Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2013-2513)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2013-2513.
##

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

if (description)
{
  script_id(68850);
  script_version("1.18");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/09/08");

  script_cve_id(
    "CVE-2013-0268",
    "CVE-2013-0871",
    "CVE-2013-0913",
    "CVE-2013-1773"
  );
  script_bugtraq_id(
    57838,
    57986,
    58200,
    58427
  );

  script_name(english:"Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2013-2513)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 5 / 6 host has packages installed that are affected by multiple vulnerabilities as referenced in
the ELSA-2013-2513 advisory.

  - Race condition in the ptrace functionality in the Linux kernel before 3.7.5 allows local users to gain
    privileges via a PTRACE_SETREGS ptrace system call in a crafted application, as demonstrated by
    ptrace_death. (CVE-2013-0871)

  - Integer overflow in drivers/gpu/drm/i915/i915_gem_execbuffer.c in the i915 driver in the Direct Rendering
    Manager (DRM) subsystem in the Linux kernel through 3.8.3, as used in Google Chrome OS before
    25.0.1364.173 and other products, allows local users to cause a denial of service (heap-based buffer
    overflow) or possibly have unspecified other impact via a crafted application that triggers many
    relocation copies, and potentially leads to a race condition. (CVE-2013-0913)

  - Buffer overflow in the VFAT filesystem implementation in the Linux kernel before 3.3 allows local users to
    gain privileges or cause a denial of service (system crash) via a VFAT write operation on a filesystem
    with the utf8 mount option, which is not properly handled during UTF-8 to UTF-16 conversion.
    (CVE-2013-1773)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://linux.oracle.com/errata/ELSA-2013-2513.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  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_attribute(attribute:"cvss_score_source", value:"CVE-2013-0913");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2013/02/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/04/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/07/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-firmware");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2013-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("linux_alt_patch_detect.nasl", "ssh_get_info.nasl");
  script_require_keys("Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");

  exit(0);
}


include('audit.inc');
include('global_settings.inc');
include('ksplice.inc');
include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
var release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
var os_ver = os_ver[1];
if (! preg(pattern:"^(5|6)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 5 / 6', 'Oracle Linux ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) 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$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);

var machine_uptrack_level = get_one_kb_item('Host/uptrack-uname-r');
if (machine_uptrack_level)
{
  var trimmed_uptrack_level = ereg_replace(string:machine_uptrack_level, pattern:"\.(x86_64|i[3-6]86|aarch64)$", replace:'');
  var fixed_uptrack_levels = ['2.6.39-400.21.1.el5uek', '2.6.39-400.21.1.el6uek'];
  foreach var fixed_uptrack_level ( fixed_uptrack_levels ) {
    if (rpm_spec_vers_cmp(a:trimmed_uptrack_level, b:fixed_uptrack_level) >= 0)
    {
      audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for ELSA-2013-2513');
    }
  }
  __rpm_report = 'Running KSplice level of ' + trimmed_uptrack_level + ' does not meet the minimum fixed level of ' + join(fixed_uptrack_levels, sep:' / ') + ' for this advisory.\n\n';
}

var kernel_major_minor = get_kb_item('Host/uname/major_minor');
if (empty_or_null(kernel_major_minor)) exit(1, 'Unable to determine kernel major-minor level.');
var expected_kernel_major_minor = '2.6';
if (kernel_major_minor != expected_kernel_major_minor)
  audit(AUDIT_OS_NOT, 'running kernel level ' + expected_kernel_major_minor + ', it is running kernel level ' + kernel_major_minor);

var pkgs = [
    {'reference':'kernel-uek-2.6.39-400.21.1.el5uek', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-2.6.39'},
    {'reference':'kernel-uek-2.6.39-400.21.1.el5uek', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-2.6.39'},
    {'reference':'kernel-uek-debug-2.6.39-400.21.1.el5uek', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-2.6.39'},
    {'reference':'kernel-uek-debug-2.6.39-400.21.1.el5uek', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-2.6.39'},
    {'reference':'kernel-uek-debug-devel-2.6.39-400.21.1.el5uek', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-devel-2.6.39'},
    {'reference':'kernel-uek-debug-devel-2.6.39-400.21.1.el5uek', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-devel-2.6.39'},
    {'reference':'kernel-uek-devel-2.6.39-400.21.1.el5uek', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-devel-2.6.39'},
    {'reference':'kernel-uek-devel-2.6.39-400.21.1.el5uek', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-devel-2.6.39'},
    {'reference':'kernel-uek-doc-2.6.39-400.21.1.el5uek', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-doc-2.6.39'},
    {'reference':'kernel-uek-firmware-2.6.39-400.21.1.el5uek', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-firmware-2.6.39'},
    {'reference':'kernel-uek-2.6.39-400.21.1.el6uek', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-2.6.39'},
    {'reference':'kernel-uek-2.6.39-400.21.1.el6uek', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-2.6.39'},
    {'reference':'kernel-uek-debug-2.6.39-400.21.1.el6uek', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-2.6.39'},
    {'reference':'kernel-uek-debug-2.6.39-400.21.1.el6uek', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-2.6.39'},
    {'reference':'kernel-uek-debug-devel-2.6.39-400.21.1.el6uek', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-devel-2.6.39'},
    {'reference':'kernel-uek-debug-devel-2.6.39-400.21.1.el6uek', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-devel-2.6.39'},
    {'reference':'kernel-uek-devel-2.6.39-400.21.1.el6uek', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-devel-2.6.39'},
    {'reference':'kernel-uek-devel-2.6.39-400.21.1.el6uek', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-devel-2.6.39'},
    {'reference':'kernel-uek-doc-2.6.39-400.21.1.el6uek', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-doc-2.6.39'},
    {'reference':'kernel-uek-firmware-2.6.39-400.21.1.el6uek', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-firmware-2.6.39'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var release = NULL;
  var sp = NULL;
  var cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = 'EL' + package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference && release) {
    if (exists_check) {
        if (rpm_exists(release:release, rpm:exists_check) && rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
    } else {
        if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
    }
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'kernel-uek / kernel-uek-debug / kernel-uek-debug-devel / etc');
}