CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS
Percentile
12.6%
An issue was discovered in SdHostDriver in Insyde InsydeH2O with kernel 5.1 before 05.16.25, 5.2 before 05.26.25, 5.3 before 05.35.25, 5.4 before 05.43.25, and 5.5 before 05.51.25. A vulnerability exists in the SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer (CommBufferData).
Insyde BIOS is typically used in RUGGEDCOM APE products and some SIMATIC devices. Please refer to the vendor advisory for a precise list of models concerned.
This plugin only works with Tenable.ot Please visit https://www.tenable.com/products/tenable-ot for more information.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
include('compat.inc');
if (description)
{
script_id(501701);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/27");
script_cve_id("CVE-2021-45971");
script_name(english:"Siemens InsydeH2O Out-of-bounds Write (CVE-2021-45971)");
script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
script_set_attribute(attribute:"description", value:
"An issue was discovered in SdHostDriver in Insyde InsydeH2O with
kernel 5.1 before 05.16.25, 5.2 before 05.26.25, 5.3 before 05.35.25,
5.4 before 05.43.25, and 5.5 before 05.51.25. A vulnerability exists
in the SMM (System Management Mode) branch that registers a SWSMI
handler that does not sufficiently check or validate the allocated
buffer pointer (CommBufferData).
Insyde BIOS is typically used in RUGGEDCOM APE products
and some SIMATIC devices. Please refer to the vendor advisory for a
precise list of models concerned.
This plugin only works with Tenable.ot
Please visit https://www.tenable.com/products/tenable-ot for more information.");
script_set_attribute(attribute:"see_also", value:"https://www.insyde.com/security-pledge");
script_set_attribute(attribute:"see_also", value:"https://security.netapp.com/advisory/ntap-20220216-0004/");
script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf");
script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-45971");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_cwe_id(787);
script_set_attribute(attribute:"vuln_publication_date", value:"2022/01/06");
script_set_attribute(attribute:"patch_publication_date", value:"2022/01/06");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/26");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/a:insyde:insydeh2o:5.1");
script_set_attribute(attribute:"cpe", value:"cpe:/a:insyde:insydeh2o:5.2");
script_set_attribute(attribute:"cpe", value:"cpe:/a:insyde:insydeh2o:5.3");
script_set_attribute(attribute:"cpe", value:"cpe:/a:insyde:insydeh2o:5.4");
script_set_attribute(attribute:"cpe", value:"cpe:/a:insyde:insydeh2o:5.5");
script_set_attribute(attribute:"generated_plugin", value:"former");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Tenable.ot");
script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("tenable_ot_api_integration.nasl");
script_require_keys("Tenable.ot/Siemens");
exit(0);
}
include('tenable_ot_cve_funcs.inc');
get_kb_item_or_exit('Tenable.ot/Siemens');
var asset = tenable_ot::assets::get(vendor:'Siemens');
var vuln_cpes = {
"cpe:/a:insyde:insydeh2o:5.1" :
{"versionEndExcluding" : "5.16.25", "versionStartIncluding" : "5.1", "family" : "APE1808"},
"cpe:/a:insyde:insydeh2o:5.2" :
{"versionEndExcluding" : "5.26.25", "versionStartIncluding" : "5.2", "family" : "APE1808"},
"cpe:/a:insyde:insydeh2o:5.3" :
{"versionEndExcluding" : "5.35.25", "versionStartIncluding" : "5.3", "family" : "APE1808"},
"cpe:/a:insyde:insydeh2o:5.4" :
{"versionEndExcluding" : "5.43.25", "versionStartIncluding" : "5.4", "family" : "APE1808"},
"cpe:/a:insyde:insydeh2o:5.5" :
{"versionEndExcluding" : "5.51.25", "versionStartIncluding" : "5.5", "family" : "APE1808"}
};
tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_HOLE);
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS
Percentile
12.6%