PT-2023-2392 · Insyde · Insydeh2O

Jeremy Boone + 1 · Published 2023-04-10 · Updated 2023-08-14 · CVE-2023-22615

Positive Technologies (AI Summary)

CVSS v3.1

8.4

High

Base vector

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

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

Description An issue was discovered in IhisiSmm that may corrupt SMRAM. An attacker can pass an address in the RCX save state register that overlaps SMRAM, coercing an IHISI subfunction handler to overwrite private SMRAM. The vulnerability is related to errors in state management and can be exploited by a remote attacker to cause a denial of service.

Recommendations For Insyde InsydeH2O with kernel versions 5.0 through 5.5, consider disabling the IHISI subfunction execution as a temporary workaround until a patch is available. Restrict access to the SMRAM to minimize the risk of exploitation. Avoid using the RCX save state register in the affected kernel versions until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-371

CWE-787

Related Identifiers

BDU:2023-02175

CVE-2023-22615

Affected Products

Insydeh2O

References · 7

• https://insyde.com/security-pledge · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-22615 · Security Note
• https://osv.dev/vulnerability/CVE-2023-22615 · Vendor Advisory
• https://insyde.com/security-pledge/SA-2023021 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-02175 · Security Note
• https://vuldb.com/ru/?id.225665 · Note
• https://t.me/cvenotify/49097 · Telegram Post