CVE-2023-47252: kernel Memory Corruption — Fix

Description

An issue was discovered in PnpSmm in Insyde InsydeH2O with kernel 5.0 through 5.6. There is a possible out-of-bounds access in the SMM communication buffer, leading to tampering. The PNP-related SMI sub-functions do not verify data size before getting it from the communication buffer, which could lead to possible circumstances where the data immediately following the command buffer could be destroyed with a fixed value. This is fixed in kernel 5.2 v05.28.45, kernel 5.3 v05.37.45, kernel 5.4 v05.45.45, kernel 5.5 v05.53.45, and kernel 5.6 v05.60.45.

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CVSS v3.1 Score

6.3

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
insyde	kernel	5.2 — 5.28.45
insyde	kernel	5.3 — 5.37.45
insyde	kernel	5.4 — 5.45.45
insyde	kernel	5.5 — 5.53.45
insyde	kernel	5.6 — 5.60.45

References

Advisories & Patches

https://www.insyde.com/security-pledge/SA-2023067 https://www.insyde.com/security-pledge/SA-2023067

Frequently Asked Questions

What is CVE-2023-47252? +

An issue was discovered in PnpSmm in Insyde InsydeH2O with kernel 5.0 through 5.6. There is a possible out-of-bounds access in the SMM communication buffer, leading to tampering. The PNP-related SMI sub-functions do not verify data size before getting it from the communication buffer, which could lead to possible circumstances where the data immediately following the command buffer could be destroyed with a fixed value. This is fixed in kernel 5.2 v05.28.45, kernel 5.3 v05.37.45, kernel 5.4 v05.45.45, kernel 5.5 v05.53.45, and kernel 5.6 v05.60.45. It has a CVSS v3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2023-47252? +

CVE-2023-47252 has a CVSS v3.1 score of 6.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-47252? +

CVE-2023-47252 affects products from insyde, specifically: kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-47252? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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