High severity · published Feb 15, 2023
CVE-2022-32471
An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5
7.0
CVSS
0.1%
EPSS
No
On KEV
Description
An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. The IhisiDxe driver uses the command buffer to pass input and output data. By modifying the command buffer contents with DMA after the input parameters have been checked but before they are used, the IHISI SMM code may be convinced to modify SMRAM or OS, leading to possible data corruption or escalation of privileges.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IN
Insydeh2o · Insyde
5.0 before 5.2.05.27.37; 5.3 before 5.3.05.36.37; 5.4 before 5.4.05.44.45; 5.5 before 5.5.05.52.45 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-32471
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-32471
Vendor Advisory
https://www.insyde.com/security-pledge
Vendor Advisory
https://www.insyde.com/security-pledge/SA-2023003
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