CVE-2020-5953
InsydeH2O UEFI Firmware SWSMI SMM Escalation Vulnerability
Description
A vulnerability exists in System Management Interrupt (SWSMI) handler of InsydeH2O UEFI Firmware code located in SWSMI handler that dereferences gRT (EFI_RUNTIME_SERVICES) pointer to call a GetVariable service, which is located outside of SMRAM. This can result in code execution in SMM (escalating privilege from ring 0 to ring -2).
INFO
Published Date :
Feb. 3, 2022, 1:15 a.m.
Last Modified :
April 12, 2022, 6:17 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
6.0
Exploitability Score :
0.8
Affected Products
The following products are affected by CVE-2020-5953
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-5953.
| URL | Resource |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20220222-0005/ | Third Party Advisory |
| https://www.insyde.com/products | Product Vendor Advisory |
| https://www.insyde.com/security-pledge | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-5953 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-5953 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Apr. 12, 2022
Action Type Old Value New Value Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20220222-0005/ No Types Assigned https://security.netapp.com/advisory/ntap-20220222-0005/ Third Party Advisory Added CPE Configuration AND OR *cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:ruggedcom_ape1808:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_field_pg_m6:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc127e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc127e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc227g_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc227g:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc277g_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc277g:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_itp1000_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_itp1000:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc477e_pro_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc477e_pro:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc627e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc627e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc647e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc647e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc677e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc677e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc847e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc847e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc327g_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc327g:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc377g_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc377g:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc427e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc427e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc477e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc477e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_field_pg_m5:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 24, 2022
Action Type Old Value New Value Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf [No Types Assigned] Added Reference https://security.netapp.com/advisory/ntap-20220222-0005/ [No Types Assigned] -
Initial Analysis by [email protected]
Feb. 09, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H Changed Reference Type https://www.insyde.com/products No Types Assigned https://www.insyde.com/products Product, Vendor Advisory Changed Reference Type https://www.insyde.com/security-pledge No Types Assigned https://www.insyde.com/security-pledge Vendor Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:insyde:insydeh2o:5.12.09.0074:*:*:*:*:*:*:* *cpe:2.3:a:insyde:insydeh2o:5.23.04.0045:*:*:*:*:*:*:* *cpe:2.3:a:insyde:insydeh2o:5.23.45.0023:*:*:*:*:*:*:* *cpe:2.3:a:insyde:insydeh2o:5.33.15.0034:*:*:*:*:*:*:* *cpe:2.3:a:insyde:insydeh2o:5.34.03.0029:*:*:*:*:*:*:* *cpe:2.3:a:insyde:insydeh2o:5.42.03.0010:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-5953 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-5953
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} 0.01%
score
0.18206
percentile