Description
A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This flaw causes memory corruption and can lead to a crash or data integrity issues during the boot phase.
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- fedoraproject / fedora39 – 39
- RedHat / shim15.8
- RedHat / shim15.8 – 15.8
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-2023-40548
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2241782
Updated 38m ago · 8 sources