CVE-2022-40250: Stack overflow vulnerability in SMI handler on SmmSmbiosElog.
First published: Thu Aug 11 2022(Updated: )
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.
Credit: cret@cert.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| 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 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2022-40250?
The severity of CVE-2022-40250 is high with a severity value of 8.8.
How can an attacker exploit CVE-2022-40250?
An attacker can exploit CVE-2022-40250 to elevate privileges from ring 0 to ring -2 and execute arbitrary code in System Management Mode (SMM), which is more privileged than the operating system.
Which software versions are affected by CVE-2022-40250?
CVE-2022-40250 affects Intel Nuc M15 Laptop Kit Lapbc510 Firmware version bc0074 and Intel Nuc M15 Laptop Kit Lapbc710 Firmware version bc0074.
How can I fix CVE-2022-40250?
To fix CVE-2022-40250, it is recommended to apply the necessary firmware updates provided by Intel.
Where can I find more information about CVE-2022-40250?
More information about CVE-2022-40250 can be found on the websites of AMI Security Center, Binarly, and Intel Security Center.
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- vendor/intel
- canonical/intel nuc m15 laptop kit lapbc510 firmware
- version/intel nuc m15 laptop kit lapbc510 firmware/bc0074
- canonical/intel nuc m15 laptop kit lapbc510
- canonical/intel nuc m15 laptop kit lapbc710 firmware
- version/intel nuc m15 laptop kit lapbc710 firmware/bc0074
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- vendor/ami
- canonical/ami aptio v
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