CVE-2021-33834 — HIGH (7.1)

Vulnerability Description

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.

CVSS Score

7.1

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Insyde	H2Offt	6.20.00
Insyde	Iscflashx64.Sys	3.9.3.0

Related Weaknesses (CWE)

CWE-787

References

https://www.insyde.com/security-pledgeNot Applicable
https://www.insyde.com/security-pledge/SA-2021004Vendor Advisory
https://www.insyde.com/security-pledgeNot Applicable
https://www.insyde.com/security-pledge/SA-2021004Vendor Advisory

FAQ

What is CVE-2021-33834?

CVE-2021-33834 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 co...

How severe is CVE-2021-33834?

CVE-2021-33834 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-33834?

Check the references section above for vendor advisories and patch information. Affected products include: Insyde H2Offt, Insyde Iscflashx64.Sys.