Extreme ExtremeXOS DROWN Vulnerability (VN-2016-004)

# SPDX-FileCopyrightText: 2016 Greenbone AG
# 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-only

CPE = "cpe:/o:extremenetworks:exos";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106428");
  script_version("2023-12-13T05:05:23+0000");
  script_tag(name:"last_modification", value:"2023-12-13 05:05:23 +0000 (Wed, 13 Dec 2023)");
  script_tag(name:"creation_date", value:"2016-11-29 08:20:28 +0700 (Tue, 29 Nov 2016)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/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:"2018-11-30 21:31:00 +0000 (Fri, 30 Nov 2018)");

  script_cve_id("CVE-2016-0800");

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

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

  script_name("Extreme ExtremeXOS DROWN Vulnerability (VN-2016-004)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("General");
  script_dependencies("gb_extremeos_consolidation.nasl");
  script_mandatory_keys("extreme/exos/detected");

  script_tag(name:"summary", value:"Extreme ExtremeXOS is prone to the OpenSSL 'DROWN'
  vulnerability.");

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

  script_tag(name:"insight", value:"The SSLv2 protocol requires a server to send a ServerVerify
  message before establishing that a client possesses certain plaintext RSA data, which makes it
  easier for remote attackers to decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA
  padding oracle, aka a 'DROWN' attack.

  All SSLv2 ciphers are disabled, but SSLv2 protocol is enabled on EXOS. Since EXOS is vulnerable
  to CVE-2015-3197, SSLv2 ciphers can still be negotiated, which renders the switch vulnerable.");

  script_tag(name:"impact", value:"Cross-protocol attack that could lead to decryption of TLS
  sessions.");

  script_tag(name:"affected", value:"Extreme ExtremeXOS prior to version 16.2.1 or 21.1.2.");

  script_tag(name:"solution", value:"Update to version 16.2.1, 21.1.2, 22.1.1 or later.");

  script_xref(name:"URL", value:"https://gtacknowledge.extremenetworks.com/articles/Vulnerability_Notice/VN-2016-004");

  exit(0);
}

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

if (!version = get_app_version(cpe: CPE, nofork: TRUE))
  exit(0);

if (version_is_less(version: version, test_version: "16.2.1")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "16.2.1");
  security_message(port: 0, data: report);
  exit(0);
}

if (version =~ "^21\.1\.1") {
  report = report_fixed_ver(installed_version: version, fixed_version: "21.1.2");
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);