GitLab 15.5 < 18.10.8 / 18.11 < 18.11.5 / 19.0 < 19.0.2 (CVE-2026-6552)

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

include('compat.inc');

if (description)
{
  script_id(320548);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/11");

  script_cve_id("CVE-2026-6552");

  script_name(english:"GitLab 15.5 < 18.10.8 / 18.11 < 18.11.5 / 19.0 < 19.0.2 (CVE-2026-6552)");

  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:

  - GitLab has remediated an issue in GitLab EE affecting all versions from 15.5 before 18.10.8, 18.11 before
    18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user
    with group Owner role to take over another group member's GitLab account due to improper authorization in
    the Group SAML identity management functionality. (CVE-2026-6552)

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/2026/CVE-2026-6552.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3dada457");
  script_set_attribute(attribute:"see_also", value:"https://gitlab.com/gitlab-org/gitlab/-/work_items/597295");
  script_set_attribute(attribute:"see_also", value:"https://hackerone.com/reports/3655189");
  # https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0f239441");
  script_set_attribute(attribute:"solution", value:
"Upgrade to GitLab version 18.10.8, 18.11.5, 19.0.2 or later.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:M/C:C/I:C/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:C/C:H/I:H/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-2026-6552");

  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:"2026/06/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/11");

  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:"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) 2026 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 =~ "^18\.(10|11)$" || app_info.version =~ "^19\.(0)$"))
  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 = [
  { 'min_version' : '15.5', 'fixed_version' : '18.10.8' },
  { 'min_version' : '18.11', 'fixed_version' : '18.11.5' },
  { 'min_version' : '19.0', 'fixed_version' : '19.0.2' }
];

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