Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3753-2)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3753-2. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(112112);
  script_version("1.13");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2017-13168",
    "CVE-2018-10876",
    "CVE-2018-10877",
    "CVE-2018-10878",
    "CVE-2018-10879",
    "CVE-2018-10881",
    "CVE-2018-10882",
    "CVE-2018-12233",
    "CVE-2018-13094",
    "CVE-2018-13405",
    "CVE-2018-13406"
  );
  script_xref(name:"USN", value:"3753-2");

  script_name(english:"Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3753-2)");

  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 a package installed that is affected by multiple vulnerabilities as referenced in
the USN-3753-2 advisory.

    USN-3753-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the
    corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
    14.04 LTS.

    It was discovered that the generic SCSI driver in the Linux kernel did not properly enforce permissions on
    kernel memory access. A local attacker could use this to expose sensitive information or possibly elevate
    privileges. (CVE-2017-13168)

    Wen Xu discovered that a use-after-free vulnerability existed in the ext4 filesystem implementation in the
    Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could
    cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10876,
    CVE-2018-10879)

    Wen Xu discovered that a buffer overflow existed in the ext4 filesystem implementation in the Linux
    kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a
    denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10877)

    Wen Xu discovered that an out-of-bounds write vulnerability existed in the ext4 filesystem implementation
    in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted,
    could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10878,
    CVE-2018-10882)

    Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly keep meta-
    data information consistent in some situations. An attacker could use this to construct a malicious ext4
    image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10881)

    Shankara Pailoor discovered that the JFS filesystem implementation in the Linux kernel contained a buffer
    overflow when handling extended attributes. A local attacker could use this to cause a denial of service
    (system crash) or possibly execute arbitrary code. (CVE-2018-12233)

    Wen Xu discovered that the XFS filesystem implementation in the Linux kernel did not properly handle an
    error condition with a corrupted xfs image. An attacker could use this to construct a malicious xfs image
    that, when mounted, could cause a denial of service (system crash). (CVE-2018-13094)

    It was discovered that the Linux kernel did not properly handle setgid file creation when performed by a
    non-member of the group. A local attacker could use this to gain elevated privileges. (CVE-2018-13405)

    Silvio Cesare discovered that the generic VESA frame buffer driver in the Linux kernel contained an
    integer overflow. A local attacker could use this to cause a denial of service (system crash) or possibly
    execute arbitrary code. (CVE-2018-13406)

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-3753-2");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-13406");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/12/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1028-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-134-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-134-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-134-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-134-powerpc-e500mc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-134-powerpc-smp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-134-powerpc64-emb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-134-powerpc64-smp");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  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) 2018-2024 Canonical, Inc. / NASL script (C) 2018-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include('debian_package.inc');
include('ksplice.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 kernel_mappings = {
  '14.04': {
    '4.4.0': {
      'generic': '4.4.0-134',
      'generic-lpae': '4.4.0-134',
      'lowlatency': '4.4.0-134',
      'powerpc-e500mc': '4.4.0-134',
      'powerpc-smp': '4.4.0-134',
      'powerpc64-emb': '4.4.0-134',
      'powerpc64-smp': '4.4.0-134',
      'aws': '4.4.0-1028'
    }
  }
};

var host_kernel_release = get_kb_item('Host/uptrack-uname-r');
if (empty_or_null(host_kernel_release)) host_kernel_release = get_kb_item_or_exit('Host/uname-r');
var host_kernel_base_version = get_kb_item_or_exit('Host/Debian/kernel-base-version');
var host_kernel_type = get_kb_item_or_exit('Host/Debian/kernel-type');
if(empty_or_null(kernel_mappings[os_release][host_kernel_base_version][host_kernel_type])) audit(AUDIT_INST_VER_NOT_VULN, 'kernel ' + host_kernel_release);

var extra = '';
var kernel_fixed_version = kernel_mappings[os_release][host_kernel_base_version][host_kernel_type] + "-" + host_kernel_type;
if (deb_ver_cmp(ver1:host_kernel_release, ver2:kernel_fixed_version) < 0)
{
  extra += 'Running Kernel level of ' + host_kernel_release + ' does not meet the minimum fixed level of ' + kernel_fixed_version + ' for this advisory.\n\n';
}
  else
{
  audit(AUDIT_PATCH_INSTALLED, 'Kernel package for USN-3753-2');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2017-13168', 'CVE-2018-10876', 'CVE-2018-10877', 'CVE-2018-10878', 'CVE-2018-10879', 'CVE-2018-10881', 'CVE-2018-10882', 'CVE-2018-12233', 'CVE-2018-13094', 'CVE-2018-13405', 'CVE-2018-13406');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-3753-2');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}