Multiple vulnerabilities have been discoverd in GRUB, which may lead to secure boot circumvention or code execution.
| Package | Arch | Vulnerable | Unaffected |
|---|---|---|---|
| sys-boot/grub | * | < 2.06-r4 | >= 2.06-r4 |
GNU GRUB is a multiboot boot loader used by most Linux systems.
Multiple vulnerabilities have been discovered in GRUB. Please review the CVE identifiers referenced below for details.
Please review the referenced CVE identifiers for details.
There is no known workaround at this time.
All GRUB users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-boot/grub-2.06-r4"
Multiple vulnerabilities have been discovered in GRUB, the worst of which may allow for secureboot bypass.
| Package | Arch | Vulnerable | Unaffected |
|---|---|---|---|
| sys-boot/grub | * | < 2.06 | >= 2.06 |
GNU GRUB is a multiboot boot loader used by most Linux systems.
Multiple vulnerabilities have been discovered in GRUB. Please review the CVE identifiers referenced below for details.
Please review the referenced CVE identifiers for details.
There is no known workaround at this time.
All GRUB users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-boot/grub-2.06-r3"
After upgrading, make sure to run the grub-install command with options appropriate for your system. See the GRUB2 Gentoo Wiki page for directions. Your system will be vulnerable until this action is performed.
GRUB's authentication prompt can be bypassed by entering a sequence of backspace characters.
| Package | Arch | Vulnerable | Unaffected |
|---|---|---|---|
| sys-boot/grub | * | < 2.02_beta2-r8 | >= 2.02_beta2-r8, >= 0.97 (revision) |
GNU GRUB is a multiboot boot loader used by most Linux systems.
An integer underflow in GRUB’s username/password authentication code has been discovered.
An attacker with access to the system console may bypass the username prompt by entering a sequence of backspace characters, allowing them e.g. to get full access to GRUB’s console or to load a customized kernel.
There is no known workaround at this time.
All GRUB 2.x users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-boot/grub-2.02_beta2-r8"
After upgrading, make sure to run the grub2-install command with options appropriate for your system. See the GRUB2 Quick Start guide in the references below for examples. Your system will be vulnerable until this action is performed.