CVE-2023-40547
Last modified
CVE-2023-40547 is a high-severity vulnerability rated 8.3/10 on the CVSS scale. A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. EPSS estimates a 4.89% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Shim | < 15.8 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux | 9.0 |
References
- https://access.redhat.com/security/cve/CVE-2023-40547Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2234589Issue Tracking, Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2023-40547Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2234589Issue Tracking, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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