NewStart CGSL MAIN 7.02 : avahi Multiple Vulnerabilities (NS-SA-2025-0174)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2025-0174. The text
# itself is copyright (C) ZTE, Inc.
##

include('compat.inc');

if (description)
{
  script_id(242766);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/07/25");

  script_cve_id(
    "CVE-2021-3468",
    "CVE-2023-1981",
    "CVE-2023-38469",
    "CVE-2023-38470",
    "CVE-2023-38471",
    "CVE-2023-38472",
    "CVE-2023-38473"
  );

  script_name(english:"NewStart CGSL MAIN 7.02 : avahi Multiple Vulnerabilities (NS-SA-2025-0174)");

  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 7.02, has avahi packages installed that are affected by multiple
vulnerabilities:

  - A vulnerability was found in Avahi. A reachable assertion exists in the avahi_alternative_host_name()
    function. (CVE-2023-38473)

  - A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the
    client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing
    a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the
    availability of the avahi service, which becomes unresponsive after this flaw is triggered.
    (CVE-2021-3468)

  - A vulnerability was found in the avahi library. This flaw allows an unprivileged user to make a dbus call,
    causing the avahi daemon to crash. (CVE-2023-1981)

  - A vulnerability was found in Avahi, where a reachable assertion exists in avahi_dns_packet_append_record.
    (CVE-2023-38469)

  - A vulnerability was found in Avahi. A reachable assertion exists in the avahi_escape_label() function.
    (CVE-2023-38470)

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-2025-0174");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2021-3468");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2023-1981");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2023-38469");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2023-38470");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2023-38471");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2023-38472");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2023-38473");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL avahi 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:N/I:N/A:P");
  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:N/I:N/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-2021-3468");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2023-38473");

  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:"2021/06/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/07/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/07/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:avahi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:avahi-autoipd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:avahi-compat-libdns_sd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:avahi-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:avahi-glib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:avahi-gobject");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:avahi-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:avahi-ui-gtk3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:zte:cgsl_main:7");
  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) 2025 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\s7\.02")
  audit(AUDIT_OS_NOT, 'NewStart CGSL MAIN 7.02');

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 7.02': [
    'avahi-0.8-7.zncgsl7.7',
    'avahi-autoipd-0.8-7.zncgsl7.7',
    'avahi-compat-libdns_sd-0.8-7.zncgsl7.7',
    'avahi-devel-0.8-7.zncgsl7.7',
    'avahi-glib-0.8-7.zncgsl7.7',
    'avahi-gobject-0.8-7.zncgsl7.7',
    'avahi-libs-0.8-7.zncgsl7.7',
    'avahi-ui-gtk3-0.8-7.zncgsl7.7'
  ]
};
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_NOTE,
    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, 'avahi');
}