Buffer overflow in Insyde Insydeh2o
CVE-2021-33625
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (24.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.5% 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: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.insyde.com/security-pledge (Vendor Advisory)
- www.insyde.com/security-pledge/SA-2022014 (Vendor Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf (Third Party Advisory)
- security.netapp.com/advisory/ntap-20220222-0004/ (Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2021-33625?
- CVE-2021-33625 is a high-severity vulnerability in Insyde Insydeh2o, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2022-02-03.
- How severe is CVE-2021-33625?
- High severity. CVSS v3 base score is 7.5 out of 10.