CVE-2021-33627: Buffer Overflow
First published: Thu Feb 03 2022(Updated: )
An issue was discovered in Insyde InsydeH2O 5.x, affecting FwBlockServiceSmm. 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
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Insyde InsydeH2O | >=5.0<5.08.29 | |
| Insyde InsydeH2O | >=5.1<5.16.29 | |
| Insyde InsydeH2O | >=5.2<5.26.29 | |
| Insyde InsydeH2O | >=5.3<5.35.29 | |
| Siemens Simatic Field Pg M5 Firmware | ||
| Siemens Simatic Field Pg M5 | ||
| Siemens Simatic Field Pg M6 Firmware | ||
| Siemens Simatic Field Pg M6 | ||
| Siemens Simatic Ipc127e Firmware | ||
| Siemens Simatic Ipc127e | ||
| Siemens Simatic Ipc227g Firmware | ||
| Siemens Simatic Ipc227g | ||
| Siemens Simatic Ipc277g Firmware | ||
| Siemens Simatic Ipc277g | ||
| Siemens Simatic Ipc327g Firmware | ||
| Siemens Simatic Ipc327g | ||
| Siemens Simatic Ipc377g Firmware | ||
| Siemens Simatic Ipc377g | ||
| Siemens Simatic Ipc427e Firmware | ||
| Siemens Simatic Ipc427e | ||
| Siemens Simatic Ipc477e Firmware | ||
| Siemens Simatic Ipc477e | ||
| Siemens Simatic Ipc627e Firmware | ||
| Siemens Simatic Ipc627e | ||
| Siemens Simatic Ipc647e Firmware | ||
| Siemens Simatic Ipc647e | ||
| Siemens Simatic Ipc677e Firmware | ||
| Siemens Simatic Ipc677e | ||
| Siemens Simatic Ipc847e Firmware | ||
| Siemens Simatic Ipc847e | ||
| Siemens Simatic Itp1000 Firmware | ||
| Siemens Simatic Itp1000 | ||
| All of | ||
| Siemens Simatic Field Pg M5 | ||
| Siemens Simatic Field Pg M5 Firmware | ||
| All of | ||
| Siemens Simatic Field Pg M6 | ||
| Siemens Simatic Field Pg M6 Firmware | ||
| All of | ||
| Siemens Simatic Ipc127e | ||
| Siemens Simatic Ipc127e Firmware | ||
| All of | ||
| Siemens Simatic Ipc227g | ||
| Siemens Simatic Ipc227g Firmware | ||
| All of | ||
| Siemens Simatic Ipc277g | ||
| Siemens Simatic Ipc277g Firmware | ||
| All of | ||
| Siemens Simatic Ipc327g | ||
| Siemens Simatic Ipc327g Firmware | ||
| All of | ||
| Siemens Simatic Ipc377g | ||
| Siemens Simatic Ipc377g Firmware | ||
| All of | ||
| Siemens Simatic Ipc427e Firmware | ||
| Siemens Simatic Ipc427e | ||
| All of | ||
| Siemens Simatic Ipc477e Firmware | ||
| Siemens Simatic Ipc477e | ||
| All of | ||
| Siemens Simatic Ipc627e Firmware | ||
| Siemens Simatic Ipc627e | ||
| All of | ||
| Siemens Simatic Ipc647e Firmware | ||
| Siemens Simatic Ipc647e | ||
| All of | ||
| Siemens Simatic Ipc677e Firmware | ||
| Siemens Simatic Ipc677e | ||
| All of | ||
| Siemens Simatic Ipc847e Firmware | ||
| Siemens Simatic Ipc847e | ||
| All of | ||
| Siemens Simatic Itp1000 Firmware | ||
| Siemens Simatic Itp1000 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-33627.
What is the severity level of CVE-2021-33627?
The severity level of CVE-2021-33627 is high with a CVSS score of 8.2.
What software is affected by CVE-2021-33627?
Insyde InsydeH2O 5.x and Siemens Simatic Field Pg M5 Firmware are affected by CVE-2021-33627.
How does CVE-2021-33627 impact the affected software?
CVE-2021-33627 allows an attacker to use SMRAM, MMIO, or OS kernel addresses through the Communicate() function of the EFI_SMM_COMMUNICATION_PROTOCOL.
Are there any available fixes for CVE-2021-33627?
For available fixes, please refer to the vendor's security advisory and security pledge.
- collector/nvd-index
- agent/references
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/last-modified-date
- agent/tags
- agent/description
- agent/first-publish-date
- agent/severity
- agent/author
- agent/event
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- vendor/insyde
- canonical/insyde insydeh2o
- version/insyde insydeh2o/5.0
- version/insyde insydeh2o/5.1
- version/insyde insydeh2o/5.2
- version/insyde insydeh2o/5.3
- vendor/siemens
- canonical/siemens simatic field pg m5 firmware
- canonical/siemens simatic field pg m5
- canonical/siemens simatic field pg m6 firmware
- canonical/siemens simatic field pg m6
- canonical/siemens simatic ipc127e firmware
- canonical/siemens simatic ipc127e
- canonical/siemens simatic ipc227g firmware
- canonical/siemens simatic ipc227g
- canonical/siemens simatic ipc277g firmware
- canonical/siemens simatic ipc277g
- canonical/siemens simatic ipc327g firmware
- canonical/siemens simatic ipc327g
- canonical/siemens simatic ipc377g firmware
- canonical/siemens simatic ipc377g
- canonical/siemens simatic ipc427e firmware
- canonical/siemens simatic ipc427e
- canonical/siemens simatic ipc477e firmware
- canonical/siemens simatic ipc477e
- canonical/siemens simatic ipc627e firmware
- canonical/siemens simatic ipc627e
- canonical/siemens simatic ipc647e firmware
- canonical/siemens simatic ipc647e
- canonical/siemens simatic ipc677e firmware
- canonical/siemens simatic ipc677e
- canonical/siemens simatic ipc847e firmware
- canonical/siemens simatic ipc847e
- canonical/siemens simatic itp1000 firmware
- canonical/siemens simatic itp1000