SB2021061627 - Inclusion of Functionality from Untrusted Control Sphere in Insyde InsydeH2O
Published: June 16, 2021 Updated: February 3, 2022
Security Bulletin ID
SB2021061627
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Inclusion of Functionality from Untrusted Control Sphere (CVE-ID: CVE-2020-27339)
CWE-ID: CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper usage of Insyde firmware’s SMM services in the handler for IDE devices. A local administrator can gain escalated privileges or access to privileged information.
Remediation
Install update from vendor's website.