kernel: lockdown bypass using IMA
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oracle Corporation | Oracle Linux | affected |
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Configuration 1 [-]
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| Package | CPE | Advisory | Released Date |
|---|---|---|---|
| Red Hat Enterprise Linux 9 | |||
| kernel-0:5.14.0-284.11.1.el9_2 | cpe:/a:redhat:enterprise_linux:9 | RHSA-2023:2458 | 2023-05-09T00:00:00Z |
| kernel-rt-0:5.14.0-284.11.1.rt14.296.el9_2 | cpe:/a:redhat:enterprise_linux:9::nfv | RHSA-2023:2148 | 2023-05-09T00:00:00Z |
| kernel-0:5.14.0-284.11.1.el9_2 | cpe:/o:redhat:enterprise_linux:9 | RHSA-2023:2458 | 2023-05-09T00:00:00Z |
No data available yet.
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2022-26729 | 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). |
Ubuntu USN |
USN-6031-1 | Linux kernel (OEM) vulnerabilities |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.198% probability within 30 days)
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| First Time appeared |
Oracle
Oracle linux |
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| CPEs | cpe:2.3:o:oracle:linux:7:-:*:*:*:*:*:* cpe:2.3:o:oracle:linux:8:-:*:*:*:*:*:* cpe:2.3:o:oracle:linux:9:-:*:*:*:*:*:* |
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| Vendors & Products |
Oracle
Oracle linux |
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| Weaknesses | CWE-346 | |
| Metrics |
ssvc
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| Description | An authentication bypass flaw was found in the Linux kernel’s IMA policy when a user performs lockdown. This flaw allows a local user to crash or potentially escalate their privileges on the system. | 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). |
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