Shim Bootloader RCE Vulnerability - 20240208002¶
Overview¶
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.
What is vulnerable?¶
| Product(s) Affected | Summary | Severity | CVSS |
|---|---|---|---|
| Red Hat Enterprise Linux 7, 8, 9 | CVE-2023-40547 | Critical | 9.8 |
What has been observed?¶
There is no evidence of exploitation affecting Western Australian Government networks at the time of publishing.
Recommendation¶
The WA SOC recommends administrators apply the solutions as per vendor instructions to all affected devices within expected timeframe of 48hrs... (refer Patch Management):