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
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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
95.4%
The version of OpenSSL installed on the remote host is prior to 1.1.1m. It is, therefore, affected by a vulnerability as referenced in the 1.1.1m advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(157228);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/07");
script_cve_id("CVE-2021-4160");
script_name(english:"OpenSSL 1.1.1 < 1.1.1m Vulnerability");
script_set_attribute(attribute:"synopsis", value:
"The remote service is affected by a vulnerability.");
script_set_attribute(attribute:"description", value:
"The version of OpenSSL installed on the remote host is prior to 1.1.1m. It is, therefore, affected by a vulnerability as
referenced in the 1.1.1m advisory.
- There is a carry propagation bug in the MIPS32 and MIPS64 squaring procedure. Many EC algorithms are
affected, including some of the TLS 1.3 default curves. Impact was not analyzed in detail, because the
pre-requisites for attack are considered unlikely and include reusing private keys. Analysis suggests that
attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not
believed likely. Attacks against DH are considered just feasible (although very difficult) because most of
the work necessary to deduce information about a private key may be performed offline. The amount of
resources required for such an attack would be significant. However, for an attack on TLS to be
meaningful, the server would have to share the DH private key among multiple clients, which is no longer
an option since CVE-2016-0701. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0.0. It was
addressed in the releases of 1.1.1m and 3.0.1 on the 15th of December 2021. For the 1.0.2 release it is
addressed in git commit 6fc1aaaf3 that is available to premium support customers only. It will be made
available in 1.0.2zc when it is released. The issue only affects OpenSSL on MIPS platforms. Fixed in
OpenSSL 3.0.1 (Affected 3.0.0). Fixed in OpenSSL 1.1.1m (Affected 1.1.1-1.1.1l). Fixed in OpenSSL 1.0.2zc-
dev (Affected 1.0.2-1.0.2zb). (CVE-2021-4160)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
# https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=e9e726506cd2a3fd9c0f12daf8cc1fe934c7dddb
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?da5b5058");
script_set_attribute(attribute:"see_also", value:"https://www.cve.org/CVERecord?id=CVE-2021-4160");
script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/news/secadv/20220128.txt");
script_set_attribute(attribute:"solution", value:
"Upgrade to OpenSSL version 1.1.1m or later.");
script_set_attribute(attribute:"agent", value:"all");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-4160");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2022/01/28");
script_set_attribute(attribute:"patch_publication_date", value:"2022/01/28");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/01/28");
script_set_attribute(attribute:"plugin_type", value:"combined");
script_set_attribute(attribute:"cpe", value:"cpe:/a:openssl:openssl");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Web Servers");
script_copyright(english:"This script is Copyright (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("openssl_version.nasl", "openssl_nix_installed.nbin", "openssl_win_installed.nbin");
script_require_keys("installed_sw/OpenSSL");
exit(0);
}
include('vcf.inc');
include('vcf_extras_openssl.inc');
var app_info = vcf::combined_get_app_info(app:'OpenSSL');
vcf::check_all_backporting(app_info:app_info);
var constraints = [
{ 'min_version' : '1.1.1', 'fixed_version' : '1.1.1m' }
];
vcf::openssl::check_version_and_report(
app_info:app_info,
constraints:constraints,
severity:SECURITY_WARNING
);
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
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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
95.4%