Buffer overflow in Ami Aptio
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. 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
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Ami Aptio — versions 5.x
- Intel Nuc M15 Laptop Kit Lapbc510
- Intel Nuc M15 Laptop Kit Lapbc510 Firmware — versions 0072
- Intel Nuc M15 Laptop Kit Lapbc710
- Intel Nuc M15 Laptop Kit Lapbc710 Firmware — versions 0072
Weakness classification (CWE)
References
- www.ami.com/security-center/ (Vendor Advisory)
- www.binarly.io/advisories/BRLY-2022-014 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-40246?
- CVE-2022-40246 is a high-severity vulnerability in Ami Aptio, classified under Write-what-where Condition. CVSS score: 7.2/10. Published 2022-09-20.
- How severe is CVE-2022-40246?
- High severity. CVSS v3 base score is 7.2 out of 10.