Oracle Linux 7 : gdm / and / gnome-session (ELSA-2017-2128)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2017:2128 and 
# Oracle Linux Security Advisory ELSA-2017-2128 respectively.
#

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

if (description)
{
  script_id(102297);
  script_version("3.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/11/01");

  script_cve_id("CVE-2015-7496");
  script_xref(name:"RHSA", value:"2017:2128");

  script_name(english:"Oracle Linux 7 : gdm / and / gnome-session (ELSA-2017-2128)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the
ELSA-2017-2128 advisory.

    gdm
    [3.22.3-11]
    - Add japanese translation
      Resolves: #1449632

    [3.22.3-10]
    - Add patches to try to maintain some semblance of compatibility
      when live upgrading between 7.3 and 7.4
      Related: #1448786

    [3.22.3-9]
    - Make sure reauthentication is run within the user
      session.
      Resolves:#1448209

    [3.22.3-8]
    - Reap transient login screens when they are no longer needed
    - Jump to login screen if we end up on a blank VT
      Resolves: #1301028

    [3.22.3-7]
    - Fix user switching
      Related: #1386862

    [3.22.3-6]
    - Fix indirect XDMCP
      Resolves: #1273156

    [3.22.3-5]
    - Attempt to fix po file installation
      Related: #1386862

    [3.22.3-4]
    - Drop reference to wayland in config file
    - use autosetup to simplify spec maintenance
      Related: #1386862

    [3.22.3-3]
    - Don't fall over if autologin user isn't available
      Resolves #1373837

    [1:3.22.3-2]
    - Honor anaconda's firstboot being disabled
      Resolves: #1226819

    [3.22.3-1]
    - Rebase to 3.22.3
      Resolves: #1386862

    [3.14.2-19]
    - Add error traps around XKillClient calls, fixes regression
      on logout
      Resolves: #1377987

    gnome-session
    [3.22.3-4]
    - fix crash in fail whale
      Resolves: #1392970

    [3.22.3-3]
    - Fix the ability to disable a service from session properties
      Resolves: #1310975

    [3.22.3-2]
    - Drop gnome-xorg.desktop
      Related: #1386957

    [3.22.3-1]
    - Rebase to 3.22.3
      Resolves: #1386957

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

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-2017-2128.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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2015-7496");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/11/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gdm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gdm-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gnome-session");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gnome-session-custom-session");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gnome-session-xsession");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2017-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


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:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 7', '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 pkgs = [
    {'reference':'gdm-3.22.3-11.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'gdm-devel-3.22.3-11.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'gnome-session-3.22.3-4.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gnome-session-custom-session-3.22.3-4.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gnome-session-xsession-3.22.3-4.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gdm-3.22.3-11.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'gdm-devel-3.22.3-11.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'gnome-session-3.22.3-4.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gnome-session-custom-session-3.22.3-4.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gnome-session-xsession-3.22.3-4.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gdm-3.22.3-11.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'gdm-devel-3.22.3-11.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'gnome-session-3.22.3-4.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gnome-session-custom-session-3.22.3-4.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gnome-session-xsession-3.22.3-4.el7', 'cpu':'x86_64', 'release':'7', '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_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, 'gdm / gdm-devel / gnome-session / etc');
}