9.8
CRITICAL
CVE-2020-5955
"InsydeH2O Int15MicrocodeSmm Privilege Escalation Vulnerability"
Description

An issue was discovered in Int15MicrocodeSmm in Insyde InsydeH2O before 2021-10-14 on Intel client chipsets. A caller may be able to escalate privileges.

INFO

Published Date :

Nov. 3, 2021, 1:15 a.m.

Last Modified :

July 12, 2022, 5:42 p.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2020-5955 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.

ID Vendor Product Action
1 Insyde insydeh2o_uefi_bios
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-2020-5955.

URL Resource
https://security.netapp.com/advisory/ntap-20220223-0003/ Third Party Advisory
https://www.insyde.com/products Product Vendor Advisory
https://www.insyde.com/security-pledge/SA-2021002 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-2020-5955 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-5955 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
  • CWE Remap by [email protected]

    Jul. 12, 2022

    Action Type Old Value New Value
    Changed CWE CWE-269 NVD-CWE-noinfo
  • Modified Analysis by [email protected]

    Apr. 12, 2022

    Action Type Old Value New Value
    Changed Reference Type https://security.netapp.com/advisory/ntap-20220223-0003/ No Types Assigned https://security.netapp.com/advisory/ntap-20220223-0003/ Third Party Advisory
  • CVE Modified by [email protected]

    Feb. 24, 2022

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20220223-0003/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Nov. 10, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/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/SA-2021002 No Types Assigned https://www.insyde.com/security-pledge/SA-2021002 Vendor Advisory
    Added CWE NIST CWE-269
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.32.30.0001 OR cpe:2.3:h:intel:ice_lake:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.41.35.0001 OR cpe:2.3:h:intel:tiger_lake:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.42.11.0026 OR cpe:2.3:h:intel:whitley-sp:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.04.21.0068 OR cpe:2.3:h:intel:grantley-ep:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.42.09.0003 OR cpe:2.3:h:intel:elkhart_lake:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.21.51.0040 OR cpe:2.3:h:intel:purley-ep_refresh_neon_city:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.34.09.0030 OR cpe:2.3:h:intel:comet_lake_rvp:-:*:*:*:embedded:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.34.09.0030 OR cpe:2.3:h:intel:comet_lake_rvp:-:*:*:*:server:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.32.47.0001 OR cpe:2.3:h:intel:comet_lake:-:*:*:*:client:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.23.45.0023 OR cpe:2.3:h:intel:whiskey_lake_rvp:-:*:*:*:embedded:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.23.45.0023 OR cpe:2.3:h:intel:whiskey_lake_rvp:-:*:*:*:server:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.21.43.0001 OR cpe:2.3:h:intel:whiskey_lake:-:*:*:*:client:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.23.04.0045 OR cpe:2.3:h:intel:mehlow:-:*:*:*:embedded:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.23.04.0045 OR cpe:2.3:h:intel:mehlow-r:-:*:*:*:embedded:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.23.04.0045 OR cpe:2.3:h:intel:mehlow-r:-:*:*:*:server:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.23.04.0045 OR cpe:2.3:h:intel:mehlow:-:*:*:*:server:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.21.43.0001 OR cpe:2.3:h:intel:coffee_lake:-:*:*:*:client:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.21.43.0001 OR cpe:2.3:h:intel:cannon_lake:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.11.26.0015 OR cpe:2.3:h:intel:kaby_lake_mrd:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.12.09.0075 OR cpe:2.3:h:intel:greenlow:-:*:*:*:embedded:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.12.09.0075 OR cpe:2.3:h:intel:greenlow-r:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.12.09.0075 OR cpe:2.3:h:intel:greenlow:-:*:*:*:server:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.12.09.0075 OR cpe:2.3:h:intel:greenlow-r:-:*:*:*:embedded:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.10.48.0001 OR cpe:2.3:h:intel:kaby_lake:-:*:*:*:client:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.05.39.0001 OR cpe:2.3:h:intel:skylake_mrd:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.04.15.0001 OR cpe:2.3:h:intel:skylake:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.23.27.0001 OR cpe:2.3:h:intel:coffee_lake:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:insyde:insydeh2o_uefi_bios:*:*:*:*:*:*:*:* versions up to (excluding) 05.23.27.0001 OR cpe:2.3:h:intel:whiskey_lake:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-5955 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-2020-5955 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.23 }} 0.02%

score

0.61781

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability