Ubuntu 4191-1: QEMU vulnerabilities

    Date13 Nov 2019
    CategoryUbuntu
    120
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in QEMU.
    ==========================================================================
    Ubuntu Security Notice USN-4191-1
    November 14, 2019
    
    qemu vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.10
    - Ubuntu 19.04
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Several security issues were fixed in QEMU.
    
    Software Description:
    - qemu: Machine emulator and virtualizer
    
    Details:
    
    It was discovered that the LSI SCSI adapter emulator implementation in QEMU
    did not properly validate executed scripts. A local attacker could use this
    to cause a denial of service. (CVE-2019-12068)
    
    Sergej Schumilo, Cornelius Aschermann and Simon Wörner discovered that the
    qxl paravirtual graphics driver implementation in QEMU contained a null
    pointer dereference. A local attacker in a guest could use this to cause a
    denial of service. (CVE-2019-12155)
    
    Riccardo Schirone discovered that the QEMU bridge helper did not properly
    validate network interface names. A local attacker could possibly use this
    to bypass ACL restrictions. (CVE-2019-13164)
    
    It was discovered that a heap-based buffer overflow existed in the SLiRP
    networking implementation of QEMU. A local attacker in a guest could use
    this to cause a denial of service or possibly execute arbitrary code in the
    host. (CVE-2019-14378)
    
    It was discovered that a use-after-free vulnerability existed in the SLiRP
    networking implementation of QEMU. A local attacker in a guest could use
    this to cause a denial of service. (CVE-2019-15890)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.10:
      qemu                            1:4.0+dfsg-0ubuntu9.1
      qemu-kvm                        1:4.0+dfsg-0ubuntu9.1
      qemu-system-common              1:4.0+dfsg-0ubuntu9.1
      qemu-system-gui                 1:4.0+dfsg-0ubuntu9.1
      qemu-system-x86                 1:4.0+dfsg-0ubuntu9.1
      qemu-user-static                1:4.0+dfsg-0ubuntu9.1
      qemu-utils                      1:4.0+dfsg-0ubuntu9.1
    
    Ubuntu 19.04:
      qemu                            1:3.1+dfsg-2ubuntu3.6
      qemu-kvm                        1:3.1+dfsg-2ubuntu3.6
      qemu-system-common              1:3.1+dfsg-2ubuntu3.6
      qemu-system-gui                 1:3.1+dfsg-2ubuntu3.6
      qemu-system-x86                 1:3.1+dfsg-2ubuntu3.6
      qemu-user-static                1:3.1+dfsg-2ubuntu3.6
      qemu-utils                      1:3.1+dfsg-2ubuntu3.6
    
    Ubuntu 18.04 LTS:
      qemu                            1:2.11+dfsg-1ubuntu7.20
      qemu-kvm                        1:2.11+dfsg-1ubuntu7.20
      qemu-system-common              1:2.11+dfsg-1ubuntu7.20
      qemu-system-x86                 1:2.11+dfsg-1ubuntu7.20
      qemu-user-static                1:2.11+dfsg-1ubuntu7.20
      qemu-utils                      1:2.11+dfsg-1ubuntu7.20
    
    Ubuntu 16.04 LTS:
      qemu                            1:2.5+dfsg-5ubuntu10.42
      qemu-kvm                        1:2.5+dfsg-5ubuntu10.42
      qemu-system-common              1:2.5+dfsg-5ubuntu10.42
      qemu-system-x86                 1:2.5+dfsg-5ubuntu10.42
      qemu-user-static                1:2.5+dfsg-5ubuntu10.42
      qemu-utils                      1:2.5+dfsg-5ubuntu10.42
    
    After a standard system update you need to restart all QEMU virtual
    machines to make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4191-1
      CVE-2019-12068, CVE-2019-12155, CVE-2019-13164, CVE-2019-14378,
      CVE-2019-15890
    
    Package Information:
      https://launchpad.net/ubuntu/+source/qemu/1:4.0+dfsg-0ubuntu9.1
      https://launchpad.net/ubuntu/+source/qemu/1:3.1+dfsg-2ubuntu3.6
      https://launchpad.net/ubuntu/+source/qemu/1:2.11+dfsg-1ubuntu7.20
      https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-5ubuntu10.42
    
    
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