CVE-2021-33627

Description

An issue was discovered in Insyde InsydeH2O 5.x, affecting FwBlockServiceSmm. Software SMI services that use the Communicate() function of the EFISMMCOMMUNICATIONPROTOCOL do not check whether the address of the buffer is valid, which allows use of SMRAM, MMIO, or OS kernel addresses

Risk Information

Base Score

8.2

MODERATE

Vector

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

EPSS Score

Exploitation Probability

0.149

Associated Vulnerability

Vulnerability	OS Platform
Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability (CVE-2021-33627)	NCM

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234