NewStart CGSL CORE 5.04 / MAIN 5.04 : samba Multiple Vulnerabilities (NS-SA-2022-0081)

2022-11-1500:00:00

www.tenable.com

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has samba packages installed that are affected by multiple vulnerabilities:

A flaw was found in the way samba implemented SMB1 authentication. An attacker could use this flaw to retrieve the plaintext password sent over the wire even if Kerberos authentication was required.
(CVE-2016-2124)
A flaw was found in the way Samba maps domain users to local users. An authenticated attacker could use this flaw to cause possible privilege escalation. (CVE-2020-25717)
The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide …enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver. Samba versions prior to 4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd, typically root. (CVE-2021-44142)

Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2022-0081. The text
# itself is copyright (C) ZTE, Inc.
##

include('compat.inc');

if (description)
{
  script_id(167472);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/02/03");

  script_cve_id("CVE-2016-2124", "CVE-2020-25717", "CVE-2021-44142");
  script_xref(name:"IAVA", value:"2022-A-0054-S");

  script_name(english:"NewStart CGSL CORE 5.04 / MAIN 5.04 : samba Multiple Vulnerabilities (NS-SA-2022-0081)");

  script_set_attribute(attribute:"synopsis", value:
"The remote NewStart CGSL host is affected by multiple vulnerabilities.");
  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
multiple vulnerabilities:

  - A flaw was found in the way samba implemented SMB1 authentication. An attacker could use this flaw to
    retrieve the plaintext password sent over the wire even if Kerberos authentication was required.
    (CVE-2016-2124)

  - A flaw was found in the way Samba maps domain users to local users. An authenticated attacker could use
    this flaw to cause possible privilege escalation. (CVE-2020-25717)

  - The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide ...enhanced compatibility
    with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver. Samba versions prior to
    4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via
    specially crafted extended file attributes. A remote attacker with write access to extended file
    attributes can execute arbitrary code with the privileges of smbd, typically root. (CVE-2021-44142)

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:"http://security.gd-linux.com/notice/NS-SA-2022-0081");
  script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2016-2124");
  script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2020-25717");
  script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/info/CVE-2021-44142");
  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:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-44142");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/11/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/11/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/11/15");

  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) 2022-2023 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('rpm.inc');

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

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

if (os_release !~ "CGSL CORE 5.04" &&
    os_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-4.10.16-18.el7_9',
    'ctdb-tests-4.10.16-18.el7_9',
    'libsmbclient-4.10.16-18.el7_9',
    'libsmbclient-devel-4.10.16-18.el7_9',
    'libwbclient-4.10.16-18.el7_9',
    'libwbclient-devel-4.10.16-18.el7_9',
    'samba-4.10.16-18.el7_9',
    'samba-client-4.10.16-18.el7_9',
    'samba-client-libs-4.10.16-18.el7_9',
    'samba-common-4.10.16-18.el7_9',
    'samba-common-libs-4.10.16-18.el7_9',
    'samba-common-tools-4.10.16-18.el7_9',
    'samba-dc-4.10.16-18.el7_9',
    'samba-dc-libs-4.10.16-18.el7_9',
    'samba-debuginfo-4.10.16-18.el7_9',
    'samba-devel-4.10.16-18.el7_9',
    'samba-krb5-printing-4.10.16-18.el7_9',
    'samba-libs-4.10.16-18.el7_9',
    'samba-pidl-4.10.16-18.el7_9',
    'samba-python-4.10.16-18.el7_9',
    'samba-python-test-4.10.16-18.el7_9',
    'samba-test-4.10.16-18.el7_9',
    'samba-test-libs-4.10.16-18.el7_9',
    'samba-vfs-glusterfs-4.10.16-18.el7_9',
    'samba-winbind-4.10.16-18.el7_9',
    'samba-winbind-clients-4.10.16-18.el7_9',
    'samba-winbind-krb5-locator-4.10.16-18.el7_9',
    'samba-winbind-modules-4.10.16-18.el7_9'
  ],
  'CGSL MAIN 5.04': [
    'ctdb-4.10.16-18.el7_9',
    'ctdb-tests-4.10.16-18.el7_9',
    'libsmbclient-4.10.16-18.el7_9',
    'libsmbclient-devel-4.10.16-18.el7_9',
    'libwbclient-4.10.16-18.el7_9',
    'libwbclient-devel-4.10.16-18.el7_9',
    'samba-4.10.16-18.el7_9',
    'samba-client-4.10.16-18.el7_9',
    'samba-client-libs-4.10.16-18.el7_9',
    'samba-common-4.10.16-18.el7_9',
    'samba-common-libs-4.10.16-18.el7_9',
    'samba-common-tools-4.10.16-18.el7_9',
    'samba-dc-4.10.16-18.el7_9',
    'samba-dc-libs-4.10.16-18.el7_9',
    'samba-debuginfo-4.10.16-18.el7_9',
    'samba-devel-4.10.16-18.el7_9',
    'samba-krb5-printing-4.10.16-18.el7_9',
    'samba-libs-4.10.16-18.el7_9',
    'samba-pidl-4.10.16-18.el7_9',
    'samba-python-4.10.16-18.el7_9',
    'samba-python-test-4.10.16-18.el7_9',
    'samba-test-4.10.16-18.el7_9',
    'samba-test-libs-4.10.16-18.el7_9',
    'samba-vfs-glusterfs-4.10.16-18.el7_9',
    'samba-winbind-4.10.16-18.el7_9',
    'samba-winbind-clients-4.10.16-18.el7_9',
    'samba-winbind-krb5-locator-4.10.16-18.el7_9',
    'samba-winbind-modules-4.10.16-18.el7_9'
  ]
};
var pkg_list = pkgs[os_release];

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

VendorProductVersionCPE
ztecgsl_corectdbp-cpe:/a:zte:cgsl_core:ctdb
ztecgsl_corectdb-testsp-cpe:/a:zte:cgsl_core:ctdb-tests
ztecgsl_corelibsmbclientp-cpe:/a:zte:cgsl_core:libsmbclient
ztecgsl_corelibsmbclient-develp-cpe:/a:zte:cgsl_core:libsmbclient-devel
ztecgsl_corelibwbclientp-cpe:/a:zte:cgsl_core:libwbclient
ztecgsl_corelibwbclient-develp-cpe:/a:zte:cgsl_core:libwbclient-devel
ztecgsl_coresambap-cpe:/a:zte:cgsl_core:samba
ztecgsl_coresamba-clientp-cpe:/a:zte:cgsl_core:samba-client
ztecgsl_coresamba-client-libsp-cpe:/a:zte:cgsl_core:samba-client-libs
ztecgsl_coresamba-commonp-cpe:/a:zte:cgsl_core:samba-common

Vendor	Product	Version	CPE
zte	cgsl_core	ctdb	p-cpe:/a:zte:cgsl_core:ctdb
zte	cgsl_core	ctdb-tests	p-cpe:/a:zte:cgsl_core:ctdb-tests
zte	cgsl_core	libsmbclient	p-cpe:/a:zte:cgsl_core:libsmbclient
zte	cgsl_core	libsmbclient-devel	p-cpe:/a:zte:cgsl_core:libsmbclient-devel
zte	cgsl_core	libwbclient	p-cpe:/a:zte:cgsl_core:libwbclient
zte	cgsl_core	libwbclient-devel	p-cpe:/a:zte:cgsl_core:libwbclient-devel
zte	cgsl_core	samba	p-cpe:/a:zte:cgsl_core:samba
zte	cgsl_core	samba-client	p-cpe:/a:zte:cgsl_core:samba-client
zte	cgsl_core	samba-client-libs	p-cpe:/a:zte:cgsl_core:samba-client-libs
zte	cgsl_core	samba-common	p-cpe:/a:zte:cgsl_core:samba-common