CVE-2021-41837

moderate-risk
Published 2022-02-03

An issue was discovered in AhciBusDxe in the kernel 5.0 through 5.5 in Insyde InsydeH2O. Because of an Untrusted Pointer Dereference that causes SMM memory corruption, an attacker may be able to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.

Do I need to act?

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0.06% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.2/10 High
LOCAL / LOW complexity

Affected Products (15)

Simatic Field Pg M6 Firmware
Simatic Ipc127E Firmware
Simatic Ipc227G Firmware
Simatic Ipc277G Firmware
Simatic Ipc327G Firmware
Simatic Ipc377G Firmware
Simatic Ipc627E Firmware
Simatic Ipc647E Firmware
Simatic Ipc677E Firmware
Simatic Ipc847E Firmware

Affected Vendors

Siemens Insyde

References (9)

Third Party Advisory https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
Third Party Advisory https://security.netapp.com/advisory/ntap-20220222-0003/
Vendor Advisory https://www.insyde.com/security-pledge
Vendor Advisory https://www.insyde.com/security-pledge/SA-2022024
Third Party Advisory https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
Third Party Advisory https://security.netapp.com/advisory/ntap-20220222-0003/
Vendor Advisory https://www.insyde.com/security-pledge
Vendor Advisory https://www.insyde.com/security-pledge/SA-2022024
https://www.kb.cert.org/vuls/id/796611
43
/ 100
moderate-risk
Severity 25/34 · High
Exploitability 0/34 · Minimal
Exposure 18/34 · Moderate