VDB-209319 · CVE-2022-35408 · BRLY-2022-022

InsydeH2O up to 5.5 SMM Driver UsbLegacyControlSmm privilege escalation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.7	$0-$5k	0.00

Summaryinfo

A vulnerability was found in InsydeH2O up to 5.5. It has been classified as problematic. Affected by this vulnerability is the function UsbLegacyControlSmm of the component SMM Driver. Performing a manipulation results in an unknown weakness. This vulnerability is cataloged as CVE-2022-35408. There is no exploit available.

Detailsinfo

A vulnerability was found in InsydeH2O up to 5.5. It has been classified as problematic. This affects the function UsbLegacyControlSmm of the component SMM Driver. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM callout vulnerability in the SMM driver in UsbLegacyControlSmm leads to possible arbitrary code execution in SMM and escalation of privileges. An attacker could overwrite the function pointers in the EFI_BOOT_SERVICES table before the USB SMI handler triggers. (This is not exploitable from code running in the operating system.)

The weakness was shared 09/23/2022 as BRLY-2022-022. It is possible to read the advisory at binarly.io. This vulnerability is uniquely identified as CVE-2022-35408 since 07/08/2022. Technical details of the vulnerability are known, but there is no available exploit.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

InsydeH2O

Version

License

commercial

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

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/08/2022 🔍
09/22/2022 +76 days 🔍
09/23/2022 +0 days 🔍
05/27/2025 +977 days 🔍

Sourcesinfo

Advisory: BRLY-2022-022
Status: Not defined

CVE: CVE-2022-35408 (🔍)
GCVE (CVE): GCVE-0-2022-35408
GCVE (VulDB): GCVE-100-209319

Entryinfo

Created: 09/23/2022 00:33
Updated: 05/27/2025 18:35
Changes: 09/23/2022 00:33 (37), 10/22/2022 11:43 (11), 05/27/2025 18:35 (15)
Complete: 🔍
Cache ID: 216::103