Webmin < 0.5 Brute Force Vulnerability

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(108534);
  script_version("1.4");
  script_cvs_date("Date: 2019/11/08");

  script_cve_id("CVE-1999-1074");
  script_bugtraq_id(98);

  script_name(english:"Webmin < 0.5 Brute Force Vulnerability");
  script_summary(english:"Checks version of Webmin.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server is affected by security issue which may allow
for brute force attacks.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, the Webmin install hosted on
the remote host is prior to version 0.5. It is, therefore, affected
by an issue which would allow attackers to more easily brute force
a password");
  script_set_attribute(attribute:"see_also", value:"https://www.securityfocus.com/bid/98");
  script_set_attribute(attribute:"see_also", value:"http://www.webmin.com/changes.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Webmin 0.5 or later.");
  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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");

  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:"1998/12/31");
  script_set_attribute(attribute:"patch_publication_date", value:"1998/12/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/22");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:webmin:webmin");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("webmin.nasl");
  script_require_keys("www/webmin", "Settings/ParanoidReport");
  script_require_ports("Services/www", 10000);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");

app = 'Webmin';
port = get_http_port(default:10000, embedded: TRUE);

get_kb_item_or_exit('www/'+port+'/webmin');
version = get_kb_item_or_exit('www/webmin/'+port+'/version', exit_code:1);
source = get_kb_item_or_exit('www/webmin/'+port+'/source', exit_code:1);

if (report_paranoia < 2) audit(AUDIT_PARANOID);

dir = "/";
install_url = build_url(port:port, qs:dir);

fix = "0.5";

if (ver_compare(ver:version, fix:fix, strict:FALSE) < 0)
{
  report =
    '\n  URL               : ' + install_url +
    '\n  Version Source    : ' + source +
    '\n  Installed version : ' + version +
    '\n  Fixed version     : ' + fix + '\n';

  security_report_v4(severity:SECURITY_HOLE, port:port, extra:report);
}
else audit(AUDIT_WEB_APP_NOT_AFFECTED, app, install_url, version);