Home/CVE/An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM callout vulnerability in the SMM driver
CVE

CVE-2022-35408

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM callout vulnerability in the SMM driver

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM callout vulnerability in the SMM driver in UsbLegacyControlSmm leads to possible arbitrary code execution in SMM and escalation of privileges. An attacker could overwrite the function pointers in the EFI_BOOT_SERVICES table before the USB SMI handler triggers.

(This is not exploitable from code running in the operating system.)

HIGH · CVSS 8.2 EPSS 0.00084
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-123Write-what-where Condition
▤

Affected Products & Versions

6
insyde insydeh2o>= 5.1 and < 5.17.38
insyde insydeh2o>= 5.2 and < 05.27.28
insyde insydeh2o>= 5.3 and < 05.36.28
insyde insydeh2o>= 5.4 and < 05.44.28
insyde insydeh2o>= 5.5 and < 05.52.28
insyde insydeh2o>= 5.0 and < 05.09.38
⚠

Public Exploits & PoCs

1
pocbinarly.io · index.htmlbinarly.io
▣

Scoring & Timeline

8.2
HIGH · 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 · 04:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

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-2022031Vendor Advisory
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