Ubuntu 4191-2: QEMU vulnerabilities

    Date13 Nov 2019
    CategoryUbuntu
    125
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in QEMU.
    ==========================================================================
    Ubuntu Security Notice USN-4191-2
    November 14, 2019
    
    qemu vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 ESM
    
    Summary:
    
    Several security issues were fixed in QEMU.
    
    Software Description:
    - qemu: Machine emulator and virtualizer
    
    Details:
    
    USN-4191-2 fixed a vulnerability in QEMU. This update provides the
    corresponding update for Ubuntu 14.04 ESM.
    
    Original advisory 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 14.04 ESM:
      qemu                            2.0.0+dfsg-2ubuntu1.47
      qemu-common                     2.0.0+dfsg-2ubuntu1.47
      qemu-kvm                        2.0.0+dfsg-2ubuntu1.47
      qemu-system-common              2.0.0+dfsg-2ubuntu1.47
      qemu-system-x86                 2.0.0+dfsg-2ubuntu1.47
      qemu-user-static                2.0.0+dfsg-2ubuntu1.47
      qemu-utils                      2.0.0+dfsg-2ubuntu1.47
    
    After a standard system update you need to restart all QEMU virtual
    machines to make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4191-2
      https://usn.ubuntu.com/4191-1
      CVE-2019-12068, CVE-2019-12155, CVE-2019-13164, CVE-2019-14378,
      CVE-2019-15890
    
    
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