VDB-239208 · CVE-2021-33834 · GCVE-0-2021-33834

Insyde H2OFFT 6.20.00 IOCTL iscflashx64.sys memory corruption

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.
6.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Insyde H2OFFT 6.20.00 and classified as critical. This affects an unknown part in the library iscflashx64.sys of the component IOCTL Handler. The manipulation results in memory corruption. This vulnerability was named CVE-2021-33834. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability was found in Insyde H2OFFT 6.20.00. It has been classified as critical. Affected is an unknown code in the library iscflashx64.sys of the component IOCTL Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on availability. CVE summarizes:

An issue was discovered in iscflashx64.sys 3.9.3.0 in Insyde H2OFFT 6.20.00. When handling IOCTL 0x22229a, the input used to allocate a buffer and copy memory is mishandled. This could cause memory corruption or a system crash.

The weakness was presented 09/08/2023. The advisory is shared for download at insyde.com. This vulnerability is traded as CVE-2021-33834 since 06/03/2021. There are known technical details, but no exploit is available.

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

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Insyde

Name

H2OFFT

Version

6.20.00

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.3

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

NVD Base Score: 7.1
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/03/2021 🔍
09/08/2023 +827 days 🔍
09/08/2023 +0 days 🔍
10/04/2023 +26 days 🔍

Sourcesinfo

Advisory: insyde.com
Status: Confirmed

CVE: CVE-2021-33834 (🔍)
GCVE (CVE): GCVE-0-2021-33834
GCVE (VulDB): GCVE-100-239208

Entryinfo

Created: 09/08/2023 07:28
Updated: 10/04/2023 08:46
Changes: 09/08/2023 07:28 (39), 10/04/2023 08:46 (11)
Complete: 🔍
Cache ID: 216::103