NewStart CGSL MAIN 6.06 (SP) : systemd Multiple Vulnerabilities (NS-SA-2026-0021)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2026-0021. The text
# itself is copyright (C) ZTE, Inc.
##

include('compat.inc');

if (description)
{
  script_id(301214);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/06");

  script_cve_id(
    "CVE-2017-9217",
    "CVE-2017-9445",
    "CVE-2018-6954",
    "CVE-2018-15686",
    "CVE-2020-1712"
  );

  script_name(english:"NewStart CGSL MAIN 6.06 (SP) : systemd Multiple Vulnerabilities (NS-SA-2026-0021)");

  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 MAIN 6.06 (SP), has systemd packages installed that are affected by
multiple vulnerabilities:

  - A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous
    Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this
    flaw to crash systemd services or potentially execute code and elevate their privileges, by sending
    specially crafted dbus messages. (CVE-2020-1712)

  - systemd-tmpfiles in systemd through 237 mishandles symlinks present in non-terminal path components, which
    allows local users to obtain ownership of arbitrary files via vectors involving creation of a directory
    and a file under that directory, and later replacing that directory with a symlink. This occurs even if
    the fs.protected_symlinks sysctl is turned on. (CVE-2018-6954)

  - systemd-resolved through 233 allows remote attackers to cause a denial of service (daemon crash) via a
    crafted DNS response with an empty question section. (CVE-2017-9217)

  - In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to
    allocate a buffer that's too small. A malicious DNS server can exploit this via a response with a
    specially crafted TCP payload to trick systemd-resolved into allocating a buffer that's too small, and
    subsequently write arbitrary data beyond the end of it. (CVE-2017-9445)

  - A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd
    re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly
    lead to root privilege escalation. Affected releases are systemd versions up to and including 239.
    (CVE-2018-15686)

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://security.gd-linux.com/notice/NS-SA-2026-0021");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2017-9217");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2017-9445");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2018-15686");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2018-6954");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2020-1712");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL systemd packages. Note that updated packages may not be available yet. Please contact ZTE
for more information.");
  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_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-6954");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-1712");

  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:"2017/05/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:systemd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:systemd-container");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:systemd-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:systemd-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:systemd-pam");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:systemd-udev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:zte:cgsl_main:6");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/ZTE-CGSL/release", "Host/ZTE-CGSL/rpm-list", "Host/cpu");

  exit(0);
}

include('rpm2.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\sMAIN\s6\.06\s\(SP\)")
  audit(AUDIT_OS_NOT, 'NewStart CGSL MAIN 6.06 (SP)');

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 MAIN 6.06 (SP)': [
    'systemd-239-58.0.4.zncgsl6_6.8.t1.0',
    'systemd-container-239-58.0.4.zncgsl6_6.8.t1.0',
    'systemd-devel-239-58.0.4.zncgsl6_6.8.t1.0',
    'systemd-libs-239-58.0.4.zncgsl6_6.8.t1.0',
    'systemd-pam-239-58.0.4.zncgsl6_6.8.t1.0',
    'systemd-udev-239-58.0.4.zncgsl6_6.8.t1.0'
  ]
};
var pkg_list = pkgs[os_release];
var pkg;
foreach (pkg in pkg_list)
  if (rpm_check(reference:pkg, release:'ZTE ' + os_release, rpm_spec_vers_cmp:TRUE)) 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, 'systemd');
}