CVE-2021-33627
Insyde H2O EFI SMM Out-of-Bounds Read/Write Vulnerability
Description
An issue was discovered in Insyde InsydeH2O Kernel 5.0 before 05.09.11, 5.1 before 05.17.11, 5.2 before 05.27.11, 5.3 before 05.36.11, 5.4 before 05.44.11, and 5.5 before 05.52.11 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.
INFO
Published Date :
Feb. 3, 2022, 2:15 a.m.
Last Modified :
July 22, 2024, 5:15 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
6.0
Exploitability Score :
1.5
Affected Products
The following products are affected by CVE-2021-33627
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-33627.
| URL | Resource |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20220222-0002/ | Third Party Advisory |
| https://www.insyde.com/security-pledge | Vendor Advisory |
| https://www.insyde.com/security-pledge/SA-2022022 | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-33627 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-33627 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jul. 22, 2024
Action Type Old Value New Value Changed Description 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 An issue was discovered in Insyde InsydeH2O Kernel 5.0 before 05.09.11, 5.1 before 05.17.11, 5.2 before 05.27.11, 5.3 before 05.36.11, 5.4 before 05.44.11, and 5.5 before 05.52.11 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. -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Mar. 01, 2022
Action Type Old Value New Value Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20220222-0002/ No Types Assigned https://security.netapp.com/advisory/ntap-20220222-0002/ Third Party Advisory Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_field_pg_m5:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_field_pg_m6:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc127e_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc127e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc227g_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc227g:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc277g_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc277g:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc327g_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc327g:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc377g_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc377g:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc427e_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc427e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc477e_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc477e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc627e_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc627e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc647e_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc647e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc677e_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc677e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_ipc847e_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_ipc847e:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_itp1000_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_itp1000:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 24, 2022
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20220222-0002/ [No Types Assigned] Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf [No Types Assigned] -
Initial Analysis by [email protected]
Feb. 09, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Changed Reference Type https://www.insyde.com/security-pledge No Types Assigned https://www.insyde.com/security-pledge Vendor Advisory Changed Reference Type https://www.insyde.com/security-pledge/SA-2022022 No Types Assigned https://www.insyde.com/security-pledge/SA-2022022 Vendor Advisory Added CWE NIST CWE-119 Added CPE Configuration OR *cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:* versions from (including) 5.0 up to (excluding) 5.08.29 Added CPE Configuration OR *cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:* versions from (including) 5.1 up to (excluding) 5.16.29 Added CPE Configuration OR *cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:* versions from (including) 5.2 up to (excluding) 5.26.29 Added CPE Configuration OR *cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:* versions from (including) 5.3 up to (excluding) 5.35.29 -
CVE Modified by [email protected]
Feb. 09, 2022
Action Type Old Value New Value Changed Description A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(CommBuffer). This can be used by an attacker to corrupt data in SMRAM memory and even lead to arbitrary code execution. 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 Added Reference https://www.insyde.com/security-pledge/SA-2022022 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-33627 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-33627
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} 0.01%
score
0.18206
percentile