Vulnerability Description
An attacker can exploit this vulnerability to elevate privileges from ring 0 to ring -2, execute arbitrary code in System Management Mode - an environment more privileged than operating system (OS) and completely isolated from it. Running arbitrary code in SMM additionally bypasses SMM-based SPI flash protections against modifications, which can help an attacker to install a firmware backdoor/implant into BIOS. Such a malicious firmware code in BIOS could persist across operating system re-installs. Additionally, this vulnerability potentially could be used by malicious actors to bypass security mechanisms provided by UEFI firmware (for example, Secure Boot and some types of memory isolation for hypervisors). This issue affects: Module name: SmmSmbiosElog SHA256: 3a8acb4f9bddccb19ec3b22b22ad97963711550f76b27b606461cd5073a93b59 Module GUID: 8e61fd6b-7a8b-404f-b83f-aa90a47cabdf This issue affects: AMI Aptio 5.x. This issue affects: AMI Aptio 5.x.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Intel | Nuc M15 Laptop Kit Lapbc510 Firmware | bc0074 |
| Intel | Nuc M15 Laptop Kit Lapbc510 | - |
| Intel | Nuc M15 Laptop Kit Lapbc710 Firmware | bc0074 |
| Intel | Nuc M15 Laptop Kit Lapbc710 | - |
| Ami | Aptio V | 5.0 |
Related Weaknesses (CWE)
References
- https://www.ami.com/security-center/Vendor Advisory
- https://www.binarly.io/advisories/BRLY-2022-016ExploitThird Party Advisory
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00712.Not ApplicableThird Party Advisory
- https://www.ami.com/security-center/Vendor Advisory
- https://www.binarly.io/advisories/BRLY-2022-016ExploitThird Party Advisory
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00712.Not ApplicableThird Party Advisory
FAQ
What is CVE-2022-40250?
CVE-2022-40250 is a vulnerability with a CVSS score of 8.8 (HIGH). An attacker can exploit this vulnerability to elevate privileges from ring 0 to ring -2, execute arbitrary code in System Management Mode - an environment more privileged than operating system (OS) an...
How severe is CVE-2022-40250?
CVE-2022-40250 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-40250?
Check the references section above for vendor advisories and patch information. Affected products include: Intel Nuc M15 Laptop Kit Lapbc510 Firmware, Intel Nuc M15 Laptop Kit Lapbc510, Intel Nuc M15 Laptop Kit Lapbc710 Firmware, Intel Nuc M15 Laptop Kit Lapbc710, Ami Aptio V.