USN-2836-1

Hector Marco and Ismael Ripoll discovered that GRUB incorrectly handled the backspace key when configured to use authentication. A local attacker could use this issue to bypass GRUB password protection.

References

Affected packages

Ubuntu:14.04:LTS / grub2

Package

Name: grub2
Purl: pkg:deb/ubuntu/grub2@2.02~beta2-9ubuntu1.6?arch=source&distro=trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.02~beta2-9ubuntu1.6

Affected versions

2.*

2.00-19ubuntu2

2.00-19ubuntu3

2.00-19ubuntu4

2.00-20

2.00-21

2.00-22

2.02~beta2-5

2.02~beta2-6

2.02~beta2-7

2.02~beta2-8

2.02~beta2-9

2.02~beta2-9ubuntu1

2.02~beta2-9ubuntu1.1

2.02~beta2-9ubuntu1.2

2.02~beta2-9ubuntu1.3

2.02~beta2-9ubuntu1.4

2.02~beta2-9ubuntu1.5

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-common"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-coreboot"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-coreboot-bin"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-efi"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-efi-amd64"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-efi-amd64-bin"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-efi-arm"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-efi-arm-bin"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-efi-arm64"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-efi-arm64-bin"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-efi-ia32"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-efi-ia32-bin"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-emu"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-firmware-qemu"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-ieee1275"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-ieee1275-bin"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-linuxbios"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-pc"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-pc-bin"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-rescue-pc"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-theme-starfield"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-uboot"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-uboot-bin"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-xen"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub-xen-bin"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub2"
        },
        {
            "binary_version": "2.02~beta2-9ubuntu1.6",
            "binary_name": "grub2-common"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-2836-1.json"

cves_map

{
    "ecosystem": "Ubuntu:14.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2015-8370"
        }
    ]
}