-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: redhat-virtualization-host security update Advisory ID: RHSA-2018:2403-01 Product: Red Hat Virtualization Advisory URL: https://access.redhat.com/errata/RHSA-2018:2403 Issue date: 2018-08-15 CVE Names: CVE-2018-3620 CVE-2018-3646 CVE-2018-5390 ==================================================================== 1. Summary: An update for redhat-release-virtualization-host and redhat-virtualization-host is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 7. 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: RHEL 7-based RHEV-H for RHEV 4 (build requirements) - noarch, x86_64 Red Hat Virtualization 4 Hypervisor for RHEL 7 - noarch 3. Description: The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. Security Fix(es): * Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646) * A flaw named SegmentSmack was found in the way the Linux kernel handled specially crafted TCP packets. A remote attacker could use this flaw to trigger time and calculation expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() functions by sending specially modified packets within ongoing TCP sessions which could lead to a CPU saturation and hence a denial of service on the system. Maintaining the denial of service condition requires continuous two-way TCP sessions to a reachable open port, thus the attacks cannot be performed using spoofed IP addresses. (CVE-2018-5390) Red Hat would like to thank Intel OSSIRT (Intel.com) for reporting CVE-2018-3620 and CVE-2018-3646 and Juha-Matti Tilli (Aalto University, Department of Communications and Networking and Nokia Bell Labs) for reporting CVE-2018-5390. 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/2974891 5. Bugs fixed (https://bugzilla.redhat.com/): 1585005 - CVE-2018-3646 CVE-2018-3620 Kernel: hw: cpu: L1 terminal fault (L1TF) 1601704 - CVE-2018-5390 kernel: TCP segments with random offsets allow a remote denial of service (SegmentSmack) 1614067 - [Tracker] Tracker for RHV-H for 4.2.5-2 6. Package List: Red Hat Virtualization 4 Hypervisor for RHEL 7: Source: redhat-virtualization-host-4.2-20180813.0.el7_5.src.rpm noarch: redhat-virtualization-host-image-update-4.2-20180813.0.el7_5.noarch.rpm RHEL 7-based RHEV-H for RHEV 4 (build requirements): Source: redhat-release-virtualization-host-4.2-5.2.el7.src.rpm noarch: redhat-virtualization-host-image-update-placeholder-4.2-5.2.el7.noarch.rpm x86_64: redhat-release-virtualization-host-4.2-5.2.el7.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-2018-3620 https://access.redhat.com/security/cve/CVE-2018-3646 https://access.redhat.com/security/cve/CVE-2018-5390 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/L1TF 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 iQIVAwUBW3P+ktzjgjWX9erEAQjR5w/+Owt0elFj8Jasr3j7Vy/NnNKDhlwM5mv1 m2WoBrngWAxlaj1weCTDKp+MiLNBtgF2uoWmcdnM23c+MOnNTCt1xqk6hrcEVbL6 PaV2iJ93IZKDUeew1NNmR79RV1XuMxkQxnLbgYQwR3MUH99ABC83/Ms0UK02KAsl e8nF7hHOFISN+nfaSVSRcbzx/eASXIYq/K0mS9G7yIi35/Vc2Ur99M0igsq4/uag PmqQCsCpo2BkXib10CqFRMdc1TYnweB/7oDn/EfwdCMaS6ye/hZfBQm5I8aa4lWe xiYa//JkE70MsrHyOO76LSF4SPkPpAXtr2dzW55sjJuvU9jSgsXpKaIu3soI0TvZ DbL052d/u5lgwECMTI424AyNZl7OpmGt0ymUUD66UTj5dplRW9+DVor9GZ3oIo3w LeA+DE4v6D/5b7f8XML8CVQy0qjex9n230X5UQWhNMnII8rLXn99rzJT6FmRxj4u VbDjbMQ7eKx7PRI8TWCjTdmfzL1oJbkJSWBV13OaDx50Gd8UPKS/sA4F7ILrAItD iOEJnhtD43PXnoIIp811/naVkERDLP4n7oPUZVXZcvrPoza9mdSqk3g5t4Nbqbz1 UNzOAJVLmOfo0EDrgNfnTLMOtJmNf05GEMZop3MDe+FGQ9/mWe33smNjUHWBE0pG TiZlgHWQEVI=Wsyu -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce