Dovecot 2.3.0 - 2.3.14 Information Disclosure Vulnerability

# Copyright (C) 2021 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.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

CPE = "cpe:/a:dovecot:dovecot";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.117515");
  script_version("2021-08-17T14:01:00+0000");
  script_tag(name:"last_modification", value:"2021-08-17 14:01:00 +0000 (Tue, 17 Aug 2021)");
  script_tag(name:"creation_date", value:"2021-06-28 11:44:06 +0000 (Mon, 28 Jun 2021)");
  script_tag(name:"cvss_base", value:"5.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-07-18 06:15:00 +0000 (Sun, 18 Jul 2021)");

  script_cve_id("CVE-2021-33515");

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

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

  script_name("Dovecot 2.3.0 - 2.3.14 Information Disclosure Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 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 information disclosure vulnerability.");

  script_tag(name:"insight", value:"On-path attacker could inject plaintext commands before STARTTLS
  negotiation that would be executed after STARTTLS finished with the client. Only the SMTP
  submission service is affected.");

  script_tag(name:"impact", value:"Attacker can potentially steal user credentials and mails. The
  attacker needs to have sending permissions on the submission server (a valid username and password).");

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

  script_tag(name:"affected", value:"Dovecot version 2.3.0 through- 2.3.14.");

  script_tag(name:"solution", value:"Update to version 2.3.14.1 or later.");

  script_xref(name:"URL", value:"https://dovecot.org/pipermail/dovecot-news/2021-June/000462.html");
  script_xref(name:"URL", value:"https://dovecot.org/pipermail/dovecot-news/2021-June/000459.html");

  exit(0);
}

include("version_func.inc");
include("host_details.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_in_range(version: version, test_version: "2.3.0", test_version2: "2.3.14")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2.3.14.1", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);