NewStart CGSL MAIN 7.02 : patch Multiple Vulnerabilities (NS-SA-2025-0205)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2025-0205. The text
# itself is copyright (C) ZTE, Inc.
##

include('compat.inc');

if (description)
{
  script_id(242710);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/07/25");

  script_cve_id(
    "CVE-2018-6951",
    "CVE-2018-6952",
    "CVE-2018-1000156",
    "CVE-2019-13638"
  );

  script_name(english:"NewStart CGSL MAIN 7.02 : patch Multiple Vulnerabilities (NS-SA-2025-0205)");

  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 patch packages installed that are affected by multiple
vulnerabilities:

  - GNU patch through 2.7.6 is vulnerable to OS shell command injection that can be exploited by opening a
    crafted patch file that contains an ed style diff payload with shell metacharacters. The ed editor does
    not need to be present on the vulnerable system. This is different from CVE-2018-1000156. (CVE-2019-13638)

  - GNU Patch version 2.7.6 contains an input validation vulnerability when processing patch files,
    specifically the EDITOR_PROGRAM invocation (using ed) can result in code execution. This attack appear to
    be exploitable via a patch file processed via the patch utility. This is similar to FreeBSD's
    CVE-2015-1418 however although they share a common ancestry the code bases have diverged over time.
    (CVE-2018-1000156)

  - An issue was discovered in GNU patch through 2.7.6. There is a segmentation fault, associated with a NULL
    pointer dereference, leading to a denial of service in the intuit_diff_type function in pch.c, aka a
    mangled rename issue. (CVE-2018-6951)

  - A double free exists in the another_hunk function in pch.c in GNU patch through 2.7.6. (CVE-2018-6952)

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-2025-0205");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2018-1000156");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2018-6951");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2018-6952");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2019-13638");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL patch 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: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:N/UI:R/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-2019-13638");

  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:"2018/02/03");
  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:patch");
  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': [
    'patch-2.7.6-3.zncgsl7.3'
  ]
};
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, 'patch');
}