Vulnerability in Insyde Insydeh2o
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 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.)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (28.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000
Affected products
Weakness classification (CWE)
References
- www.insyde.com/security-pledge (Vendor Advisory)
- www.insyde.com/security-pledge/SA-2022031 (Vendor Advisory)
- binarly.io/advisories/BRLY-2022-022/index.html (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-35408?
- CVE-2022-35408 is a high-severity vulnerability in Insyde Insydeh2o, classified under Write-what-where Condition. CVSS score: 8.2/10. Published 2022-09-22.
- How severe is CVE-2022-35408?
- High severity. CVSS v3 base score is 8.2 out of 10.