High severity · published Sep 22, 2022
CVE-2022-35408
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5
8.2
CVSS
0.4%
EPSS
No
On KEV
Description
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.)
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IN
Insydeh2o · Insyde
5.1 before 5.17.38; 5.2 before 05.27.28; 5.3 before 05.36.28; 5.4 before 05.44.28; 5.5 before 05.52.28; 5.0 before 05.09.38 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-35408
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-35408
Exploit
https://binarly.io/advisories/BRLY-2022-022/index.html
Vendor Advisory
https://www.insyde.com/security-pledge
Vendor Advisory
https://www.insyde.com/security-pledge/SA-2022031
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