdvisory URL: https:\/\/access.redhat.com\/errata\/RHSA-2018:3400
\nIssue date: 2018-10-30
\nCVE Names: CVE-2018-3639
\n=====================================================================<\/p>\n
1. Summary:<\/p>\n
An update for libvirt is now available for Red Hat Enterprise Linux 6.6
\nAdvanced Update Support and Red Hat Enterprise Linux 6.6 Telco Extended
\nUpdate Support.<\/p>\n
Red Hat Product Security has rated this update as having a security impact
\nof Important. A Common Vulnerability Scoring System (CVSS) base score,
\nwhich gives a detailed severity rating, is available for each vulnerability
\nfrom the CVE link(s) in the References section.<\/p>\n
2. Relevant releases\/architectures:<\/p>\n
Red Hat Enterprise Linux Server AUS (v. 6.6) – x86_64
\nRed Hat Enterprise Linux Server Optional AUS (v. 6.6) – x86_64
\nRed Hat Enterprise Linux Server Optional TUS (v. 6.6) – x86_64
\nRed Hat Enterprise Linux Server TUS (v. 6.6) – x86_64<\/p>\n
3. Description:<\/p>\n
The libvirt library contains a C API for managing and interacting with the
\nvirtualization capabilities of Linux and other operating systems. In
\naddition, libvirt provides tools for remote management of virtualized
\nsystems.<\/p>\n
Security Fix(es):<\/p>\n
* An industry-wide issue was found in the way many modern microprocessor
\ndesigns have implemented speculative execution of Load & Store instructions
\n(a commonly used performance optimization). It relies on the presence of a
\nprecisely-defined instruction sequence in the privileged code as well as
\nthe fact that memory read from address to which a recent memory write has
\noccurred may see an older value and subsequently cause an update into the
\nmicroprocessor’s data cache even for speculatively executed instructions
\nthat never actually commit (retire). As a result, an unprivileged attacker
\ncould use this flaw to read privileged memory by conducting targeted cache
\nside-channel attacks. (CVE-2018-3639 virt-ssbd AMD)<\/p>\n
Note: This is the libvirt side of the CVE-2018-3639 mitigation.<\/p>\n
Red Hat would like to thank Ken Johnson (Microsoft Security Response
\nCenter) and Jann Horn (Google Project Zero) for reporting this issue.<\/p>\n
4. Solution:<\/p>\n
For details on how to apply this update, which includes the changes
\ndescribed in this advisory, refer to:<\/p>\n
https:\/\/access.redhat.com\/articles\/11258<\/p>\n
After installing the updated packages, libvirtd will be restarted
\nautomatically.<\/p>\n
5. Bugs fixed (https:\/\/bugzilla.redhat.com\/):<\/p>\n
1566890 – CVE-2018-3639 hw: cpu: speculative store bypass<\/p>\n
6. Package List:<\/p>\n
Red Hat Enterprise Linux Server AUS (v. 6.6):<\/p>\n
Source:
\nlibvirt-0.10.2-46.el6_6.9.src.rpm<\/p>\n
x86_64:
\nlibvirt-0.10.2-46.el6_6.9.x86_64.rpm
\nlibvirt-client-0.10.2-46.el6_6.9.i686.rpm
\nlibvirt-client-0.10.2-46.el6_6.9.x86_64.rpm
\nlibvirt-debuginfo-0.10.2-46.el6_6.9.i686.rpm
\nlibvirt-debuginfo-0.10.2-46.el6_6.9.x86_64.rpm
\nlibvirt-devel-0.10.2-46.el6_6.9.i686.rpm
\nlibvirt-devel-0.10.2-46.el6_6.9.x86_64.rpm
\nlibvirt-python-0.10.2-46.el6_6.9.x86_64.rpm<\/p>\n
Red Hat Enterprise Linux Server TUS (v. 6.6):<\/p>\n
Source:
\nlibvirt-0.10.2-46.el6_6.9.src.rpm<\/p>\n
x86_64:
\nlibvirt-0.10.2-46.el6_6.9.x86_64.rpm
\nlibvirt-client-0.10.2-46.el6_6.9.i686.rpm
\nlibvirt-client-0.10.2-46.el6_6.9.x86_64.rpm
\nlibvirt-debuginfo-0.10.2-46.el6_6.9.i686.rpm
\nlibvirt-debuginfo-0.10.2-46.el6_6.9.x86_64.rpm
\nlibvirt-devel-0.10.2-46.el6_6.9.i686.rpm
\nlibvirt-devel-0.10.2-46.el6_6.9.x86_64.rpm
\nlibvirt-python-0.10.2-46.el6_6.9.x86_64.rpm<\/p>\n
Red Hat Enterprise Linux Server Optional AUS (v. 6.6):<\/p>\n
x86_64:
\nlibvirt-debuginfo-0.10.2-46.el6_6.9.x86_64.rpm
\nlibvirt-lock-sanlock-0.10.2-46.el6_6.9.x86_64.rpm<\/p>\n
Red Hat Enterprise Linux Server Optional TUS (v. 6.6):<\/p>\n
x86_64:
\nlibvirt-debuginfo-0.10.2-46.el6_6.9.x86_64.rpm
\nlibvirt-lock-sanlock-0.10.2-46.el6_6.9.x86_64.rpm<\/p>\n
These packages are GPG signed by Red Hat for security. Our key and
\ndetails on how to verify the signature are available from
\nhttps:\/\/access.redhat.com\/security\/team\/key\/<\/p>\n
7. References:<\/p>\n
https:\/\/access.redhat.com\/security\/cve\/CVE-2018-3639
\nhttps:\/\/access.redhat.com\/security\/updates\/classification\/#important
\nhttps:\/\/access.redhat.com\/security\/vulnerabilities\/ssbd<\/p>\n
8. Contact:<\/p>\n
The Red Hat security contact is . More contact
\ndetails at https:\/\/access.redhat.com\/security\/team\/contact\/<\/p>\n
Copyright 2018 Red Hat, Inc.
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