NewStart CGSL CORE 5.04 / MAIN 5.04 : samba Vulnerability (NS-SA-2021-0114)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2021-0114. The text
# itself is copyright (C) ZTE, Inc.
##

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

if (description)
{
  script_id(154613);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/01/26");

  script_cve_id("CVE-2021-20254");
  script_xref(name:"IAVA", value:"2021-A-0208-S");

  script_name(english:"NewStart CGSL CORE 5.04 / MAIN 5.04 : samba Vulnerability (NS-SA-2021-0114)");

  script_set_attribute(attribute:"synopsis", value:
"The remote NewStart CGSL host is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has samba packages installed that are affected by
a vulnerability:

  - A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix
    group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end
    of the array in the case where a negative cache entry had been added to the mapping cache. This could
    cause the calling code to return those values into the process token that stores the group membership for
    a user. The highest threat from this vulnerability is to data confidentiality and integrity.
    (CVE-2021-20254)

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:"http://security.gd-linux.com/notice/NS-SA-2021-0114");
  script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2021-20254");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL samba packages. Note that updated packages may not be available yet. Please contact ZTE for
more information.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-20254");

  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:"2021/04/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/09/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:ctdb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:ctdb-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:libsmbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:libsmbclient-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:libwbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:libwbclient-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-client-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-common-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-common-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-dc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-dc-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-krb5-printing");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-pidl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-python");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-python-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-test-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-vfs-glusterfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-winbind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-winbind-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-winbind-krb5-locator");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_core:samba-winbind-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:ctdb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:ctdb-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:libsmbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:libsmbclient-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:libwbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:libwbclient-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-client-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-common-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-common-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-dc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-dc-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-krb5-printing");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-pidl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-python");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-python-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-test-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-vfs-glusterfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-winbind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-winbind-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-winbind-krb5-locator");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:samba-winbind-modules");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:zte:cgsl_core:5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:zte:cgsl_main:5");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"NewStart CGSL Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/ZTE-CGSL/release", "Host/ZTE-CGSL/rpm-list", "Host/cpu");

  exit(0);
}

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

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var release = get_kb_item('Host/ZTE-CGSL/release');
if (isnull(release) || release !~ "^CGSL (MAIN|CORE)") audit(AUDIT_OS_NOT, 'NewStart Carrier Grade Server Linux');

if (release !~ "CGSL CORE 5.04" &&
    release !~ "CGSL MAIN 5.04")
  audit(AUDIT_OS_NOT, 'NewStart CGSL CORE 5.04 / NewStart CGSL MAIN 5.04');

if (!get_kb_item('Host/ZTE-CGSL/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'NewStart Carrier Grade Server Linux', cpu);

var flag = 0;

var pkgs = {
  'CGSL CORE 5.04': [
    'ctdb-4.10.16-15.el7_9',
    'ctdb-tests-4.10.16-15.el7_9',
    'libsmbclient-4.10.16-15.el7_9',
    'libsmbclient-devel-4.10.16-15.el7_9',
    'libwbclient-4.10.16-15.el7_9',
    'libwbclient-devel-4.10.16-15.el7_9',
    'samba-4.10.16-15.el7_9',
    'samba-client-4.10.16-15.el7_9',
    'samba-client-libs-4.10.16-15.el7_9',
    'samba-common-4.10.16-15.el7_9',
    'samba-common-libs-4.10.16-15.el7_9',
    'samba-common-tools-4.10.16-15.el7_9',
    'samba-dc-4.10.16-15.el7_9',
    'samba-dc-libs-4.10.16-15.el7_9',
    'samba-debuginfo-4.10.16-15.el7_9',
    'samba-devel-4.10.16-15.el7_9',
    'samba-krb5-printing-4.10.16-15.el7_9',
    'samba-libs-4.10.16-15.el7_9',
    'samba-pidl-4.10.16-15.el7_9',
    'samba-python-4.10.16-15.el7_9',
    'samba-python-test-4.10.16-15.el7_9',
    'samba-test-4.10.16-15.el7_9',
    'samba-test-libs-4.10.16-15.el7_9',
    'samba-vfs-glusterfs-4.10.16-15.el7_9',
    'samba-winbind-4.10.16-15.el7_9',
    'samba-winbind-clients-4.10.16-15.el7_9',
    'samba-winbind-krb5-locator-4.10.16-15.el7_9',
    'samba-winbind-modules-4.10.16-15.el7_9'
  ],
  'CGSL MAIN 5.04': [
    'ctdb-4.10.16-15.el7_9',
    'ctdb-tests-4.10.16-15.el7_9',
    'libsmbclient-4.10.16-15.el7_9',
    'libsmbclient-devel-4.10.16-15.el7_9',
    'libwbclient-4.10.16-15.el7_9',
    'libwbclient-devel-4.10.16-15.el7_9',
    'samba-4.10.16-15.el7_9',
    'samba-client-4.10.16-15.el7_9',
    'samba-client-libs-4.10.16-15.el7_9',
    'samba-common-4.10.16-15.el7_9',
    'samba-common-libs-4.10.16-15.el7_9',
    'samba-common-tools-4.10.16-15.el7_9',
    'samba-dc-4.10.16-15.el7_9',
    'samba-dc-libs-4.10.16-15.el7_9',
    'samba-debuginfo-4.10.16-15.el7_9',
    'samba-devel-4.10.16-15.el7_9',
    'samba-krb5-printing-4.10.16-15.el7_9',
    'samba-libs-4.10.16-15.el7_9',
    'samba-pidl-4.10.16-15.el7_9',
    'samba-python-4.10.16-15.el7_9',
    'samba-python-test-4.10.16-15.el7_9',
    'samba-test-4.10.16-15.el7_9',
    'samba-test-libs-4.10.16-15.el7_9',
    'samba-vfs-glusterfs-4.10.16-15.el7_9',
    'samba-winbind-4.10.16-15.el7_9',
    'samba-winbind-clients-4.10.16-15.el7_9',
    'samba-winbind-krb5-locator-4.10.16-15.el7_9',
    'samba-winbind-modules-4.10.16-15.el7_9'
  ]
};
var pkg_list = pkgs[release];

foreach (pkg in pkg_list)
  if (rpm_check(release:'ZTE ' + release, reference:pkg)) 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, 'samba');
}