-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm security update Advisory ID: RHSA-2018:3397-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:3397 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 6.5 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 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 Server AUS (v. 6.5): Source: qemu-kvm-0.12.1.2-2.415.el6_5.19.src.rpm x86_64: qemu-guest-agent-0.12.1.2-2.415.el6_5.19.x86_64.rpm qemu-img-0.12.1.2-2.415.el6_5.19.x86_64.rpm qemu-kvm-0.12.1.2-2.415.el6_5.19.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.19.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.415.el6_5.19.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 iQIVAwUBW9hUOtzjgjWX9erEAQjgghAAh8FT6RFhlfd+3CeQSnOkj52o4uZTo0qa rvywaY74HjiZjpY9h6Li7urLMAVvoaoBFATwXVEX2Nvx2j8171TjLBPP/2zPskGX mxIrWh0dLi0k5J4YvXt/FLxcc3xO9wtvKOqw/kMSuIbHRS5d0IFP9UsSS5mVERbj rvwf/dsg2shhfuTeS8XsJrxDiE9iqvPGSQuAE6zar/gfdk5dj/ULP2eDSWP+Mo14 bUTG0b4X28Ex8AOuRilFvXiFL/Mj5gNpQJ3P0xEFhCWeVIWFgSQBgBqjWld/gTm9 sWA/FHNLHsfC1bGdrtfHkVt5d5Ji8n5myQF1JveQ+edodwdKN5QomHjBW4WeZ/+d FOer4vJjhc7Imf9QOgJTBSMQ3c7jAZsLY+7FvED+qFxfk/oErUPgCWyrtAS+4Sgu PWTebjW34x/eLg95BXkKUkccnCy1kKI3tFIL+ATUpSX6/YI3MhL9l8tcMz4wKzYt zFUZhX6vtFcbdKG6H6gD9J9JuoEZ34Yay/k+1rnGRZSZGlzH3jAz+t9d+9JmJ2qL z4bsXFNKcnbYV2VSmJ63QRqJgtyxVaHp+0PsWXe6ul/eAwMzgkLWqCNl/WYB38ac pFuG31pTEmzFqymfiCsw0YGEEoiU+VTW35CIa+Jgl+66qy6I7G9rv/kDXIbfcXOr KVUSl1Fl+7w=2XuX -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce