Vulnerability CVE-2023-40548: Information
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.
Severity: HIGH (7.4) Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Fixed packages
Package name | Branch | Fixed in version | Version from repository | Errata ID | Task # | State |
|---|---|---|---|---|---|---|
| shim | sisyphus | 15.8-alt1 | 15.8-alt2 | ALT-PU-2024-1671-2 | 339548 | Fixed |
| shim | p10 | 15.8-alt1 | 15.8-alt1 | ALT-PU-2024-1877-3 | 339915 | Fixed |
| shim | c10f1 | 15.8-alt1 | 15.8-alt1 | ALT-PU-2024-4050-2 | 342790 | Fixed |
| shim | c9f2 | 15.8-alt1 | 15.8-alt1 | ALT-PU-2024-1869-3 | 339892 | Fixed |
References to Advisories, Solutions, and Tools
Hyperlink | Resource |
|---|---|
| https://access.redhat.com/security/cve/CVE-2023-40548 |
|
| RHBZ#2241782 |
|
| RHSA-2024:1834 | |
| RHSA-2024:1835 | |
| RHSA-2024:1873 | |
| RHSA-2024:1876 | |
| RHSA-2024:1883 | |
| RHSA-2024:1902 | |
| RHSA-2024:1903 | |
| RHSA-2024:1959 | |
| RHSA-2024:2086 |