AZL-35254

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AZL-35254

Summary: CVE-2023-40547 affecting package shim for versions less than 15.8-3

Details: A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully.

References: https://nvd.nist.gov/vuln/detail/CVE-2023-40547