4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
7.4 High
AI Score
Confidence
High
0.952 High
EPSS
Percentile
99.4%
Extreme ExtremeXOS is prone to the OpenSSL
# 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);
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
7.4 High
AI Score
Confidence
High
0.952 High
EPSS
Percentile
99.4%