CVE-2021-33625

moderate-risk
Published 2022-02-03

An issue was discovered in Kernel 5.x in Insyde InsydeH2O, affecting HddPassword. Software SMI services that use the Communicate() function of the EFI_SMM_COMMUNICATION_PROTOCOL do not check whether the address of the buffer is valid, which allows use of SMRAM, MMIO, or OS kernel addresses.

Do I need to act?

-
0.06% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
LOCAL / HIGH complexity

Affected Products (18)

Ruggedcom Ape1808 Firmware
Simatic Ipc127E Firmware
Simatic Ipc277G Firmware
Simatic Ipc227G Firmware
Simatic Ipc327G Firmware
Simatic Ipc377G Firmware
Simatic Ipc477E Pro Firmware
Simatic Ipc627E Firmware
Simatic Ipc647E Firmware
Simatic Ipc677E Firmware
Simatic Ipc847E Firmware
Simatic Field Pg M6 Firmware

Affected Vendors

Siemens Insyde Netapp

References (9)

Third Party Advisory https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
Third Party Advisory https://security.netapp.com/advisory/ntap-20220222-0004/
Vendor Advisory https://www.insyde.com/security-pledge
Vendor Advisory https://www.insyde.com/security-pledge/SA-2022014
Third Party Advisory https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
Third Party Advisory https://security.netapp.com/advisory/ntap-20220222-0004/
Vendor Advisory https://www.insyde.com/security-pledge
Vendor Advisory https://www.insyde.com/security-pledge/SA-2022014
https://www.kb.cert.org/vuls/id/796611
39
/ 100
moderate-risk
Severity 20/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 19/34 · Moderate