Apache 2.4.x >= 2.4.7 / < 2.4.52 Forward Proxy DoS / SSRF

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(156255);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/22");

  script_cve_id("CVE-2021-44224", "CVE-2021-44790");
  script_xref(name:"IAVA", value:"2021-A-0604-S");

  script_name(english:"Apache 2.4.x >= 2.4.7 / < 2.4.52 Forward Proxy DoS / SSRF");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server is affected by a denial of service or server-side request forgery vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Apache httpd installed on the remote host is equal to or greater than 2.4.7 and prior to 2.4.52.
It is, therefore, affected by a flaw related to acting as a forward proxy.

A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL
pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for
requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery).

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:"solution", value:
"Upgrade to Apache version 2.4.52 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  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-2021-44790");

  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:"2021/11/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/12/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/12/23");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apache:httpd");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apache:http_server");
  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:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("apache_http_version.nasl", "apache_http_server_nix_installed.nbin", "apache_httpd_win_installed.nbin");
  script_require_keys("installed_sw/Apache");

  exit(0);
}

include('vcf.inc');
include('vcf_extras.inc');

app_info = vcf::apache_http_server::combined_get_app_info(app:'Apache');

var constraints = [
  { 'min_version' : '2.4.7', 'max_version' : '2.4.51', 'fixed_version' : '2.4.52' }
];

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