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nessusUbuntu Security Notice (C) 2016-2020 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.UBUNTU_USN-2891-1.NASL
HistoryFeb 04, 2016 - 12:00 a.m.

Ubuntu 14.04 LTS : QEMU vulnerabilities (USN-2891-1)

2016-02-0400:00:00
Ubuntu Security Notice (C) 2016-2020 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
38

CVSS2

6.9

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

CVSS3

8.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

AI Score

8.6

Confidence

High

EPSS

0.009

Percentile

83.2%

The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2891-1 advisory.

Qinghao Tang discovered that QEMU incorrectly handled PCI MSI-X support. An attacker inside the guest     could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected     Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-7549)

Lian Yihan discovered that QEMU incorrectly handled the VNC server. A remote attacker could use this issue     to cause QEMU to crash, resulting in a denial of service. (CVE-2015-8504)

Felix Wilhelm discovered a race condition in the Xen paravirtualized drivers which can cause double fetch     vulnerabilities. An attacker in the paravirtualized guest could exploit this flaw to cause a denial of     service (crash the host) or potentially execute arbitrary code on the host. (CVE-2015-8550)

Qinghao Tang discovered that QEMU incorrectly handled USB EHCI emulation support. An attacker inside the     guest could use this issue to cause QEMU to consume resources, resulting in a denial of service.
(CVE-2015-8558)

Qinghao Tang discovered that QEMU incorrectly handled the vmxnet3 device. An attacker inside the guest     could use this issue to cause QEMU to consume resources, resulting in a denial of service. This issue only     affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-8567, CVE-2015-8568)

Qinghao Tang discovered that QEMU incorrectly handled SCSI MegaRAID SAS HBA emulation. An attacker inside     the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only     affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-8613)

Ling Liu discovered that QEMU incorrectly handled the Human Monitor Interface. A local attacker could use     this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04     LTS and Ubuntu 15.10. (CVE-2015-8619, CVE-2016-1922)

David Alan Gilbert discovered that QEMU incorrectly handled the Q35 chipset emulation when performing VM     guest migrations. An attacker could use this issue to cause QEMU to crash, resulting in a denial of     service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-8666)

Ling Liu discovered that QEMU incorrectly handled the NE2000 device. An attacker inside the guest could     use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2015-8743)

It was discovered that QEMU incorrectly handled the vmxnet3 device. An attacker inside the guest could use     this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04     LTS and Ubuntu 15.10. (CVE-2015-8744, CVE-2015-8745)

Qinghao Tang discovered that QEMU incorrect handled IDE AHCI emulation. An attacker inside the 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-2016-1568)

Donghai Zhu discovered that QEMU incorrect handled the firmware configuration device. An attacker inside     the 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-2016-1714)

It was discovered that QEMU incorrectly handled the e1000 device. An attacker inside the guest could use     this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2016-1981)

Zuozhi Fzz discovered that QEMU incorrectly handled IDE AHCI emulation. An attacker inside the guest could     use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu     15.10. (CVE-2016-2197)

Zuozhi Fzz discovered that QEMU incorrectly handled USB EHCI emulation. An attacker inside the guest could     use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu     14.04 LTS and Ubuntu 15.10. (CVE-2016-2198)

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.

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-2891-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(88576);
  script_version("2.18");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2015-7549",
    "CVE-2015-8504",
    "CVE-2015-8550",
    "CVE-2015-8558",
    "CVE-2015-8567",
    "CVE-2015-8568",
    "CVE-2015-8613",
    "CVE-2015-8619",
    "CVE-2015-8666",
    "CVE-2015-8743",
    "CVE-2015-8744",
    "CVE-2015-8745",
    "CVE-2016-1568",
    "CVE-2016-1714",
    "CVE-2016-1922",
    "CVE-2016-1981",
    "CVE-2016-2197",
    "CVE-2016-2198"
  );
  script_xref(name:"USN", value:"2891-1");

  script_name(english:"Ubuntu 14.04 LTS : QEMU vulnerabilities (USN-2891-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in
the USN-2891-1 advisory.

    Qinghao Tang discovered that QEMU incorrectly handled PCI MSI-X support. An attacker inside the guest
    could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected
    Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-7549)

    Lian Yihan discovered that QEMU incorrectly handled the VNC server. A remote attacker could use this issue
    to cause QEMU to crash, resulting in a denial of service. (CVE-2015-8504)

    Felix Wilhelm discovered a race condition in the Xen paravirtualized drivers which can cause double fetch
    vulnerabilities. An attacker in the paravirtualized guest could exploit this flaw to cause a denial of
    service (crash the host) or potentially execute arbitrary code on the host. (CVE-2015-8550)

    Qinghao Tang discovered that QEMU incorrectly handled USB EHCI emulation support. An attacker inside the
    guest could use this issue to cause QEMU to consume resources, resulting in a denial of service.
    (CVE-2015-8558)

    Qinghao Tang discovered that QEMU incorrectly handled the vmxnet3 device. An attacker inside the guest
    could use this issue to cause QEMU to consume resources, resulting in a denial of service. This issue only
    affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-8567, CVE-2015-8568)

    Qinghao Tang discovered that QEMU incorrectly handled SCSI MegaRAID SAS HBA emulation. An attacker inside
    the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only
    affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-8613)

    Ling Liu discovered that QEMU incorrectly handled the Human Monitor Interface. A local attacker could use
    this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04
    LTS and Ubuntu 15.10. (CVE-2015-8619, CVE-2016-1922)

    David Alan Gilbert discovered that QEMU incorrectly handled the Q35 chipset emulation when performing VM
    guest migrations. An attacker could use this issue to cause QEMU to crash, resulting in a denial of
    service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-8666)

    Ling Liu discovered that QEMU incorrectly handled the NE2000 device. An attacker inside the guest could
    use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2015-8743)

    It was discovered that QEMU incorrectly handled the vmxnet3 device. An attacker inside the guest could use
    this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04
    LTS and Ubuntu 15.10. (CVE-2015-8744, CVE-2015-8745)

    Qinghao Tang discovered that QEMU incorrect handled IDE AHCI emulation. An attacker inside the 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-2016-1568)

    Donghai Zhu discovered that QEMU incorrect handled the firmware configuration device. An attacker inside
    the 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-2016-1714)

    It was discovered that QEMU incorrectly handled the e1000 device. An attacker inside the guest could use
    this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2016-1981)

    Zuozhi Fzz discovered that QEMU incorrectly handled IDE AHCI emulation. An attacker inside the guest could
    use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu
    15.10. (CVE-2016-2197)

    Zuozhi Fzz discovered that QEMU incorrectly handled USB EHCI emulation. An attacker inside the guest could
    use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu
    14.04 LTS and Ubuntu 15.10. (CVE-2016-2198)

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.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-2891-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-1714");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2016-1568");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/04/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/02/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/02/04");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-aarch64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-arm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-mips");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-misc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-ppc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-sparc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-x86");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-user");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-user-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-utils");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-guest-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-keymaps");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2016-2020 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('14.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '14.04', 'pkgname': 'qemu', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-common', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-guest-agent', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-keymaps', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-kvm', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-system', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-system-aarch64', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-system-arm', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-system-common', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-system-mips', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-system-misc', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-system-ppc', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-system-sparc', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-system-x86', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-user', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-user-static', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'},
    {'osver': '14.04', 'pkgname': 'qemu-utils', 'pkgver': '2.0.0+dfsg-2ubuntu1.22'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'qemu / qemu-common / qemu-guest-agent / qemu-keymaps / qemu-kvm / etc');
}

References

CVSS2

6.9

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

CVSS3

8.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

AI Score

8.6

Confidence

High

EPSS

0.009

Percentile

83.2%