| ID |
CVE-2025-0684
|
| Sažetak |
A flaw was found in grub2. When performing a symlink lookup from a reiserfs filesystem, grub's reiserfs fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciouly crafted filesystem may lead some of those buffer size calculations to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result, the grub_reiserfs_read_symlink() will call grub_reiserfs_read_real() with a overflown length parameter, leading to a heap based out-of-bounds write during data reading. This flaw may be leveraged to corrupt grub's internal critical data and can result in arbitrary code execution, by-passing secure boot protections. |
| Reference |
|
| CVSS |
| Base: | 6.4 |
| Impact: | 5.9 |
| Exploitability: | 0.5 |
|
| Pristup |
| Vektor | Složenost | Autentikacija |
| LOCAL |
HIGH |
HIGH |
|
| Impact |
| Povjerljivost | Cjelovitost | Dostupnost |
| HIGH |
HIGH |
HIGH |
|
| CVSS vektor |
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H |
| Zadnje važnije ažuriranje |
03-03-2025 - 18:15 |
| Objavljeno |
03-03-2025 - 18:15 |
