Oracle Linux 5 : kernel (ELSA-2018-4235)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2018-4235.
##

include('compat.inc');

if (description)
{
  script_id(180831);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/07");

  script_cve_id(
    "CVE-2009-2910",
    "CVE-2017-14106",
    "CVE-2018-3620",
    "CVE-2018-3639"
  );
  script_xref(name:"IAVA", value:"2010-A-0015-S");
  script_xref(name:"IAVA", value:"2018-A-0170");

  script_name(english:"Oracle Linux 5 : kernel (ELSA-2018-4235)");

  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 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ELSA-2018-4235 advisory.

  - arch/x86/ia32/ia32entry.S in the Linux kernel before 2.6.31.4 on the x86_64 platform does not clear
    certain kernel registers before a return to user mode, which allows local users to read register values
    from an earlier process by switching an ia32 process to 64-bit mode. (CVE-2009-2910)

  - The tcp_disconnect function in net/ipv4/tcp.c in the Linux kernel before 4.12 allows local users to cause
    a denial of service (__tcp_select_window divide-by-zero error and system crash) by triggering a disconnect
    within a certain tcp_recvmsg code path. (CVE-2017-14106)

  - 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)

  - Systems with microprocessors utilizing speculative execution and address translations may allow
    unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access
    via a terminal page fault and a side-channel analysis. (CVE-2018-3620)

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://linux.oracle.com/errata/ELSA-2018-4235.html");
  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:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-3620");

  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:"2009/10/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/10/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/07");

  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:"p-cpe:/a:oracle:linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-PAE");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-PAE-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-xen-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ocfs2-2.6.18-419.0.0.0.12.el5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ocfs2-2.6.18-419.0.0.0.12.el5PAE");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ocfs2-2.6.18-419.0.0.0.12.el5debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ocfs2-2.6.18-419.0.0.0.12.el5xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:oracleasm-2.6.18-419.0.0.0.12.el5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:oracleasm-2.6.18-419.0.0.0.12.el5PAE");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:oracleasm-2.6.18-419.0.0.0.12.el5debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:oracleasm-2.6.18-419.0.0.0.12.el5xen");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2023 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('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 os_release = get_kb_item("Host/RedHat/release");
if (isnull(os_release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:os_release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^5([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 5', '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 = ['2.6.18-419.0.0.0.12.el5'];
  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-2018-4235');
    }
  }
  __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-headers-2.6.18-419.0.0.0.12.el5', 'cpu':'i386', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-headers-2.6.18'},
    {'reference':'kernel-2.6.18-419.0.0.0.12.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-2.6.18'},
    {'reference':'kernel-PAE-2.6.18-419.0.0.0.12.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-PAE-2.6.18'},
    {'reference':'kernel-PAE-devel-2.6.18-419.0.0.0.12.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-PAE-devel-2.6.18'},
    {'reference':'kernel-debug-2.6.18-419.0.0.0.12.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debug-2.6.18'},
    {'reference':'kernel-debug-devel-2.6.18-419.0.0.0.12.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debug-devel-2.6.18'},
    {'reference':'kernel-devel-2.6.18-419.0.0.0.12.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-devel-2.6.18'},
    {'reference':'kernel-xen-2.6.18-419.0.0.0.12.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-xen-2.6.18'},
    {'reference':'kernel-xen-devel-2.6.18-419.0.0.0.12.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-xen-devel-2.6.18'},
    {'reference':'ocfs2-2.6.18-419.0.0.0.12.el5-1.4.11-1.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ocfs2-2.6.18-419.0.0.0.12.el5PAE-1.4.11-1.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ocfs2-2.6.18-419.0.0.0.12.el5debug-1.4.11-1.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ocfs2-2.6.18-419.0.0.0.12.el5xen-1.4.11-1.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'oracleasm-2.6.18-419.0.0.0.12.el5-2.0.5-2.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'oracleasm-2.6.18-419.0.0.0.12.el5PAE-2.0.5-2.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'oracleasm-2.6.18-419.0.0.0.12.el5debug-2.0.5-2.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'oracleasm-2.6.18-419.0.0.0.12.el5xen-2.0.5-2.el5', 'cpu':'i686', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-2.6.18-419.0.0.0.12.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-2.6.18'},
    {'reference':'kernel-debug-2.6.18-419.0.0.0.12.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debug-2.6.18'},
    {'reference':'kernel-debug-devel-2.6.18-419.0.0.0.12.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-debug-devel-2.6.18'},
    {'reference':'kernel-devel-2.6.18-419.0.0.0.12.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-devel-2.6.18'},
    {'reference':'kernel-headers-2.6.18-419.0.0.0.12.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-headers-2.6.18'},
    {'reference':'kernel-xen-2.6.18-419.0.0.0.12.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-xen-2.6.18'},
    {'reference':'kernel-xen-devel-2.6.18-419.0.0.0.12.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-xen-devel-2.6.18'},
    {'reference':'ocfs2-2.6.18-419.0.0.0.12.el5-1.4.11-1.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ocfs2-2.6.18-419.0.0.0.12.el5debug-1.4.11-1.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ocfs2-2.6.18-419.0.0.0.12.el5xen-1.4.11-1.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'oracleasm-2.6.18-419.0.0.0.12.el5-2.0.5-2.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'oracleasm-2.6.18-419.0.0.0.12.el5debug-2.0.5-2.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'oracleasm-2.6.18-419.0.0.0.12.el5xen-2.0.5-2.el5', 'cpu':'x86_64', 'release':'5', 'rpm_spec_vers_cmp':TRUE}
];

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_WARNING,
      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 / kernel-PAE / kernel-PAE-devel / etc');
}