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.
CVSS breakdown
CVSS 3.1
Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected products
- RedHat / enterprise_linux7.0 – 7.0
- RedHat / enterprise_linux8.0 – 8.0
- RedHat / enterprise_linux9.0 – 9.0
- RedHat / shim15.8
References
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2024:1834
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2024:1835
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2024:1873
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2024:1876
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2024:1883
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2024:1902
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2024:1903
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2024:1959
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2024:2086
- VENDOR_ADVISORYhttps://access.redhat.com/security/cve/CVE-2023-40547
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2234589
Updated 20m ago · 8 sources