Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-3655-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3655-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(110050);
  script_version("1.14");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");

  script_cve_id(
    "CVE-2017-12134",
    "CVE-2017-13220",
    "CVE-2017-13305",
    "CVE-2017-17449",
    "CVE-2017-18079",
    "CVE-2017-18203",
    "CVE-2017-18204",
    "CVE-2017-18208",
    "CVE-2017-18221",
    "CVE-2018-3639",
    "CVE-2018-8822"
  );
  script_xref(name:"USN", value:"3655-1");

  script_name(english:"Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-3655-1)");

  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 a package installed that is affected by multiple vulnerabilities as referenced in
the USN-3655-1 advisory.

  - The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users
    to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial
    of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation.
    (CVE-2017-12134)

  - An elevation of privilege vulnerability in the Upstream kernel bluez. Product: Android. Versions: Android
    kernel. Android ID: A-63527053. (CVE-2017-13220)

  - A information disclosure vulnerability in the Upstream kernel encrypted-keys. Product: Android. Versions:
    Android kernel. Android ID: A-70526974. (CVE-2017-13305)

  - The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4,
    when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net
    namespace, which allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN
    capability to sniff an nlmon interface for all Netlink activity on the system. (CVE-2017-17449)

  - drivers/input/serio/i8042.c in the Linux kernel before 4.12.4 allows attackers to cause a denial of
    service (NULL pointer dereference and system crash) or possibly have unspecified other impact because the
    port->exists value can change after it is validated. (CVE-2017-18079)

  - The dm_get_from_kobject function in drivers/md/dm.c in the Linux kernel before 4.14.3 allow local users to
    cause a denial of service (BUG) by leveraging a race condition with __dm_destroy during creation and
    removal of DM devices. (CVE-2017-18203)

  - The ocfs2_setattr function in fs/ocfs2/file.c in the Linux kernel before 4.14.2 allows local users to
    cause a denial of service (deadlock) via DIO requests. (CVE-2017-18204)

  - The madvise_willneed function in mm/madvise.c in the Linux kernel before 4.14.4 allows local users to
    cause a denial of service (infinite loop) by triggering use of MADVISE_WILLNEED for a DAX mapping.
    (CVE-2017-18208)

  - The __munlock_pagevec function in mm/mlock.c in the Linux kernel before 4.11.4 allows local users to cause
    a denial of service (NR_MLOCK accounting corruption) via crafted use of mlockall and munlockall system
    calls. (CVE-2017-18221)

  - Systems with microprocessors utilizing speculative execution and speculative execution of memory reads
    before the addresses of all prior memory writes are known may allow unauthorized disclosure of information
    to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB),
    Variant 4. (CVE-2018-3639)

  - Incorrect buffer length handling in the ncp_read_kernel function in fs/ncpfs/ncplib_kernel.c in the Linux
    kernel through 4.15.11, and in drivers/staging/ncpfs/ncplib_kernel.c in the Linux kernel 4.16-rc through
    4.16-rc6, could be exploited by malicious NCPFS servers to crash the kernel or execute code.
    (CVE-2018-8822)

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-3655-1");
  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:C/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-2018-8822");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2017-12134");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/08/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/05/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-149-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-149-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-149-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-149-powerpc-e500");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-149-powerpc-e500mc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-149-powerpc-smp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-149-powerpc64-emb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-149-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': {
    '3.13.0': {
      'generic': '3.13.0-149',
      'generic-lpae': '3.13.0-149',
      'lowlatency': '3.13.0-149',
      'powerpc-e500': '3.13.0-149',
      'powerpc-e500mc': '3.13.0-149',
      'powerpc-smp': '3.13.0-149',
      'powerpc64-emb': '3.13.0-149',
      'powerpc64-smp': '3.13.0-149'
    }
  }
};

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 = 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-3655-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2017-12134', 'CVE-2017-13220', 'CVE-2017-13305', 'CVE-2017-17449', 'CVE-2017-18079', 'CVE-2017-18203', 'CVE-2017-18204', 'CVE-2017-18208', 'CVE-2017-18221', 'CVE-2018-3639', 'CVE-2018-8822');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-3655-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}