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CVE-2020-27749
Medium prioritySome fixes available 12 of 13
A flaw was found in grub2 in versions prior to 2.06. Variable names present are expanded in the supplied command line into their corresponding variable contents, using a 1kB stack buffer for temporary storage, without sufficient...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS | 16.04 LTS |
|---|---|---|---|---|---|
| grub2 | Not affected | Not affected | Not affected | Not affected | Not affected |
| grub2-signed | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Fixed | Fixed | Fixed |
CVE-2020-25647
Medium priorityA flaw was found in grub2 in versions prior to 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...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS | 16.04 LTS |
|---|---|---|---|---|---|
| grub2 | — | Not affected | Not affected | Not affected | Not affected |
| grub2-signed | — | Not affected | Not affected | Not affected | Not affected |
| grub2-unsigned | — | Not affected | Not affected | Not affected | Not affected |
CVE-2020-25632
Medium prioritySome fixes available 12 of 13
A flaw was found in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS | 16.04 LTS |
|---|---|---|---|---|---|
| grub2 | Not affected | Not affected | Not affected | Not affected | Not affected |
| grub2-signed | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Fixed | Fixed | Fixed |
CVE-2020-14372
Medium prioritySome fixes available 12 of 13
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...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS | 16.04 LTS |
|---|---|---|---|---|---|
| grub2 | Not affected | Not affected | Not affected | Not affected | Not affected |
| grub2-signed | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Fixed | Fixed | Fixed |
CVE-2020-15707
Medium prioritySome fixes available 8 of 9
Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS | 16.04 LTS |
|---|---|---|---|---|---|
| grub2 | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Not affected | Not affected | Vulnerable |
CVE-2020-15706
High prioritySome fixes available 8 of 9
GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS | 16.04 LTS |
|---|---|---|---|---|---|
| grub2 | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Not affected | Not affected | Vulnerable |
CVE-2020-15705
Medium prioritySome fixes available 8 of 10
GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS | 16.04 LTS |
|---|---|---|---|---|---|
| grub2 | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Not affected | Not affected | Vulnerable |
CVE-2020-14311
High prioritySome fixes available 10 of 12
There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS | 16.04 LTS |
|---|---|---|---|---|---|
| grub2 | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Fixed | Fixed | Vulnerable |
CVE-2020-14310
High prioritySome fixes available 10 of 12
There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS | 16.04 LTS |
|---|---|---|---|---|---|
| grub2 | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Fixed | Fixed | Vulnerable |
CVE-2020-14309
High prioritySome fixes available 10 of 12
There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size...
3 affected packages
grub2, grub2-signed, grub2-unsigned
| Package | 24.04 LTS | 22.04 LTS | 20.04 LTS | 18.04 LTS | 16.04 LTS |
|---|---|---|---|---|---|
| grub2 | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-signed | Not affected | Not affected | Fixed | Fixed | Fixed |
| grub2-unsigned | Not affected | Not affected | Fixed | Fixed | Vulnerable |