CVE-2022-28737: red hat bootloader team shim Out-of-bounds Write

Vulnerability summary

CVE-2022-28737 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in red hat bootloader team shim. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.4% of scored vulnerabilities.

Timeline

1. 20-07-2023
   PublishedVulnerability first disclosed.
2. 22-10-2024
   Last modifiedVulnerability information updated.

Description

There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not discarded in such scenario.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.