-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm security update Advisory ID: RHSA-2018:1658-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:1658 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 6.6 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 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. 6.6) - x86_64 Red Hat Enterprise Linux Server TUS (v. 6.6) - 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. 6.6): Source: qemu-kvm-0.12.1.2-2.448.el6_6.6.src.rpm x86_64: qemu-guest-agent-0.12.1.2-2.448.el6_6.6.x86_64.rpm qemu-img-0.12.1.2-2.448.el6_6.6.x86_64.rpm qemu-kvm-0.12.1.2-2.448.el6_6.6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.448.el6_6.6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.448.el6_6.6.x86_64.rpm Red Hat Enterprise Linux Server TUS (v. 6.6): Source: qemu-kvm-0.12.1.2-2.448.el6_6.6.src.rpm x86_64: qemu-guest-agent-0.12.1.2-2.448.el6_6.6.x86_64.rpm qemu-img-0.12.1.2-2.448.el6_6.6.x86_64.rpm qemu-kvm-0.12.1.2-2.448.el6_6.6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.448.el6_6.6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.448.el6_6.6.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 iQIVAwUBWwQwS9zjgjWX9erEAQgB6RAAoAoZvcJTo5OQMCqptpRU4a+ZPmlB3C9C 2Z3vFhGS+sgF1FUkqMfy8JcFpVaDjFKK+TUAVFKTEz0Hhawd+0xYRuUKNku7DXHI r5PK/2ex3AoJezXxkyuGwODKYjX0siG3nuIdGw+qD3VnIF1jaAVNpK+fnqzTVKrs AdOMGv18xJw4joxDNZNUCi3jDfgAVLwAdLGyWzhYnmIT14BfOnuSo3YDmxoeV45X Kmnj7rF4DQQPzPIejHf5stJu55iJM0cOWO51bmBakybIizFKdDKiCiGuVTsHkFXg gHHxA7VwdrrSC2MofyBEP0jsd9LhFskZdi4+ZdmQT7tPbf59k6Nms+RoBgUGaNJv zLAX9b2OusjR3deoe1KIdNF7KYG6B9YWuV7vnykT4Wofg/GUesFYr3SZpXxVtud8 fbCUh2OiYXROtXXIHj+D7E3TbR5HSMtbrVrPF4vyE3GQ5VyNBL82lFYl0vhh+IzW HefX9XJEVYXT4dBZUEA1ombB2zn8lvYyXiQHThOF1BswlZmELEX72gxbrPWsGUr5 VXuufoLcUd9VLcrsloHDS6IqyWodKYczZSQL5rEnGxGL5osjSWcXq9WvS2MUzTTM wVgjskHPLaozCO7/GitjRGNwKGiFAWbkb9IxeQV+e8hrAq2JD0X2RvW8fZtPd5o2 9eWpfBsNk3w= =1FPw -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce