Vulnerability in Insyde Insydeh2o
CVE-2020-5953
A vulnerability exists in System Management Interrupt (SWSMI) handler of InsydeH2O UEFI Firmware code located in SWSMI handler that dereferences gRT (EFI_RUNTIME_SERVICES) pointer to call a GetVariable service, which is located outside of SMRAM. This can result in code execution in SMM (escalating privilege from ring 0 to ring -2).
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 (20.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.9% 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
- Insyde Insydeh2o — versions 5.12.09.0074, 5.23.04.0045, 5.23.45.0023
- Siemens Ruggedcom Ape1808
- Siemens Ruggedcom Ape1808 Firmware
- Siemens Simatic Field Pg M5
- Siemens Simatic Field Pg M5 Firmware
- Siemens Simatic Field Pg M6
- Siemens Simatic Field Pg M6 Firmware
- Siemens Simatic Ipc127e
- Siemens Simatic Ipc127e Firmware
- Siemens Simatic Ipc227g
References
- www.insyde.com/products (Product, Vendor Advisory)
- www.insyde.com/security-pledge (Vendor Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf (Third Party Advisory)
- security.netapp.com/advisory/ntap-20220222-0005/ (Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2020-5953?
- CVE-2020-5953 is a high-severity vulnerability in Insyde Insydeh2o. CVSS score: 7.5/10. Published 2022-02-03.
- How severe is CVE-2020-5953?
- High severity. CVSS v3 base score is 7.5 out of 10.