Use-after-free vulnerability in hw/pci/pcie.c in QEMU (aka Quick Emulator) allows local guest OS users to cause a denial of service (QEMU instance crash) via hotplug and hotunplug operations of Virtio block devices.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Use-after-free vulnerability in hw/pci/pcie.c in QEMU (aka Quick Emulator) allows local guest OS users to     cause a denial of service (QEMU instance crash) via hotplug and hotunplug operations of Virtio block     devices. (CVE-2014-3471)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote host is affected by the vulnerability described in GLSA-201412-01 (QEMU: Multiple Vulnerabilities)

    Multiple vulnerabilities have been discovered in QEMU. Please review the       CVE identifiers referenced below for details.
  Impact :

    A context-dependent attacker could cause a Denial of Service condition       and a local user can obtain sensitive information.
  Workaround :

    There is no known workaround at this time.

The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2342-1 advisory.

    Michael S. Tsirkin, Anthony Liguori, and Michael Roth discovered multiple issues with QEMU state loading     after migration. An attacker able to modify the state data could use these issues to cause a denial of     service, or possibly execute arbitrary code. (CVE-2013-4148, CVE-2013-4149, CVE-2013-4150, CVE-2013-4151,     CVE-2013-4526, CVE-2013-4527, CVE-2013-4529, CVE-2013-4530, CVE-2013-4531, CVE-2013-4532, CVE-2013-4533,     CVE-2013-4534, CVE-2013-4535, CVE-2013-4536, CVE-2013-4537, CVE-2013-4538, CVE-2013-4539, CVE-2013-4540,     CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, CVE-2014-3461)

    Kevin Wolf, Stefan Hajnoczi, Fam Zheng, Jeff Cody, Stefan Hajnoczi, and others discovered multiple issues     in the QEMU block drivers. An attacker able to modify disk images could use these issues to cause a denial     of service, or possibly execute arbitrary code. (CVE-2014-0142, CVE-2014-0143, CVE-2014-0144,     CVE-2014-0145, CVE-2014-0146, CVE-2014-0147, CVE-2014-0222, CVE-2014-0223)

    It was discovered that QEMU incorrectly handled certain PCIe bus hotplug operations. A malicious guest     could use this issue to crash the QEMU host, resulting in a denial of service. (CVE-2014-3471)

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.

ID	Name	Product	Family	Severity
218142	Linux Distros Unpatched Vulnerability : CVE-2014-3471	Nessus	Misc.	medium
79811	GLSA-201412-01 : QEMU: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	medium
77570	Ubuntu 14.04 LTS : QEMU vulnerabilities (USN-2342-1)	Nessus	Ubuntu Local Security Checks	high

Detections

Analytics

CVE-2014-3471

medium

Tenable Plugins

medium

medium

high