CVE-2023-39281: insyde insydeh2o Out-of-bounds Write

Vulnerability summary

CVE-2023-39281 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in insyde insydeh2o. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 40.9% of scored vulnerabilities.

Timeline

1. 01-11-2023
   PublishedVulnerability first disclosed.
2. 06-09-2024
   Last modifiedVulnerability information updated.

Description

A stack buffer overflow vulnerability discovered in AsfSecureBootDxe in Insyde InsydeH2O with kernel 5.0 through 5.5 allows attackers to run arbitrary code execution during the DXE phase.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).