SB2023011714 - Spectre-BHB vulnerability in Trusted Firmware-A
Published: January 17, 2023
Security Bulletin ID
SB2023011714
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Processor optimization removal or modification of security-critical code (CVE-ID: CVE-2022-23960)
The vulnerability allows a local user to obtain potentially sensitive information.
The vulnerability exists due to improper restrictions of cache speculation. A local user can leverage the shared branch history in the Branch History Buffer (BHB) to influence mispredicted branches and gain access to sensitive information.
The vulnerability was dubbed Spectre-BHB.
Remediation
Install update from vendor's website.