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CVE-2020-14372 A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when…
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| grub2 | Versions not published |
References
- bugzilla.redhat.com bugzilla.redhat.com
- access.redhat.com access.redhat.com
- security.netapp.com security.netapp.com
- FEDORA-2021-cab258a413 lists.fedoraproject.org
- GLSA-202104-05 security.gentoo.org
Timeline
- Published
- Last modified
Other CVEs of grub2
The 14 CVEs of grub2 →
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CVE-2021-3697
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CVE-2021-3696
A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader
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