ubuntu-cve-2020-14311
Vulnerability from osv_ubuntu
Published
2020-07-29 17:00
Modified
2025-10-24 04:48
Summary
Details
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 memory allocation with subsequent heap-based buffer overflow.
Severity
5.7 (Medium)
6.0 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "grub-common",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-coreboot",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-coreboot-bin",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-efi",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-efi-amd64",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-efi-amd64-bin",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-efi-arm",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-efi-arm-bin",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-efi-arm64",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-efi-arm64-bin",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-efi-ia32",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-efi-ia32-bin",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-emu",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-firmware-qemu",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-ieee1275",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-ieee1275-bin",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-linuxbios",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-pc",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-pc-bin",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-rescue-pc",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-theme-starfield",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-uboot",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-uboot-bin",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-xen",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub-xen-bin",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub2",
"binary_version": "2.02~beta2-9ubuntu1.20"
},
{
"binary_name": "grub2-common",
"binary_version": "2.02~beta2-9ubuntu1.20"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "grub2",
"purl": "pkg:deb/ubuntu/grub2@2.02~beta2-9ubuntu1.20?arch=source\u0026distro=trusty/esm"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.02~beta2-9ubuntu1.20"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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",
"2.02~beta2-9ubuntu1.6",
"2.02~beta2-9ubuntu1.7",
"2.02~beta2-9ubuntu1.8",
"2.02~beta2-9ubuntu1.11",
"2.02~beta2-9ubuntu1.12",
"2.02~beta2-9ubuntu1.14",
"2.02~beta2-9ubuntu1.15",
"2.02~beta2-9ubuntu1.16",
"2.02~beta2-9ubuntu1.17"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "grub-efi-amd64-signed",
"binary_version": "1.34.22+2.02~beta2-9ubuntu1.20"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "grub2-signed",
"purl": "pkg:deb/ubuntu/grub2-signed@1.34.22?arch=source\u0026distro=trusty/esm"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.34.22"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.22",
"1.23",
"1.24",
"1.25",
"1.26",
"1.27",
"1.30",
"1.31",
"1.32",
"1.33",
"1.34",
"1.34.1",
"1.34.2",
"1.34.3",
"1.34.4",
"1.34.5",
"1.34.6",
"1.34.7",
"1.34.8",
"1.34.9",
"1.34.13",
"1.34.14",
"1.34.16",
"1.34.17",
"1.34.18",
"1.34.20"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "grub-common",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-coreboot",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-coreboot-bin",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-efi",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-efi-amd64",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-efi-amd64-bin",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-efi-arm",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-efi-arm-bin",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-efi-arm64",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-efi-arm64-bin",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-efi-ia32",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-efi-ia32-bin",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-emu",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-firmware-qemu",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-ieee1275",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-ieee1275-bin",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-linuxbios",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-pc",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-pc-bin",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-rescue-pc",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-theme-starfield",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-uboot",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-uboot-bin",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-xen",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-xen-bin",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-xen-host",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub2",
"binary_version": "2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub2-common",
"binary_version": "2.02~beta2-36ubuntu3.26"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "grub2",
"purl": "pkg:deb/ubuntu/grub2@2.02~beta2-36ubuntu3.26?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.02~beta2-36ubuntu3.26"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.02~beta2-29",
"2.02~beta2-31",
"2.02~beta2-31ubuntu1",
"2.02~beta2-32",
"2.02~beta2-32ubuntu1",
"2.02~beta2-35",
"2.02~beta2-35ubuntu1",
"2.02~beta2-36",
"2.02~beta2-36ubuntu1",
"2.02~beta2-36ubuntu2",
"2.02~beta2-36ubuntu3",
"2.02~beta2-36ubuntu3.1",
"2.02~beta2-36ubuntu3.2",
"2.02~beta2-36ubuntu3.6",
"2.02~beta2-36ubuntu3.7",
"2.02~beta2-36ubuntu3.8",
"2.02~beta2-36ubuntu3.9",
"2.02~beta2-36ubuntu3.11",
"2.02~beta2-36ubuntu3.12",
"2.02~beta2-36ubuntu3.14",
"2.02~beta2-36ubuntu3.15",
"2.02~beta2-36ubuntu3.16",
"2.02~beta2-36ubuntu3.17",
"2.02~beta2-36ubuntu3.18",
"2.02~beta2-36ubuntu3.19",
"2.02~beta2-36ubuntu3.20",
"2.02~beta2-36ubuntu3.21",
"2.02~beta2-36ubuntu3.22",
"2.02~beta2-36ubuntu3.23"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "grub-efi-amd64-signed",
"binary_version": "1.66.26+2.02~beta2-36ubuntu3.26"
},
{
"binary_name": "grub-efi-arm64-signed",
"binary_version": "1.66.26+2.02~beta2-36ubuntu3.26"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "grub2-signed",
"purl": "pkg:deb/ubuntu/grub2-signed@1.66.26?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.66.26"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.55",
"1.56",
"1.57",
"1.58",
"1.59",
"1.61",
"1.62",
"1.63",
"1.64",
"1.65",
"1.66",
"1.66.1",
"1.66.2",
"1.66.6",
"1.66.7",
"1.66.8",
"1.66.9",
"1.66.11",
"1.66.12",
"1.66.14",
"1.66.15",
"1.66.16",
"1.66.17",
"1.66.18",
"1.66.19",
"1.66.20",
"1.66.21",
"1.66.22",
"1.66.23"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "grub-efi-amd64",
"binary_version": "2.04-1ubuntu44.1.2"
},
{
"binary_name": "grub-efi-amd64-bin",
"binary_version": "2.04-1ubuntu44.1.2"
},
{
"binary_name": "grub-efi-arm64",
"binary_version": "2.04-1ubuntu44.1.2"
},
{
"binary_name": "grub-efi-arm64-bin",
"binary_version": "2.04-1ubuntu44.1.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "grub2-unsigned",
"purl": "pkg:deb/ubuntu/grub2-unsigned@2.04-1ubuntu44.1.2?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.04-1ubuntu44",
"2.04-1ubuntu44.1",
"2.04-1ubuntu44.1.2"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "grub-common",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-coreboot",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-coreboot-bin",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-efi",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-efi-amd64",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-efi-amd64-bin",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-efi-arm",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-efi-arm-bin",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-efi-arm64",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-efi-arm64-bin",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-efi-ia32",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-efi-ia32-bin",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-emu",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-firmware-qemu",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-ieee1275",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-ieee1275-bin",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-linuxbios",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-pc",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-pc-bin",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-rescue-pc",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-theme-starfield",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-uboot",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-uboot-bin",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-xen",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-xen-bin",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub-xen-host",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub2",
"binary_version": "2.02-2ubuntu8.16"
},
{
"binary_name": "grub2-common",
"binary_version": "2.02-2ubuntu8.16"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "grub2",
"purl": "pkg:deb/ubuntu/grub2@2.02-2ubuntu8.16?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.02-2ubuntu8.16"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.02~beta3-4ubuntu7",
"2.02-2ubuntu1",
"2.02-2ubuntu2",
"2.02-2ubuntu4",
"2.02-2ubuntu6",
"2.02-2ubuntu7",
"2.02-2ubuntu8",
"2.02-2ubuntu8.1",
"2.02-2ubuntu8.2",
"2.02-2ubuntu8.3",
"2.02-2ubuntu8.4",
"2.02-2ubuntu8.6",
"2.02-2ubuntu8.7",
"2.02-2ubuntu8.9",
"2.02-2ubuntu8.10",
"2.02-2ubuntu8.12",
"2.02-2ubuntu8.13",
"2.02-2ubuntu8.14",
"2.02-2ubuntu8.15"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "grub-efi-amd64-signed",
"binary_version": "1.93.18+2.02-2ubuntu8.16"
},
{
"binary_name": "grub-efi-arm64-signed",
"binary_version": "1.93.18+2.02-2ubuntu8.16"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "grub2-signed",
"purl": "pkg:deb/ubuntu/grub2-signed@1.93.18?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.93.18"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.85",
"1.86",
"1.87",
"1.89",
"1.91",
"1.92",
"1.93",
"1.93.1",
"1.93.2",
"1.93.3",
"1.93.4",
"1.93.5",
"1.93.7",
"1.93.8",
"1.93.10",
"1.93.11",
"1.93.13",
"1.93.14",
"1.93.15",
"1.93.16"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "grub-efi-amd64",
"binary_version": "2.04-1ubuntu47.4"
},
{
"binary_name": "grub-efi-amd64-bin",
"binary_version": "2.04-1ubuntu47.4"
},
{
"binary_name": "grub-efi-arm64",
"binary_version": "2.04-1ubuntu47.4"
},
{
"binary_name": "grub-efi-arm64-bin",
"binary_version": "2.04-1ubuntu47.4"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "grub2-unsigned",
"purl": "pkg:deb/ubuntu/grub2-unsigned@2.04-1ubuntu47.4?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.04-1ubuntu47.4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.04-1ubuntu44",
"2.04-1ubuntu44.1",
"2.04-1ubuntu44.1.2"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "grub-common",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-coreboot",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-coreboot-bin",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-efi",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-efi-amd64",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-efi-amd64-bin",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-efi-amd64-signed-template",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-efi-arm",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-efi-arm-bin",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-efi-arm64",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-efi-arm64-bin",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-efi-arm64-signed-template",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-efi-ia32",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-efi-ia32-bin",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-emu",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-firmware-qemu",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-ieee1275",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-ieee1275-bin",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-linuxbios",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-pc",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-pc-bin",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-rescue-pc",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-theme-starfield",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-uboot",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-uboot-bin",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-xen",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-xen-bin",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub-xen-host",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub2",
"binary_version": "2.04-1ubuntu26.1"
},
{
"binary_name": "grub2-common",
"binary_version": "2.04-1ubuntu26.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "grub2",
"purl": "pkg:deb/ubuntu/grub2@2.04-1ubuntu26.1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.04-1ubuntu26.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.04-1ubuntu12",
"2.04-1ubuntu13",
"2.04-1ubuntu14",
"2.04-1ubuntu16",
"2.04-1ubuntu18",
"2.04-1ubuntu20",
"2.04-1ubuntu21",
"2.04-1ubuntu22",
"2.04-1ubuntu23",
"2.04-1ubuntu24",
"2.04-1ubuntu25",
"2.04-1ubuntu26"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "grub-efi-amd64-signed",
"binary_version": "1.142.3+2.04-1ubuntu26.1"
},
{
"binary_name": "grub-efi-arm64-signed",
"binary_version": "1.142.3+2.04-1ubuntu26.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "grub2-signed",
"purl": "pkg:deb/ubuntu/grub2-signed@1.142.3?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.142.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.128",
"1.129",
"1.130",
"1.131",
"1.133",
"1.134",
"1.135",
"1.136",
"1.137",
"1.138",
"1.139",
"1.140",
"1.141",
"1.142",
"1.142.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "grub-efi-amd64",
"binary_version": "2.04-1ubuntu47.4"
},
{
"binary_name": "grub-efi-amd64-bin",
"binary_version": "2.04-1ubuntu47.4"
},
{
"binary_name": "grub-efi-arm64",
"binary_version": "2.04-1ubuntu47.4"
},
{
"binary_name": "grub-efi-arm64-bin",
"binary_version": "2.04-1ubuntu47.4"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "grub2-unsigned",
"purl": "pkg:deb/ubuntu/grub2-unsigned@2.04-1ubuntu47.4?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.04-1ubuntu47.4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.04-1ubuntu44",
"2.04-1ubuntu44.2"
]
}
],
"aliases": [],
"details": "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 memory allocation with subsequent heap-based buffer overflow.",
"id": "UBUNTU-CVE-2020-14311",
"modified": "2025-10-24T04:48:32Z",
"published": "2020-07-29T17:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-14311"
},
{
"type": "REPORT",
"url": "https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/"
},
{
"type": "REPORT",
"url": "https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass"
},
{
"type": "REPORT",
"url": "https://www.openwall.com/lists/oss-security/2020/07/29/3"
},
{
"type": "REPORT",
"url": "https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4432-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-14311"
}
],
"related": [
"USN-4432-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-14311"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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