GitLab 16.5 < 16.5.3 / 16.6 < 16.6.1 (CVE-2023-6396)

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

include('compat.inc');

if (description)
{
  script_id(186659);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/22");

  script_cve_id("CVE-2023-6396");
  script_xref(name:"IAVA", value:"2023-A-0666-S");

  script_name(english:"GitLab 16.5 < 16.5.3 / 16.6 < 16.6.1 (CVE-2023-6396)");

  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 reports: XSS and ReDoS in Markdown via Banzai pipeline of Jira Members with admin_group_member
    custom permission can add members with higher role Release Description visible in public projects despite
    release set as project members only through atom response Manipulate the repository content in the UI
    (CVE-2023-3401 bypass) External user can abuse policy bot to gain access to internal projects Client-side
    DOS via Mermaid Flowchart Developers can update pipeline schedules to use protected branches even if they
    don't have permission to merge Users can install Composer packages from public projects even when Package
    registry is turned off Unauthorized member can gain Allowed to push and merge access and affect integrity
    of protected branches Guest users can react (emojis) on confidential work items which they cant see in a
    project (CVE-2023-6396)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://about.gitlab.com/releases/2023/11/30/security-release-gitlab-16-6-1-released/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3a8f221a");
  # https://about.gitlab.com/releases/2023/11/30/security-release-gitlab-16-6-1-released/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3a8f221a");
  script_set_attribute(attribute:"solution", value:
"Upgrade to GitLab version 16.5.3, 16.6.1 or later.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/UI:N/S:U/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-2023-6396");

  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:"2023/11/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/11/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/12/07");

  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) 2023 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 =~ "^16\.(5|6)$")
  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' : '16.5', 'fixed_version' : '16.5.3' },
  { 'min_version' : '16.6', 'fixed_version' : '16.6.1' }
];

vcf::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_HOLE,
    flags:{'xss':TRUE}
);