Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-2544-1)

#%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-2544-1. 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(82071);
  script_version("1.17");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");

  script_cve_id(
    "CVE-2013-7421",
    "CVE-2014-7822",
    "CVE-2014-9644",
    "CVE-2014-9728",
    "CVE-2014-9729",
    "CVE-2014-9730",
    "CVE-2014-9731",
    "CVE-2015-0274"
  );
  script_bugtraq_id(72320, 72322, 73156);
  script_xref(name:"USN", value:"2544-1");

  script_name(english:"Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-2544-1)");

  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-2544-1 advisory.

  - The Crypto API in the Linux kernel before 3.18.5 allows local users to load arbitrary kernel modules via a
    bind system call for an AF_ALG socket with a module name in the salg_name field, a different vulnerability
    than CVE-2014-9644. (CVE-2013-7421)

  - The implementation of certain splice_write file operations in the Linux kernel before 3.16 does not
    enforce a restriction on the maximum size of a single file, which allows local users to cause a denial of
    service (system crash) or possibly have unspecified other impact via a crafted splice system call, as
    demonstrated by use of a file descriptor associated with an ext4 filesystem. (CVE-2014-7822)

  - The Crypto API in the Linux kernel before 3.18.5 allows local users to load arbitrary kernel modules via a
    bind system call for an AF_ALG socket with a parenthesized module template expression in the salg_name
    field, as demonstrated by the vfat(aes) expression, a different vulnerability than CVE-2013-7421.
    (CVE-2014-9644)

  - The UDF filesystem implementation in the Linux kernel before 3.18.2 does not validate certain lengths,
    which allows local users to cause a denial of service (buffer over-read and system crash) via a crafted
    filesystem image, related to fs/udf/inode.c and fs/udf/symlink.c. (CVE-2014-9728)

  - The udf_read_inode function in fs/udf/inode.c in the Linux kernel before 3.18.2 does not ensure a certain
    data-structure size consistency, which allows local users to cause a denial of service (system crash) via
    a crafted UDF filesystem image. (CVE-2014-9729)

  - The udf_pc_to_char function in fs/udf/symlink.c in the Linux kernel before 3.18.2 relies on component
    lengths that are unused, which allows local users to cause a denial of service (system crash) via a
    crafted UDF filesystem image. (CVE-2014-9730)

  - The UDF filesystem implementation in the Linux kernel before 3.18.2 does not ensure that space is
    available for storing a symlink target's name along with a trailing \0 character, which allows local users
    to obtain sensitive information via a crafted filesystem image, related to fs/udf/symlink.c and
    fs/udf/unicode.c. (CVE-2014-9731)

  - The XFS implementation in the Linux kernel before 3.15 improperly uses an old size value during remote
    attribute replacement, which allows local users to cause a denial of service (transaction overrun and data
    corruption) or possibly gain privileges by leveraging XFS filesystem access. (CVE-2015-0274)

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-2544-1");
  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: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-2015-0274");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2014-9730");

  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:"2015/03/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/03/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/03/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-48-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-48-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-48-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-48-powerpc-e500");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-48-powerpc-e500mc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-48-powerpc-smp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-48-powerpc64-emb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-48-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) 2015-2020 Canonical, Inc. / NASL script (C) 2015-2019 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': '3.13.0-48',
      'generic-lpae': '3.13.0-48',
      'lowlatency': '3.13.0-48',
      'powerpc-e500': '3.13.0-48',
      'powerpc-e500mc': '3.13.0-48',
      'powerpc-smp': '3.13.0-48',
      'powerpc64-emb': '3.13.0-48',
      'powerpc64-smp': '3.13.0-48'
    }
  }
};

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-2544-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2013-7421', 'CVE-2014-7822', 'CVE-2014-9644', 'CVE-2014-9728', 'CVE-2014-9729', 'CVE-2014-9730', 'CVE-2014-9731', 'CVE-2015-0274');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-2544-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}