Apache HTTP Server mod_session_crypto Vulnerability (Dec 2016) - Linux

# 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:apache:http_server";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.147045");
  script_version("2021-11-01T14:03:43+0000");
  script_tag(name:"last_modification", value:"2021-11-01 14:03:43 +0000 (Mon, 01 Nov 2021)");
  script_tag(name:"creation_date", value:"2021-11-01 03:02:09 +0000 (Mon, 01 Nov 2021)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-06-06 11:15:00 +0000 (Sun, 06 Jun 2021)");

  script_cve_id("CVE-2016-0736");

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

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

  script_name("Apache HTTP Server mod_session_crypto Vulnerability (Dec 2016) - Linux");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("Web Servers");
  script_dependencies("gb_apache_http_server_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("apache/http_server/detected", "Host/runs_unixoide");

  script_tag(name:"summary", value:"Apache HTTP Server is prone to a vulnerability in mod_session_crypto.");

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

  script_tag(name:"insight", value:"mod_sessioncrypto is encrypting its data/cookie using the
  configured ciphers with possibly either CBC or ECB modes of operation (AES256-CBC by default),
  hence no selectable or builtin authenticated encryption. This makes it vulnerable to padding
  oracle attacks, particularly with CBC. An authentication tag (SipHash MAC) is now added to
  prevent such attacks.");

  script_tag(name:"affected", value:"Apache HTTP Server version 2.4.1 through 2.4.23.");

  script_tag(name:"solution", value:"Update to version 2.4.25 or later.");

  script_xref(name:"URL", value:"https://httpd.apache.org/security/vulnerabilities_24.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, version_regex: "^[0-9]+\.[0-9]+\.[0-9]+"))
  exit(0);

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

if (version_in_range(version: version, test_version: "2.4.1", test_version2: "2.4.23")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2.4.25", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);