| Title | grub2 における不完全なブラックリストに関する脆弱性 |
|---|---|
| Summary | grub2 には、不完全なブラックリストに関する脆弱性が存在します。 |
| Possible impacts | 情報を取得される、情報を改ざんされる、およびサービス運用妨害 (DoS) 状態にされる可能性があります。 |
| Solution | ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。 |
| Publication Date | Aug. 27, 2020, midnight |
| Registration Date | Nov. 17, 2021, 2:59 p.m. |
| Last Update | Dec. 8, 2021, 11:09 a.m. |
| CVSS3.0 : 重要 | |
| Score | 7.5 |
|---|---|
| Vector | CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H |
| CVSS2.0 : 警告 | |
| Score | 6.2 |
|---|---|
| Vector | AV:L/AC:H/Au:N/C:C/I:C/A:C |
| レッドハット |
| Red Hat Enterprise Linux |
| Red Hat Enterprise Linux Server AUS |
| Red Hat Enterprise Linux Server EUS |
| Red Hat Enterprise Linux Server TUS |
| Red Hat Enterprise Linux Workstation |
| GNU Project |
| grub2 2.06 未満 |
| Fedora Project |
| Fedora |
| No | Changed Details | Date of change |
|---|---|---|
| 2 | [2021年12月08日] 参考情報：JVN (JVNVU#90348129) を追加 参考情報：ICS-CERT ADVISORY (ICSA-21-336-06) を追加 |
Dec. 8, 2021, 10:36 a.m. |
| 1 | [2021年11月17日] 掲載 |
Nov. 17, 2021, 2:59 p.m. |
| Summary | A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table (SSDT) containing code to overwrite the Linux kernel lockdown variable content directly into memory. The table is further loaded and executed by the kernel, defeating its Secure Boot lockdown and allowing the attacker to load unsigned code. The highest threat from this vulnerability is to data confidentiality and integrity, as well as system availability. |
|---|---|
| Publication Date | March 4, 2021, 2:15 a.m. |
| Registration Date | March 4, 2021, 10 a.m. |
| Last Update | Nov. 21, 2024, 2:03 p.m. |
| Configuration1 | or higher | or less | more than | less than | |
| cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* | 2.06 | ||||
| Configuration2 | or higher | or less | more than | less than | |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.7:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_server_eus:8.1:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:* | |||||
| Configuration3 | or higher | or less | more than | less than | |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | |||||
| Configuration4 | or higher | or less | more than | less than | |
| cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* | |||||
| cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* | |||||