-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm security update Advisory ID: RHSA-2018:1657-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:1657 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 6.5 Advanced 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 Server AUS (v. 6.5) - 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 Server AUS (v. 6.5): Source: qemu-kvm-0.12.1.2-2.415.el6_5.18.src.rpm x86_64: qemu-guest-agent-0.12.1.2-2.415.el6_5.18.x86_64.rpm qemu-img-0.12.1.2-2.415.el6_5.18.x86_64.rpm qemu-kvm-0.12.1.2-2.415.el6_5.18.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.18.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.415.el6_5.18.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 iQIVAwUBWwQptNzjgjWX9erEAQg7Fg//d90hzc3/kpDZi3LfAg9EkN5aImN4Yizb al6n73dSfw4qShRsaE8lculzn7YNZAffzM1JN5XRlDiFTjUv3k+QYfY3YJDHsNTO 6WfVBnTR25aJXGrMF4MgBnwcputmIe60kYuyaLZzVoubMeBlkWBDuf5l+Ct641zR 7upVb3LitSUBqvmesRbswpFEVqecsnCpAOC9ah7cvHYIqeXu/6/jT/lTAY/xtcLD qkkuB6My7JT1nSGKgeN/11xQawh/BmskOZXktbpN+7yvGV96IpUOJ85sqJYV6Ux+ LB734yHnfsDxdc1gu92UQCy+FOefLbOpbVRriiZvJlhQHuPf1mOTWVN7Wer0cYFs lXgwrw5jHFLc2UZQzqYVzguAcJYjAXZhiQoI9Rx2J/K1+lQsCGqqraJrJIlRPPxk cYjibTjhptpj7syt426+WPIFMI6RyFaHDg3u34VMFVmwm6hLRTk9a2aHPgSOT7ZB niOSM1xGhkXKdWaboOxt0EtaUa1K4Upv01WU3n9B9pbiB7RkFS9C1IKhyFnpH7jg aEqXfwvSpmsnEM+f2drDjHj39M2ue+nAbjlz06CD7sPIquyWRpmJq3uGSs7nEE4l 6H+oTkBhC5UrucTEy9CJWAiEIsBWFVwAczOegjhaeu5iJ+mkyB3FSE4Q79iGdkMf 5dx/R0XzmDM= =pzi7 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce