-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm security update Advisory ID: RHSA-2018:3424-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:3424 Issue date: 2018-10-30 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 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 virt-ssbd AMD) 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_7.8.src.rpm x86_64: qemu-guest-agent-0.12.1.2-2.479.el6_7.8.x86_64.rpm qemu-img-0.12.1.2-2.479.el6_7.8.x86_64.rpm qemu-kvm-0.12.1.2-2.479.el6_7.8.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.8.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.479.el6_7.8.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 6.7): Source: qemu-kvm-0.12.1.2-2.479.el6_7.8.src.rpm i386: qemu-guest-agent-0.12.1.2-2.479.el6_7.8.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.8.i686.rpm ppc64: qemu-guest-agent-0.12.1.2-2.479.el6_7.8.ppc64.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.8.ppc64.rpm x86_64: qemu-guest-agent-0.12.1.2-2.479.el6_7.8.x86_64.rpm qemu-img-0.12.1.2-2.479.el6_7.8.x86_64.rpm qemu-kvm-0.12.1.2-2.479.el6_7.8.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.8.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.479.el6_7.8.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 iQIVAwUBW9ipFdzjgjWX9erEAQiMRA/9FuTKlxLOynkADPCnOfUmmEto09NDaKiO pCZZLtrL2YbrsqHfE6vhi3ZD1zJZ2IQnQikEdUCBU+8whCVOn6J+oG19a7w2Pulj Qk3qufxDQjyy7eCzRz4XNFXPGXTRZ7lb4s6sYZ9RlONo3d/KXiYWR3ky7BukClqc xVZKXYdzHGdDiKG812CeEePQaBN6XFTz0YJxapWDDLPJirHewy81dxxyB9qHFpdn Tfx1IVxe0VlVIrGNyuZL+ME/ysWNhTXA637Vm5z4R/9UcL0YfnX6gET6u1BjpdU5 8uQgZ1lCwiABJu9jyIvllJLLdbPQ34ylQaSLUa/Hfr0eKJWAvpYhqBDL4PmAedCD YEIgvqyuhQjBmMSX5a4qWGyKpfOuiqGvGdBDyG5A8JXnxpwl7IRGsgOCALowYw8J h4wYDFeRzZt07BCzFXkrv4cpnRC8YvcMp6wwb2id8mTokpvxiICdsbLYdCVucC8F IzDrfmcyI8zOdX9l4IPYaYS++gMmPw7s6RnPdx/ckWJc0fiVj9vopscnZaGBNCjW M0HToT3U+eX+H9JwwMRQNdllqOk57zuErRrPx0Ker4iE045T0RacnfncW5oovZX4 uzXxztHPQPykLiI4V+HzNdP0a0Adys6OtA4NxFupxP584/SjWgiCLeL15boA2zpf c3Kx/T09l6s=5x4G -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce