#VU86238 Out-of-bounds read in Shim - CVE-2023-40549
Published: February 7, 2024
Vulnerability identifier: #VU86238
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2023-40549
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Shim
Shim
Software vendor:
Red Hat Bootloader Team
Red Hat Bootloader Team
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition within the verify_buffer_authenticode() function when parsing PE binary. A remote attacker can pass a specially crafted PE binary to the loader, trigger an out-of-bounds read error and perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.