NewStart CGSL MAIN 7.02 : vim Multiple Vulnerabilities (NS-SA-2026-0107)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2026-0107. The text
# itself is copyright (C) ZTE, Inc.
##

include('compat.inc');

if (description)
{
  script_id(343593);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/08");

  script_cve_id(
    "CVE-2026-25749",
    "CVE-2026-28417",
    "CVE-2026-28418",
    "CVE-2026-28419",
    "CVE-2026-28420",
    "CVE-2026-28421",
    "CVE-2026-28422",
    "CVE-2026-33412"
  );

  script_name(english:"NewStart CGSL MAIN 7.02 : vim Multiple Vulnerabilities (NS-SA-2026-0107)");

  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 vim packages installed that are affected by multiple
vulnerabilities:

  - Vim is an open source, command line text editor. Versions prior to 9.2.0077 have a heap-buffer-overflow
    and a segmentation fault (SEGV) exist in Vim's swap file recovery logic. Both are caused by unvalidated
    fields read from crafted pointer blocks within a swap file. Version 9.2.0077 fixes the issue.
    (CVE-2026-28421)

  - Vim is an open source, command line text editor. Prior to version 9.1.2132, a heap buffer overflow
    vulnerability exists in Vim's tag file resolution logic when processing the 'helpfile' option. The
    vulnerability is located in the get_tagfname() function in src/tag.c. When processing help file tags, Vim
    copies the user-controlled 'helpfile' option value into a fixed-size heap buffer of MAXPATHL + 1 bytes
    (typically 4097 bytes) using an unsafe STRCPY() operation without any bounds checking. This issue has been
    patched in version 9.1.2132. (CVE-2026-25749)

  - Vim is an open source, command line text editor. Prior to version 9.2.0073, an OS command injection
    vulnerability exists in the `netrw` standard plugin bundled with Vim. By inducing a user to open a crafted
    URL (e.g., using the `scp://` protocol handler), an attacker can execute arbitrary shell commands with the
    privileges of the Vim process. Version 9.2.0073 fixes the issue. (CVE-2026-28417)

  - Vim is an open source, command line text editor. Prior to version 9.2.0074, a heap-based buffer overflow
    out-of-bounds read exists in Vim's Emacs-style tags file parsing logic. When processing a malformed tags
    file, Vim can be tricked into reading up to 7 bytes beyond the allocated memory boundary. Version 9.2.0074
    fixes the issue. (CVE-2026-28418)

  - Vim is an open source, command line text editor. Prior to version 9.2.0075, a heap-based buffer underflow
    exists in Vim's Emacs-style tags file parsing logic. When processing a malformed tags file where a
    delimiter appears at the start of a line, Vim attempts to read memory immediately preceding the allocated
    buffer. Version 9.2.0075 fixes the issue. (CVE-2026-28419)

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-2026-0107");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2026-25749");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2026-28417");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2026-28418");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2026-28419");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2026-28420");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2026-28421");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2026-28422");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2026-33412");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL vim 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: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-2026-28421");

  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:"2026/02/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:vim-X11");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:vim-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:vim-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:vim-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:vim-enhanced");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:vim-filesystem");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:vim-minimal");
  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) 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\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': [
    'vim-X11-9.0.2092-5.zncgsl7.12',
    'vim-common-9.0.2092-5.zncgsl7.12',
    'vim-data-9.0.2092-5.zncgsl7.12',
    'vim-doc-9.0.2092-5.zncgsl7.12',
    'vim-enhanced-9.0.2092-5.zncgsl7.12',
    'vim-filesystem-9.0.2092-5.zncgsl7.12',
    'vim-minimal-9.0.2092-5.zncgsl7.12'
  ]
};
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, 'vim');
}