Home/CVE/An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. The SMI handler for the FwBlockServiceSmm drive
CVE

CVE-2022-35894

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. The SMI handler for the FwBlockServiceSmm drive

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. The SMI handler for the FwBlockServiceSmm driver uses an untrusted pointer as the location to copy data to an attacker-specified buffer, leading to information disclosure.

MEDIUM · CVSS 6 EPSS 0.00081
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-401Missing Release of Memory after Effective Lifetime
CWE-401Missing Release of Memory after Effective Lifetime
▤

Affected Products & Versions

6
insyde insydeh2o>= 5.0 and < 05.09.37
insyde insydeh2o>= 5.1 and < 5.17.37
insyde insydeh2o>= 5.2 and < 05.27.29
insyde insydeh2o>= 5.3 and < 05.36.29
insyde insydeh2o>= 5.4 and < 05.44.29
insyde insydeh2o>= 5.5 and < 05.52.29
⚠

Public Exploits & PoCs

1
pocbinarly.io · index.htmlbinarly.io
▣

Scoring & Timeline

6
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Sep 2022 · 06:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
siemens-csafSSA-957369
cisa-csafcisa-csaf-csaf_files-OT-white-2023-icsa-23-257-04
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.insyde.com/security-pledgeVendor Advisory
https://www.insyde.com/security-pledge/SA-2022030Vendor Advisory
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