A flaw was found in grub2 in versions before 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 malicious user to load unsigned code. The highest threat from this vulnerability is to data confidentiality and integrity, as well as system availability.
Vulnerable Product | Search on Vulmon | Subscribe to Product |
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gnu grub2 |
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redhat enterprise linux server aus 7.2 |
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redhat enterprise linux workstation 7.0 |
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redhat enterprise linux 7.0 |
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redhat enterprise linux server aus 7.3 |
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redhat enterprise linux server aus 7.4 |
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redhat enterprise linux server tus 7.4 |
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redhat enterprise linux server tus 7.6 |
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redhat enterprise linux server eus 7.6 |
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redhat enterprise linux server aus 7.6 |
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redhat enterprise linux 8.0 |
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redhat enterprise linux server eus 7.7 |
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redhat enterprise linux server aus 7.7 |
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redhat enterprise linux server tus 7.7 |
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redhat enterprise linux server eus 8.1 |
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redhat enterprise linux server tus 8.2 |
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redhat enterprise linux server aus 8.2 |
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fedoraproject fedora 33 |
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fedoraproject fedora 34 |
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netapp cloud backup - |
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netapp ontap select deploy administration utility - |