CVE-2022-40246
A potential attacker can write one byte by arbitrary address at the time of the PEI phase (only during S3 resume boot mode) and influence the subsequent boot stages.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A potential attacker can write one byte by arbitrary address at the time of the PEI phase (only during S3 resume boot mode) and influence the subsequent boot stages. This can lead to the mitigations bypassing, physical memory contents disclosure, discovery of any secrets from any Virtual Machines (VMs) and bypassing memory isolation and confidential computing boundaries. Additionally, an attacker can build a payload which can be injected into the SMRAM memory. This issue affects: Module name: SbPei SHA256: d827182e5f9b7a9ff0b9d3e232f7cfac43b5237e2681e11f005be627a49283a9 Module GUID: c1fbd624-27ea-40d1-aa48-94c3dc5c7e0d
- CVSS 3.1
- 7.2 HIGHCVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.47% probability · 40th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-123, CWE-787
- Affected
- intel/nuc m15 laptop kit lapbc510 firmware · intel/nuc m15 laptop kit lapbc710 firmware
- Source
- cret@cert.org
References
- https://www.ami.com/security-center/Vendor Advisory
- https://www.binarly.io/advisories/BRLY-2022-014Exploit, Third Party Advisory
- https://www.ami.com/security-center/Vendor Advisory
- https://www.binarly.io/advisories/BRLY-2022-014Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.