Published: 03/03/2021 Updated: 21/11/2024

A flaw was found in grub2 in versions before 2.06. During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

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gnu grub2
redhat enterprise linux 7.0
redhat enterprise linux 8.0
redhat enterprise linux server aus 7.2
redhat enterprise linux server aus 7.3
redhat enterprise linux server aus 7.4
redhat enterprise linux server aus 7.6
redhat enterprise linux server aus 7.7
redhat enterprise linux server aus 8.2
redhat enterprise linux server eus 7.6
redhat enterprise linux server eus 7.7
redhat enterprise linux server eus 8.1
redhat enterprise linux server tus 7.4
redhat enterprise linux server tus 7.6
redhat enterprise linux server tus 7.7
redhat enterprise linux server tus 8.2
redhat enterprise linux workstation 7.0
fedoraproject fedora 33
fedoraproject fedora 34
netapp ontap select deploy administration utility -

Several vulnerabilities have been discovered in the GRUB2 bootloader CVE-2020-14372 It was discovered that the acpi command allows a privileged user to load crafted ACPI tables when Secure Boot is enabled CVE-2020-25632 A use-after-free vulnerability was found in the rmmod command CVE-2020-25647 An out-of-bound write vulnerabili ...

A flaw was found in GRUB 2, 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 exe ...

A flaw was found in grub2 During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism The highest threat from this vu ...

grub_usb_device_initialize() is called to handle USB device initialization It reads out the descriptors it needs from the USB device and uses that data to fill in some USB data structures grub_usb_device_initialize() performs very little bounds checking and simply assumes the USB device provides sane values This behavior can trigger memory corru ...

HP has been informed of a potential security vulnerability in GRUB2 bootloaders commonly used by Linux This vulnerability, known as “There’s a Hole in the Boot” (also nicknamed “BootHole”), could allow bypass of UEFI Secure Boot and allow arbitrary code execution Additional GRUB2 vulnerabilities found in response to the initial report ...

On 2021-02-23 we notified the distros list about multiple grub vulnerabilities This is the formal announcement sent to grub-devel which explains in a little more detail what has been done jch [snip] ...

https://nvd.nist.gov https://www.debian.org/security/2021/dsa-4867

CVE-2020-25647

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