Apache Solr 6.6.x < 6.6.7 / 7.x < 7.7.4 / 8.x < 8.6.3 Authentication Bypass (CVE-2020-13957)

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

include('compat.inc');

if (description)
{
  script_id(181480);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/18");

  script_cve_id("CVE-2020-13957");

  script_name(english:"Apache Solr 6.6.x < 6.6.7 / 7.x < 7.7.4 / 8.x < 8.6.3 Authentication Bypass (CVE-2020-13957)");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a Java application that is affected by an authentication bypass vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Apache Solr running on the remote host is 6.6.x prior to 6.6.7, or 7.x prior to 7.7.4, or 8.x prior to
8.6.3. It is, therefore, affected by an authentication bypass vulnerability. Apache Solr prevents some features 
considered dangerous (which could be used for remote code execution) to be configured in a ConfigSet that's uploaded via
API without authentication/authorization. The checks in place to prevent such features can be circumvented by using a
combination of UPLOAD/CREATE actions.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"http://lucene.apache.org/solr/news.html");
  # https://solr.apache.org/security.html#cve-2020-13957-the-checks-added-to-unauthenticated-configset-uploads-in-apache-solr-can-be-circumvented
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?78ad5169");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apache Solr version 8.6.3 or later, or apply any of the mitigations provided in the vendor's advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-13957");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:"CANVAS");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/10/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/10/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/15");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apache:solr");
  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("solr_detect.nbin");
  script_require_keys("installed_sw/Apache Solr");

  exit(0);
}

include('vcf.inc');

var app = 'Apache Solr';

var app_info = vcf::combined_get_app_info(app:app);
vcf::check_granularity(app_info:app_info, sig_segments:3);

var constraints = [
  {'min_version': '6.6.0', 'max_version': '6.6.6', 'fixed_version': '8.6.3'},
  {'min_version': '7.0.0', 'max_version': '7.7.3', 'fixed_version': '8.6.3'},
  {'min_version': '8.0.0', 'fixed_version': '8.6.3'}
];

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