UBUNTU-CVE-2020-25632

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Source
https://ubuntu.com/security/CVE-2020-25632
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25632.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-25632
Upstream
Downstream
Related
Published
2021-03-02T18:00:00Z
Modified
2025-09-08T16:46:19Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
  • 8.2 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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 scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

References

Affected packages

Ubuntu:Pro:14.04:LTS / grub2-signed

Package

Name
grub2-signed
Purl
pkg:deb/ubuntu/grub2-signed@1.34.24?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

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
1.34.22
1.34.24

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.34.24+2.02~beta2-9ubuntu1.21"
        }
    ]
}

Ubuntu:18.04:LTS / grub2-signed

Package

Name
grub2-signed
Purl
pkg:deb/ubuntu/grub2-signed@1.167~18.04.5?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.167~18.04.5

Affected versions

1.*

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
1.93.18
1.93.19
1.93.20
1.93.21
1.93.22
1.93.24
1.167~18.04.1
1.167~18.04.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.167~18.04.5+2.04-1ubuntu44.1.2"
        },
        {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.167~18.04.5+2.04-1ubuntu44.1.2"
        }
    ]
}

Ubuntu:18.04:LTS / grub2-unsigned

Package

Name
grub2-unsigned
Purl
pkg:deb/ubuntu/grub2-unsigned@2.04-1ubuntu44.1.2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.04-1ubuntu44.1.2

Affected versions

2.*

2.04-1ubuntu44
2.04-1ubuntu44.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "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"
        }
    ]
}

Ubuntu:20.04:LTS / grub2-signed

Package

Name
grub2-signed
Purl
pkg:deb/ubuntu/grub2-signed@1.167.2?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.167.2

Affected versions

1.*

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
1.142.3
1.142.4
1.142.5
1.142.6
1.142.8
1.142.9
1.142.10
1.142.11
1.167

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.167.2+2.04-1ubuntu44.2"
        },
        {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.167.2+2.04-1ubuntu44.2"
        }
    ]
}

Ubuntu:20.04:LTS / grub2-unsigned

Package

Name
grub2-unsigned
Purl
pkg:deb/ubuntu/grub2-unsigned@2.04-1ubuntu44.2?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.04-1ubuntu44.2

Affected versions

2.*

2.04-1ubuntu44

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.04-1ubuntu44.2"
        },
        {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.04-1ubuntu44.2"
        },
        {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.04-1ubuntu44.2"
        },
        {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.04-1ubuntu44.2"
        }
    ]
}