Insyde InsydeH2O SMM allocation of resources

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Insyde InsydeH2O. It has been declared as problematic. Impacted is an unknown function of the component SMM. Executing a manipulation can lead to allocation of resources. This vulnerability is tracked as CVE-2021-33627. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Insyde InsydeH2O (version now known). This vulnerability affects some unknown processing of the component SMM. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed 02/03/2022. The advisory is available at insyde.com. This vulnerability was named CVE-2021-33627 since 05/28/2021. The technical details are unknown and an exploit is not available.

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.2
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/28/2021 🔍
02/03/2022 +251 days 🔍
02/03/2022 +0 days 🔍
11/04/2025 +1370 days 🔍

Sourcesinfo

Advisory: insyde.com
Status: Confirmed

CVE: CVE-2021-33627 (🔍)
GCVE (CVE): GCVE-0-2021-33627
GCVE (VulDB): GCVE-100-192142

Entryinfo

Created: 02/03/2022 07:56
Updated: 11/04/2025 23:16
Changes: 02/03/2022 07:56 (37), 02/04/2022 18:30 (1), 07/22/2024 19:37 (34), 11/04/2025 23:16 (1)
Complete: 🔍
Cache ID: 216::103

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