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Red Hat 6.7 Important: RHSA-2018:1659 Cache Side-Channel Threat

An update for qemu-kvm is now available for Red Hat Enterprise Linux 6.7 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score,. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm security update Advisory ID: RHSA-2018:1659-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:1659 Issue date: 2018-05-21 CVE Names: CVE-2018-3639 ==================================================================== 1. Summary: An update for qemu-kvm is now available for Red Hat Enterprise Linux 6.7 Extended Update Support. 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 HPC Node EUS (v. 6.7) - x86_64 Red Hat Enterprise Linux Server EUS (v. 6.7) - i386, ppc64, x86_64 3. Description: Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM. 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 executedinstructions 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 qemu-kvm 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. 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 After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1566890 - CVE-2018-3639 hw: cpu: speculative store bypass 6. Package List: Red Hat Enterprise Linux HPC Node EUS (v. 6.7): Source: qemu-kvm-0.12.1.2-2.479.el6_7.7.src.rpm x86_64: qemu-guest-agent-0.12.1.2-2.479.el6_7.7.x86_64.rpm qemu-img-0.12.1.2-2.479.el6_7.7.x86_64.rpm qemu-kvm-0.12.1.2-2.479.el6_7.7.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.7.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.479.el6_7.7.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 6.7): Source: qemu-kvm-0.12.1.2-2.479.el6_7.7.src.rpm i386: qemu-guest-agent-0.12.1.2-2.479.el6_7.7.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.7.i686.rpm ppc64: qemu-guest-agent-0.12.1.2-2.479.el6_7.7.ppc64.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.7.ppc64.rpm x86_64: qemu-guest-agent-0.12.1.2-2.479.el6_7.7.x86_64.rpm qemu-img-0.12.1.2-2.479.el6_7.7.x86_64.rpm qemu-kvm-0.12.1.2-2.479.el6_7.7.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.7.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.479.el6_7.7.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-2018-3639 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/ssbd 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2018 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBWwQwntzjgjWX9erEAQgqIg//S3l80PbK4YoZsYy3KOepOQvOVuwxVpI3 AYA9hZ7e28id38cA5tI36m+rx+lkQdVD5AyoIY/stqhRdFiLvydOeHTztiiDr1ab pCo7nRhFCP9LmvDJil65K74GkxBREGB1rXt7/TWmZrXuM0fPX4MgAYEFEkoE0wbW ak3RNwk39oLtEjESd1/xzChQ2t7JYGRtftzp2HowJ/ohpU9pCVzBzWC72TgIQnHO pPjUMFiuvFlzduIc6ZMhmT7oivNwGmXc/4jswwAAPDoqxodjzJ6nQCC1snEOHNCO ffg96lMOVXGchcnZVWLl7lLx5npL3lzVEDMvWePafqZ1zGuiOSXk52Ml2BDz9Xbn BoPHs+kA5pH/ggy2w9alq1FKOyTU8hGho8cXq087d+UsUdquQLKgq9pmkBHxY0Dk f/58DHOt3oCB1FZ3CMJuat9y21JNWiA1DpSMlExhexYOF2X8ARz/r39ikD+y383y hX3A15uY9vkvYGV5PHJYyHrrz7czsWgdqi55liUSojrjJ+TBTkb8f2dne3MkOA8l 83nrWYMZQp2qJBxH0uMfBRjcyzdxCnNSd79E8yCAzmain4vD/D62JbobY9/0cxzi YGLhJcTdU9NIfphNMaWNdfqq61We7zHQn9KN4UExTO3ikTkguhX7BLYqfUqeSk76 27jVYeNH7v8=jS9o -----END PGP SIGNATURE----- -- RHSA-announce mailing list This email address is being protected from spambots. You need JavaScript enabled to view it. . Red Hat's latest update for QEMU-KVM tackles critical vulnerabilities related to cache side-channel attacks, highlighting the need for prompt action by administrators. qemu-kvm Update, Red Hat Advisory, Security Issue, Package Solution, Kernel Protection. . Severity: Important. LinuxSecurity.com Team

May 22, 2018 •Important Red Hat