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Ubuntu Security Update USN-3289-1: QEMU vulnerabilities

Discussion in 'Linux Security Announcements (Automated)' started by LinuxBot, May 16, 2017.

  1. LinuxBot

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    Ubuntu Security Notice USN-3289-1


    16th May, 2017

    qemu vulnerabilities


    A security issue affects these releases of Ubuntu and its derivatives:

    • Ubuntu 17.04
    • Ubuntu 16.10
    • Ubuntu 16.04 LTS
    • Ubuntu 14.04 LTS
    Summary


    Several security issues were fixed in QEMU.

    Software description

    • qemu - Machine emulator and virtualizer
    Details


    Li Qiang discovered that QEMU incorrectly handled VirtFS directory sharing.
    A privileged attacker inside the guest could use this issue to cause QEMU
    to crash, resulting in a denial of service. (CVE-2017-7377, CVE-2017-8086)

    Jiangxin discovered that QEMU incorrectly handled the Cirrus VGA device. A
    privileged attacker inside the guest could use this issue to cause QEMU to
    crash, resulting in a denial of service. (CVE-2017-7718)

    Li Qiang and Jiangxin discovered that QEMU incorrectly handled the Cirrus
    VGA device when being used with a VNC connection. A privileged attacker
    inside the guest could use this issue to cause QEMU to crash, resulting in
    a denial of service, or possibly execute arbitrary code on the host. In the
    default installation, when QEMU is used with libvirt, attackers would be
    isolated by the libvirt AppArmor profile. (CVE-2017-7980)

    Jiang Xin discovered that QEMU incorrectly handled the audio subsystem. A
    privileged attacker inside the guest could use this issue to cause QEMU to
    crash, resulting in a denial of service. (CVE-2017-8309)

    Jiang Xin discovered that QEMU incorrectly handled the input subsystem. A
    privileged attacker inside the guest could use this issue to cause QEMU to
    crash, resulting in a denial of service. This issue only affected Ubuntu
    16.04 LTS, Ubuntu 16.10 and Ubuntu 17.04. (CVE-2017-8379)

    Update instructions


    The problem can be corrected by updating your system to the following package version:

    Ubuntu 17.04:
    qemu-system-misc 1:2.8+dfsg-3ubuntu2.2
    qemu-system-s390x 1:2.8+dfsg-3ubuntu2.2
    qemu-system 1:2.8+dfsg-3ubuntu2.2
    qemu-system-aarch64 1:2.8+dfsg-3ubuntu2.2
    qemu-system-x86 1:2.8+dfsg-3ubuntu2.2
    qemu-system-sparc 1:2.8+dfsg-3ubuntu2.2
    qemu-system-arm 1:2.8+dfsg-3ubuntu2.2
    qemu-system-ppc 1:2.8+dfsg-3ubuntu2.2
    qemu-system-mips 1:2.8+dfsg-3ubuntu2.2
    Ubuntu 16.10:
    qemu-system-misc 1:2.6.1+dfsg-0ubuntu5.5
    qemu-system-s390x 1:2.6.1+dfsg-0ubuntu5.5
    qemu-system 1:2.6.1+dfsg-0ubuntu5.5
    qemu-system-aarch64 1:2.6.1+dfsg-0ubuntu5.5
    qemu-system-x86 1:2.6.1+dfsg-0ubuntu5.5
    qemu-system-sparc 1:2.6.1+dfsg-0ubuntu5.5
    qemu-system-arm 1:2.6.1+dfsg-0ubuntu5.5
    qemu-system-ppc 1:2.6.1+dfsg-0ubuntu5.5
    qemu-system-mips 1:2.6.1+dfsg-0ubuntu5.5
    Ubuntu 16.04 LTS:
    qemu-system-misc 1:2.5+dfsg-5ubuntu10.14
    qemu-system-s390x 1:2.5+dfsg-5ubuntu10.14
    qemu-system 1:2.5+dfsg-5ubuntu10.14
    qemu-system-aarch64 1:2.5+dfsg-5ubuntu10.14
    qemu-system-x86 1:2.5+dfsg-5ubuntu10.14
    qemu-system-sparc 1:2.5+dfsg-5ubuntu10.14
    qemu-system-arm 1:2.5+dfsg-5ubuntu10.14
    qemu-system-ppc 1:2.5+dfsg-5ubuntu10.14
    qemu-system-mips 1:2.5+dfsg-5ubuntu10.14
    Ubuntu 14.04 LTS:
    qemu-system-misc 2.0.0+dfsg-2ubuntu1.34
    qemu-system 2.0.0+dfsg-2ubuntu1.34
    qemu-system-aarch64 2.0.0+dfsg-2ubuntu1.34
    qemu-system-x86 2.0.0+dfsg-2ubuntu1.34
    qemu-system-sparc 2.0.0+dfsg-2ubuntu1.34
    qemu-system-arm 2.0.0+dfsg-2ubuntu1.34
    qemu-system-ppc 2.0.0+dfsg-2ubuntu1.34
    qemu-system-mips 2.0.0+dfsg-2ubuntu1.34

    To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

    After a standard system update you need to restart all QEMU virtual
    machines to make all the necessary changes.



    References


    CVE-2017-7377, CVE-2017-7718, CVE-2017-7980, CVE-2017-8086, CVE-2017-8309, CVE-2017-8379

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