#VU86241 NULL pointer dereference in Shim - CVE-2023-40546

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Main Vulnerability Database Vulnerabilities #VU86241

#VU86241 NULL pointer dereference in Shim - CVE-2023-40546

Published: February 7, 2024


Vulnerability identifier: #VU86241
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-2023-40546
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Shim
Software vendor:
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 NULL pointer dereference error within the mirror_one_esl() function in mok.c while creating a new ESL variable. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.


Remediation

Install updates from vendor's website.

External links