-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Low: qemu-kvm security and bug fix update Advisory ID: RHSA-2017:0083-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0083.html Issue date: 2017-01-17 CVE Names: CVE-2016-2857 ===================================================================== 1. Summary: An update for qemu-kvm is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Low. 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 Client (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 3. Description: Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm packages provide the user-space component for running virtual machines using KVM. Security Fix(es): * An out-of-bounds read-access flaw was found in the QEMU emulator built with IP checksum routines. The flaw could occur when computing a TCP/UDP packet's checksum, because a QEMU function used the packet's payload length without checking against the data buffer's size. A user inside a guest could use this flaw to crash the QEMU process (denial of service). (CVE-2016-2857) Red Hat would like to thank Ling Liu (Qihoo 360 Inc.) for reporting this issue. Bug Fix(es): * Previously, rebooting a guest virtual machine more than 128 times in a short period of time caused the guest to shut down instead of rebooting, because the virtqueue was not cleaned properly. This update ensures that the virtqueue is cleaned more reliably, which prevents the described problem from occurring. (BZ#1393484) 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/): 1296567 - CVE-2016-2857 Qemu: net: out of bounds read in net_checksum_calculate() 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: qemu-kvm-1.5.3-126.el7_3.3.src.rpm x86_64: qemu-img-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.3.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): Source: qemu-kvm-1.5.3-126.el7_3.3.src.rpm x86_64: qemu-img-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.3.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: qemu-kvm-1.5.3-126.el7_3.3.src.rpm ppc64: qemu-img-1.5.3-126.el7_3.3.ppc64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.3.ppc64.rpm ppc64le: qemu-img-1.5.3-126.el7_3.3.ppc64le.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.3.ppc64le.rpm x86_64: qemu-img-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.3.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: qemu-kvm-1.5.3-126.el7_3.3.src.rpm x86_64: qemu-img-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.3.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.3.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-2016-2857 https://access.redhat.com/security/updates/classification/#low https://access.redhat.com/security/updates/classification/#Low 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFYfm4IXlSAg2UNWIIRAqo2AKDBcem0HhMfiKIYWKl1mnXrIt1PhACfbk51 gD9g89JnjAZCvGffEdEMDsQ= =FCGV -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce