PT-2023-24730 · Insyde · Insydeh2O

Published 2023-09-18 · Updated 2024-09-25 · CVE-2023-34195

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Insyde InsydeH2O versions 5.0 through 5.5

Description An issue was discovered in SystemFirmwareManagementRuntimeDxe. The implementation of the GetImage method retrieves the value of a runtime variable named GetImageProgress, and later uses this value as a function pointer. This variable is wiped out by the same module near the end of the function. By setting this UEFI variable from the OS to point into custom code, an attacker could achieve arbitrary code execution in the DXE phase, before several chipset locks are set.

Recommendations For Insyde InsydeH2O versions 5.0 through 5.5, as a temporary workaround, consider restricting access to the GetImageProgress variable to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

CVE-2023-34195

Affected Products

Insydeh2O

References · 7

• https://insyde.com/security-pledge/SA-2023052 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-34195 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-34195 · Security Note
• https://insyde.com/security-pledge · Vendor Advisory
• https://t.me/cibsecurity/70649 · Telegram Post
• https://twitter.com/CVEnew/status/1703748029319135270 · Twitter Post
• https://t.me/cvenotify/96040 · Telegram Post