In the linux kernel, if IMA appraisal is used with the "ima_appraise=log" boot param, lockdown can be defeated with kexec on any machine when Secure Boot is disabled or unavailable. IMA prevents setting "ima_appraise=log" from the boot param when Secure Boot is enabled, but this does not cover cases where lockdown is used without Secure Boot. CVSS 3.1 Base Score 6.7 (Confidentiality, Integrity, Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
En el kernel de Linux, si se utiliza la evaluación IMA con el parámetro de arranque "ima_appraise=log", el bloqueo se puede anular con kexec en cualquier máquina cuando el arranque seguro está deshabilitado o no está disponible. IMA impide configurar "ima_appraise=log" desde el parámetro de arranque cuando el arranque seguro está habilitado, pero esto no cubre los casos en los que se utiliza el bloqueo sin arranque seguro. CVSS 3.1 Puntuación base 6,7 (impactos de confidencialidad, integridad y disponibilidad). Vector CVSS: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | HIGH |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | HIGH |
| Integrity Impact | HIGH |
| Availability Impact | HIGH |
| Source | Type | Description |
|---|---|---|
| 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary |
en
CWE-346
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| oracle | linux | 7 | <built-in method update of dict object at 0x7fd36945c9c0> | Operating System |
| oracle | linux | 8 | <built-in method update of dict object at 0x7fd36945d7c0> | Operating System |
| oracle | linux | 9 | <built-in method update of dict object at 0x7fd38557f5c0> | Operating System |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:oracle:linux:7:-:*:*:*:*:*:* |
| Yes | cpe:2.3:o:oracle:linux:8:-:*:*:*:*:*:* |
| Yes | cpe:2.3:o:oracle:linux:9:-:*:*:*:*:*:* |