Dovecot 2.0.x < 2.0.13 Authentication Bypass Vulnerability

# Copyright (C) 2020 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
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CPE = "cpe:/a:dovecot:dovecot";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.114172");
  script_version("2020-12-08T08:52:45+0000");
  script_tag(name:"last_modification", value:"2020-12-08 08:52:45 +0000 (Tue, 08 Dec 2020)");
  script_tag(name:"creation_date", value:"2020-01-03 10:08:21 +0100 (Fri, 03 Jan 2020)");
  script_tag(name:"cvss_base", value:"6.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:P/I:P/A:P");

  script_cve_id("CVE-2011-2166");

  script_tag(name:"qod_type", value:"remote_banner_unreliable");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Dovecot 2.0.x < 2.0.13 Authentication Bypass Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2020 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("gb_dovecot_consolidation.nasl");
  script_mandatory_keys("dovecot/detected");

  script_tag(name:"summary", value:"Dovecot is prone to an authentication bypass vulnerability.");

  script_tag(name:"insight", value:"Script-login does not follow the user and group configuration
  settings, which might allow remote authenticated users to bypass intended access restrictions
  by leveraging a script.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"affected", value:"Dovecot versions 2.0.x before 2.0.13.");

  script_tag(name:"solution", value:"Update to version 2.0.13 or later.");

  script_xref(name:"URL", value:"https://dovecot.org/pipermail/dovecot/2011-May/059085.html");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if (isnull(port = get_app_port(cpe: CPE)))
  exit(0);

if (!infos = get_app_version_and_location(cpe: CPE, port: port, exit_no_version: TRUE))
  exit(0);

version = infos["version"];
location = infos["location"];

if (version_is_greater_equal(version: version, test_version: "2.0.0") &&
    version_is_less(version: version, test_version: "2.0.13")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2.0.13", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);