GitLab < 17.10.7 / 17.11 < 17.11.3 / 18.0 < 18.0.1 (CVE-2025-4979)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(237108);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/06/12");

  script_cve_id("CVE-2025-4979");
  script_xref(name:"IAVA", value:"2025-A-0376-S");

  script_name(english:"GitLab < 17.10.7 / 17.11 < 17.11.3 / 18.0 < 18.0.1 (CVE-2025-4979)");

  script_set_attribute(attribute:"synopsis", value:
"The version of GitLab installed on the remote host is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of GitLab installed on the remote host is affected by a vulnerability, as follows:

  - An issue has been discovered in GitLab CE/EE affecting all versions before 17.10.7, 17.11 before 17.11.3,
    and 18.0 before 18.0.1. An attacker may be able to reveal masked or hidden CI variables (that they did not
    author) in the WebUI, by simply creating their own variable and observing the HTTP response.
    (CVE-2025-4979)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://gitlab.com/gitlab-org/cves/-/blob/master/2025/CVE-2025-4979.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?497a88f6");
  script_set_attribute(attribute:"see_also", value:"https://gitlab.com/gitlab-org/gitlab/-/issues/524455");
  script_set_attribute(attribute:"solution", value:
"Upgrade to GitLab version 17.10.7, 17.11.3, 18.0.1 or later.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:M/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:H/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-2025-4979");

  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:"2025/05/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/05/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/05/22");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:gitlab:gitlab");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("gitlab_webui_detect.nbin", "gitlab_nix_installed.nbin");
  script_require_keys("installed_sw/GitLab");

  exit(0);
}

include('vcf.inc');

var app = 'GitLab';
var app_info = vcf::combined_get_app_info(app:app);

if (report_paranoia < 2 && max_index(app_info.parsed_version[0]) < 3 && (app_info.version =~ "^17\.(10|11)$" || app_info.version =~ "^18\.(0)$"))
  if (!empty_or_null(app_info.port))
    audit(AUDIT_POTENTIAL_VULN, app, app_info.version, app_info.port);
  else
    audit(AUDIT_POTENTIAL_VULN, app, app_info.version);

var constraints = [
  { 'fixed_version' : '17.10.7' },
  { 'min_version' : '17.11', 'fixed_version' : '17.11.3' },
  { 'min_version' : '18.0', 'fixed_version' : '18.0.1' }
];

vcf::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_WARNING
);