CVE-2020-5953

7.5 HIGH
Published: February 03, 2022 Modified: November 04, 2025
View on NVD

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).

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
Source: cve@mitre.org
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220222-0005/
Source: cve@mitre.org
Third Party Advisory
https://www.insyde.com/products
Source: cve@mitre.org
Product Vendor Advisory
https://www.insyde.com/security-pledge
Source: cve@mitre.org
Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220222-0005/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.insyde.com/products
Source: af854a3a-2127-422b-91ae-364da2661108
Product Vendor Advisory
https://www.insyde.com/security-pledge
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://www.kb.cert.org/vuls/id/796611
Source: af854a3a-2127-422b-91ae-364da2661108

9 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.3%
52th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

insyde siemens