NewStart CGSL MAIN 7.02 : shim Multiple Vulnerabilities (NS-SA-2025-0179)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2025-0179. The text
# itself is copyright (C) ZTE, Inc.
##

include('compat.inc');

if (description)
{
  script_id(242792);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/07/25");

  script_cve_id(
    "CVE-2023-40546",
    "CVE-2023-40549",
    "CVE-2023-40550",
    "CVE-2023-40551"
  );

  script_name(english:"NewStart CGSL MAIN 7.02 : shim Multiple Vulnerabilities (NS-SA-2025-0179)");

  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 shim packages installed that are affected by multiple
vulnerabilities:

  - A flaw was found in the MZ binary format in Shim. An out-of-bounds read may occur, leading to a crash or
    possible exposure of sensitive data during the system's boot phase. (CVE-2023-40551)

  - An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue
    may expose sensitive data during the system's boot phase. (CVE-2023-40550)

  - A flaw was found in Shim when an error happened while creating a new ESL variable. If Shim fails to create
    the new variable, it tries to print an error message to the user; however, the number of parameters used
    by the logging function doesn't match the format string used by it, leading to a crash under certain
    circumstances. (CVE-2023-40546)

  - An out-of-bounds read flaw was found in Shim due to the lack of proper boundary verification during the
    load of a PE binary. This flaw allows an attacker to load a crafted PE binary, triggering the issue and
    crashing Shim, resulting in a denial of service. (CVE-2023-40549)

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-2025-0179");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2023-40546");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2023-40549");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2023-40550");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2023-40551");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL shim 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:M/C:P/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:N/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-2023-40551");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2023-40550");

  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:"2023/12/11");
  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:shim-x64");
  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': [
    'shim-x64-15.7-2.zncgsl7.19'
  ]
};
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_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, 'shim');
}