The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2630-1 advisory.

    Matt Tait discovered that QEMU incorrectly handled the virtual PCNET 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-2015-3209)

    Kurt Seifried discovered that QEMU incorrectly handled certain temporary files. A local attacker could use     this issue to cause a denial of service. (CVE-2015-4037)

    Jan Beulich discovered that the QEMU Xen code incorrectly restricted write access to the host MSI message     data field. A malicious guest could use this issue to cause a denial of service. This issue only applied     to Ubuntu 14.04 LTS, Ubuntu 14.10 and Ubuntu 15.04. (CVE-2015-4103)

    Jan Beulich discovered that the QEMU Xen code incorrectly restricted access to the PCI MSI mask bits. A     malicious guest could use this issue to cause a denial of service. This issue only applied to Ubuntu 14.04     LTS, Ubuntu 14.10 and Ubuntu 15.04. (CVE-2015-4104)

    Jan Beulich discovered that the QEMU Xen code incorrectly handled MSI-X error messages. A malicious guest     could use this issue to cause a denial of service. This issue only applied to Ubuntu 14.04 LTS, Ubuntu     14.10 and Ubuntu 15.04. (CVE-2015-4105)

    Jan Beulich discovered that the QEMU Xen code incorrectly restricted write access to the PCI config space.
    A malicious guest could use this issue to cause a denial of service, obtain sensitive information, or     possibly execute arbitrary code. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 14.10 and Ubuntu     15.04. (CVE-2015-4106)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

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Ubuntu 14.04 LTS : QEMU vulnerabilities (USN-2630-1)

critical Nessus Plugin ID 84118

Version 2.12