Vulnerability Description
An issue was discovered in SdHostDriver in the kernel 5.0 through 5.5 in Insyde InsydeH2O. There is an SMM callout that allows an attacker to access the System Management Mode and execute arbitrary code. This occurs because of a Numeric Range Comparison Without a Minimum Check.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Insyde | Insydeh2O | >= 5.1, < 5.16.42 |
| Siemens | Simatic Field Pg M5 Firmware | All versions |
| Siemens | Simatic Field Pg M5 | - |
| Siemens | Simatic Field Pg M6 Firmware | All versions |
| Siemens | Simatic Field Pg M6 | - |
| Siemens | Simatic Ipc127E Firmware | All versions |
| Siemens | Simatic Ipc127E | - |
| Siemens | Simatic Ipc227G Firmware | All versions |
| Siemens | Simatic Ipc227G | - |
| Siemens | Simatic Ipc277G Firmware | All versions |
| Siemens | Simatic Ipc277G | - |
| Siemens | Simatic Ipc327G Firmware | All versions |
| Siemens | Simatic Ipc327G | - |
| Siemens | Simatic Ipc377G Firmware | All versions |
| Siemens | Simatic Ipc377G | - |
| Siemens | Simatic Ipc427E Firmware | All versions |
| Siemens | Simatic Ipc427E | - |
| Siemens | Simatic Ipc477E Firmware | All versions |
| Siemens | Simatic Ipc477E | - |
| Siemens | Simatic Ipc627E Firmware | All versions |
Related Weaknesses (CWE)
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfThird Party Advisory
- https://security.netapp.com/advisory/ntap-20220222-0001/Third Party Advisory
- https://www.insyde.com/security-pledgeVendor Advisory
- https://www.insyde.com/security-pledge/SA-2022023Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfThird Party Advisory
- https://security.netapp.com/advisory/ntap-20220222-0001/Third Party Advisory
- https://www.insyde.com/security-pledgeVendor Advisory
- https://www.insyde.com/security-pledge/SA-2022023Vendor Advisory
- https://www.kb.cert.org/vuls/id/796611
FAQ
What is CVE-2021-41838?
CVE-2021-41838 is a vulnerability with a CVSS score of 8.2 (HIGH). An issue was discovered in SdHostDriver in the kernel 5.0 through 5.5 in Insyde InsydeH2O. There is an SMM callout that allows an attacker to access the System Management Mode and execute arbitrary co...
How severe is CVE-2021-41838?
CVE-2021-41838 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-41838?
Check the references section above for vendor advisories and patch information. Affected products include: Insyde Insydeh2O, Siemens Simatic Field Pg M5 Firmware, Siemens Simatic Field Pg M5, Siemens Simatic Field Pg M6 Firmware, Siemens Simatic Field Pg M6.