7.2 High
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
6.7 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
12.8%
In the kernel in Insyde InsydeH2O 5.x, certain SMM drivers did not correctly validate the CommBuffer and CommBufferSize parameters, allowing callers to corrupt either the firmware or the OS memory. The fixed versions for this issue in the AhciBusDxe, IdeBusDxe, NvmExpressDxe, SdHostDriverDxe, and SdMmcDeviceDxe drivers are 05.16.25, 05.26.25, 05.35.25, 05.43.25, and 05.51.25 (for Kernel 5.1 through 5.5).
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(501693);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/27");
script_cve_id("CVE-2020-27339");
script_name(english:"Siemens InsydeH2O Improper Input Validation (CVE-2020-27339)");
script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
script_set_attribute(attribute:"description", value:
"In the kernel in Insyde InsydeH2O 5.x, certain SMM drivers did not
correctly validate the CommBuffer and CommBufferSize parameters,
allowing callers to corrupt either the firmware or the OS memory. The
fixed versions for this issue in the AhciBusDxe, IdeBusDxe,
NvmExpressDxe, SdHostDriverDxe, and SdMmcDeviceDxe drivers are
05.16.25, 05.26.25, 05.35.25, 05.43.25, and 05.51.25 (for Kernel 5.1
through 5.5).
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/SA-2021001");
script_set_attribute(attribute:"see_also", value:"https://security.netapp.com/advisory/ntap-20220216-0005/");
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:U/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-2020-27339");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_cwe_id(20);
script_set_attribute(attribute:"vuln_publication_date", value:"2021/06/16");
script_set_attribute(attribute:"patch_publication_date", value:"2021/06/16");
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:/o:insyde:insydeh2o:5.1");
script_set_attribute(attribute:"cpe", value:"cpe:/o:insyde:insydeh2o:5.2");
script_set_attribute(attribute:"cpe", value:"cpe:/o:insyde:insydeh2o:5.3");
script_set_attribute(attribute:"cpe", value:"cpe:/o:insyde:insydeh2o:5.4");
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:/o:insyde:insydeh2o:5.3" :
{"versionEndExcluding" : "5.35.25", "versionStartIncluding" : "5.3", "family" : "APE1808"},
"cpe:/o:insyde:insydeh2o:5.2" :
{"versionEndExcluding" : "5.26.25", "versionStartIncluding" : "5.2", "family" : "APE1808"},
"cpe:/o:insyde:insydeh2o:5.1" :
{"versionEndExcluding" : "5.16.25", "versionStartIncluding" : "5.1", "family" : "APE1808"},
"cpe:/o:insyde:insydeh2o:5.4" :
{"versionEndExcluding" : "5.43.25", "versionStartIncluding" : "5.4", "family" : "APE1808"}
};
tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_HOLE);
7.2 High
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
6.7 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
12.8%