CVSS2
Attack Vector
NETWORK
Attack Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:H/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
54.0%
An Insufficient Entropy in PRNG vulnerability in Fortinet FortiOS 6.2.1 and below for device not enable hardware TRNG token and models not support builtin TRNG seed allows attacker to theoretically recover the long term ECDSA secret in a TLS client with a RSA handshake and mutual ECDSA authentication via the help of flush+reload side channel attacks in FortiGate VM models only.
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(130209);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/09/16");
script_cve_id("CVE-2019-15703");
script_name(english:"FortiOS DRBG unsufficient entropy (FG-IR-19-186)");
script_summary(english:"Checks the version of FortiOS.");
script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by an information disclosure vulnerability.");
script_set_attribute(attribute:"description", value:
"An Insufficient Entropy in PRNG vulnerability in Fortinet FortiOS 6.2.1 and below for device not enable
hardware TRNG token and models not support builtin TRNG seed allows attacker to theoretically recover the
long term ECDSA secret in a TLS client with a RSA handshake and mutual ECDSA authentication via the help
of flush+reload side channel attacks in FortiGate VM models only.");
script_set_attribute(attribute:"see_also", value:"https://fortiguard.com/psirt/FG-IR-19-186");
script_set_attribute(attribute:"solution", value:
"Upgrade to Fortinet FortiOS version 6.2.1 or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:H/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:L/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-2019-15703");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/18");
script_set_attribute(attribute:"patch_publication_date", value:"2019/10/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/10/25");
script_set_attribute(attribute:"potential_vulnerability", value:"true");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:fortinet:fortios");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Firewalls");
script_copyright(english:"This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("fortinet_version.nbin");
script_require_keys("Host/Fortigate/model", "Host/Fortigate/version", "Settings/ParanoidReport");
exit(0);
}
include('audit.inc');
include('vcf.inc');
include('vcf_extras_fortios.inc');
if (report_paranoia < 2) audit(AUDIT_PARANOID);
app_name = 'FortiOS';
app_info = vcf::get_app_info(app:app_name, kb_ver:'Host/Fortigate/version');
vcf::fortios::verify_product_and_model(product_name:'FortiGate');
constraints = [
{ 'fixed_version' : '6.2.1' }
];
vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_NOTE);
CVSS2
Attack Vector
NETWORK
Attack Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:H/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
54.0%