Описание
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.
| Релиз | Статус | Примечание |
|---|---|---|
| bionic | ignored | end of standard support |
| devel | not-affected | does not affect Secure Boot |
| esm-infra-legacy/trusty | not-affected | does not affect Secure Boot |
| esm-infra/bionic | not-affected | does not affect Secure Boot |
| esm-infra/focal | not-affected | does not affect Secure Boot |
| esm-infra/xenial | not-affected | does not affect Secure Boot |
| focal | not-affected | does not affect Secure Boot |
| jammy | not-affected | does not affect Secure Boot |
| kinetic | not-affected | does not affect Secure Boot |
| lunar | not-affected | does not affect Secure Boot |
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| Релиз | Статус | Примечание |
|---|---|---|
| bionic | released | 1.167~18.04.5 |
| devel | not-affected | 1.193 |
| esm-infra-legacy/trusty | needed | |
| esm-infra/bionic | not-affected | 1.167~18.04.5 |
| esm-infra/focal | not-affected | 1.167.2 |
| esm-infra/xenial | not-affected | 1.164 |
| focal | released | 1.167.2 |
| groovy | released | 1.167.2 |
| hirsute | released | 1.164 |
| impish | released | 1.169 |
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| Релиз | Статус | Примечание |
|---|---|---|
| bionic | released | 2.04-1ubuntu44.1.2 |
| devel | not-affected | 2.06-2ubuntu17 |
| esm-infra-legacy/trusty | DNE | |
| esm-infra/bionic | not-affected | 2.04-1ubuntu44.1.2 |
| esm-infra/focal | not-affected | 2.04-1ubuntu44.2 |
| esm-infra/xenial | not-affected | 2.04-1ubuntu42 |
| focal | released | 2.04-1ubuntu44.2 |
| groovy | released | 2.04-1ubuntu44.2 |
| hirsute | released | 2.04-1ubuntu42 |
| impish | released | 2.04-1ubuntu45 |
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6.2 Medium
CVSS2
7.5 High
CVSS3
Связанные уязвимости
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.
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.
A flaw was found in grub2 in versions prior to 2.06, where it incorrec ...
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.
6.2 Medium
CVSS2
7.5 High
CVSS3