Ubuntu 2745-1: QEMU vulnerabilities

    Date24 Sep 2015
    79
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in QEMU.
    ==========================================================================
    Ubuntu Security Notice USN-2745-1
    September 24, 2015
    
    qemu, qemu-kvm vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 15.04
    - Ubuntu 14.04 LTS
    - Ubuntu 12.04 LTS
    
    Summary:
    
    Several security issues were fixed in QEMU.
    
    Software Description:
    - qemu: Machine emulator and virtualizer
    - qemu-kvm: Machine emulator and virtualizer
    
    Details:
    
    Lian Yihan discovered that QEMU incorrectly handled certain payload
    messages in the VNC display driver. A malicious guest could use this issue
    to cause the QEMU process to hang, resulting in a denial of service. This
    issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2015-5239)
    
    Qinghao Tang discovered that QEMU incorrectly handled receiving certain
    packets in the NE2000 network driver. A malicious guest could use this
    issue to cause the QEMU process to hang, resulting in a denial of service.
    (CVE-2015-5278)
    
    Qinghao Tang discovered that QEMU incorrectly handled receiving certain
    packets in the NE2000 network driver. A malicious guest could use this
    issue to cause a denial of service, or possibly execute arbitrary code on
    the host as the user running the QEMU process. In the default installation,
    when QEMU is used with libvirt, attackers would be isolated by the libvirt
    AppArmor profile. (CVE-2015-5279)
    
    Qinghao Tang discovered that QEMU incorrectly handled transmit descriptor
    data when sending network packets. A malicious guest could use this issue
    to cause the QEMU process to hang, resulting in a denial of service.
    (CVE-2015-6815)
    
    Qinghao Tang discovered that QEMU incorrectly handled ATAPI command
    permissions. A malicious guest could use this issue to cause the QEMU
    process to crash, resulting in a denial of service. (CVE-2015-6855)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 15.04:
      qemu-system                     1:2.2+dfsg-5expubuntu9.5
      qemu-system-aarch64             1:2.2+dfsg-5expubuntu9.5
      qemu-system-arm                 1:2.2+dfsg-5expubuntu9.5
      qemu-system-mips                1:2.2+dfsg-5expubuntu9.5
      qemu-system-misc                1:2.2+dfsg-5expubuntu9.5
      qemu-system-ppc                 1:2.2+dfsg-5expubuntu9.5
      qemu-system-sparc               1:2.2+dfsg-5expubuntu9.5
      qemu-system-x86                 1:2.2+dfsg-5expubuntu9.5
    
    Ubuntu 14.04 LTS:
      qemu-system                     2.0.0+dfsg-2ubuntu1.19
      qemu-system-aarch64             2.0.0+dfsg-2ubuntu1.19
      qemu-system-arm                 2.0.0+dfsg-2ubuntu1.19
      qemu-system-mips                2.0.0+dfsg-2ubuntu1.19
      qemu-system-misc                2.0.0+dfsg-2ubuntu1.19
      qemu-system-ppc                 2.0.0+dfsg-2ubuntu1.19
      qemu-system-sparc               2.0.0+dfsg-2ubuntu1.19
      qemu-system-x86                 2.0.0+dfsg-2ubuntu1.19
    
    Ubuntu 12.04 LTS:
      qemu-kvm                        1.0+noroms-0ubuntu14.25
    
    After a standard system update you need to restart all QEMU virtual
    machines to make all the necessary changes.
    
    References:
      https://www.ubuntu.com/usn/usn-2745-1
      CVE-2015-5239, CVE-2015-5278, CVE-2015-5279, CVE-2015-6815,
      CVE-2015-6855
    
    Package Information:
      https://launchpad.net/ubuntu/+source/qemu/1:2.2+dfsg-5expubuntu9.5
      https://launchpad.net/ubuntu/+source/qemu/2.0.0+dfsg-2ubuntu1.19
      https://launchpad.net/ubuntu/+source/qemu-kvm/1.0+noroms-0ubuntu14.25
    
    
    

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