-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm security update Advisory ID: RHSA-2018:1660-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:1660 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. 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 Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, 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 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 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 Desktop (v. 6): Source: qemu-kvm-0.12.1.2-2.503.el6_9.6.src.rpm i386: qemu-guest-agent-0.12.1.2-2.503.el6_9.6.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.6.i686.rpm x86_64: qemu-guest-agent-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-img-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-kvm-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.503.el6_9.6.x86_64.rpm Red Hat Enterprise Linux HPC Node (v. 6): Source: qemu-kvm-0.12.1.2-2.503.el6_9.6.src.rpm x86_64: qemu-guest-agent-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-img-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-kvm-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.503.el6_9.6.x86_64.rpm Red Hat Enterprise Linux Server (v. 6): Source: qemu-kvm-0.12.1.2-2.503.el6_9.6.src.rpm i386: qemu-guest-agent-0.12.1.2-2.503.el6_9.6.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.6.i686.rpm ppc64: qemu-guest-agent-0.12.1.2-2.503.el6_9.6.ppc64.rpm qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.6.ppc64.rpm x86_64: qemu-guest-agent-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-img-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-kvm-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.503.el6_9.6.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: qemu-kvm-0.12.1.2-2.503.el6_9.6.src.rpm i386: qemu-guest-agent-0.12.1.2-2.503.el6_9.6.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.6.i686.rpm x86_64: qemu-guest-agent-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-img-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-kvm-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.503.el6_9.6.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 iQIVAwUBWwNSlNzjgjWX9erEAQjErA//RtyIIc3nO5wa7asPZn0LmqWcT2V5+1zM BUvmxq0GweXvrXTXEKd+ml0bWbak5//XbtZi/tSSf72yOsIWiPx5Z5pZXWt3CP2e +8qOBOMkWs9+pgeD8bGBhqABUTFlmQPV2rvOQS+mLscDT8w/HrmZVTw5DySLxL01 YKruEqNpDBNvd/HLC7psv2pljEO0GFOmI97WBbRyFbILRt30b+m0ZqVcK4IW8Pdf 5HXUahoU+s8eaPwhHl2t8PW1Kb6D2BZncyKERWg+MbY2Z3lHlgSTE4DYaHuIwf/k xSVj+/cieW0I9HcsB9NzkzdSl19NudA2ZkCbG3Xv8yMU6HPxxFz9vs98HcWwBf36 T2Gwf8bUQ2ameGVPdaWvrmN+RxKtqGm7/spyH44K+Isiw5dNwAn1v690FqzDbPFe a+ArBrRu6roIIKs/i5H1EtJaPQyXdUCUmmS+dJn7ylzJYfSU+odYM73/JwQncV5V RvG8dBGm/mIFqrfzu67ylEz+OnMFBScY/AEqxXbwmoRtQE3yMjo9iXPuIDbNdEMC oxGoDoYuVHEx7mLnQZBfRyMBxVO0O1Qo4W66gd9xD4HXCAmHJY5bOpXG+xBnXkNa s/OmiYgTeYf7o1muJiXoCaC2AqLolQ4GiC1VDuL2PbLnP/u30q78EDiRvRC0JAA8 4eSsYpriN0Y= =4FRp -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce