UBUNTU-CVE-2025-0677

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Source

https://ubuntu.com/security/CVE-2025-0677

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-0677.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2025-0677

Upstream

CVE-2025-0677

Published

2025-02-18T18:00:00Z

Modified

2025-07-14T07:02:28.687254Z

Severity

6.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

A flaw was found in grub2. When performing a symlink lookup, the grub's UFS module checks the inode's data size to allocate the internal buffer to read the file content, however, it fails to check if the symlink data size has overflown. When this occurs, grubmalloc() may be called with a smaller value than needed. When further reading the data from the disk into the buffer, the grubufslookupsymlink() function will write past the end of the allocated size. An attack can leverage this by crafting a malicious filesystem, and as a result, it will corrupt data stored in the heap, allowing for arbitrary code execution used to by-pass secure boot mechanisms.

References

Affected packages

Ubuntu:Pro:14.04:LTS / grub2

Package

Name: grub2
Purl: pkg:deb/ubuntu/grub2@2.02~beta2-9ubuntu1.21?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

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

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

2.02~beta2-9ubuntu1.20

2.02~beta2-9ubuntu1.21

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

Ubuntu:Pro:16.04:LTS / grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed@1.167~16.04.6?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

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

1.66.26

1.66.27

1.66.28

1.66.29

1.167~16.04.1

1.167~16.04.2

1.167~16.04.4

1.167~16.04.6

Ubuntu:Pro:16.04:LTS / grub2-unsigned

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.04-1ubuntu44

2.04-1ubuntu44.1

2.04-1ubuntu44.1.2

Ubuntu:Pro:18.04:LTS / grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed@1.187.3~18.04.1?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

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

1.167~18.04.5

1.173.2~18.04.1

1.187.2~18.04.1

1.187.3~18.04.1

Ubuntu:Pro:18.04:LTS / grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned@2.06-2ubuntu14.1?arch=source&distro=esm-infra/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.04-1ubuntu44

2.04-1ubuntu44.1

2.04-1ubuntu44.1.2

2.04-1ubuntu47.4

2.06-2ubuntu14

2.06-2ubuntu14.1

Ubuntu:Pro:20.04:LTS / grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed@1.187.12~20.04?arch=source&distro=esm-infra/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

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

1.167.2

1.173.2~20.04.1

1.173.4

1.187.2~20.04.2

1.187.3~20.04.1

1.187.4~20.04.1

1.187.6~20.04.1

1.187.12~20.04

Ubuntu:Pro:20.04:LTS / grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned@2.06-2ubuntu14.8?arch=source&distro=esm-infra/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.04-1ubuntu44

2.04-1ubuntu44.2

2.04-1ubuntu47.4

2.04-1ubuntu47.5

2.06-2ubuntu14

2.06-2ubuntu14.1

2.06-2ubuntu14.2

2.06-2ubuntu14.4

2.06-2ubuntu14.8

Ubuntu:22.04:LTS / grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed@1.187.12?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.173

1.174

1.176

1.177

1.178

1.179

1.180

1.182~22.04.1

1.187.2

1.187.3~22.04.1

1.187.4~22.04.1

1.187.6

1.187.12

Ubuntu:22.04:LTS / grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned@2.06-2ubuntu14.8?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.04-1ubuntu47

2.04-1ubuntu48

2.06-2ubuntu3

2.06-2ubuntu4

2.06-2ubuntu5

2.06-2ubuntu6

2.06-2ubuntu7

2.06-2ubuntu10

2.06-2ubuntu14

2.06-2ubuntu14.1

2.06-2ubuntu14.2

2.06-2ubuntu14.4

2.06-2ubuntu14.8

Ubuntu:24.04:LTS / grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed@1.202.5?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.197

1.199

1.201

1.202

1.202.2

1.202.5

Ubuntu:24.04:LTS / grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned@2.12-1ubuntu7.3?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.12~rc1-10ubuntu4

2.12~rc1-12ubuntu2

2.12-1ubuntu1

2.12-1ubuntu7

2.12-1ubuntu7.1

2.12-1ubuntu7.3

Ubuntu:25.04 / grub2-signed

Package

Name: grub2-signed
Purl: pkg:deb/ubuntu/grub2-signed@1.212?arch=source&distro=plucky

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.209

1.209.1

1.211

1.212

Ubuntu:25.04 / grub2-unsigned

Package

Name: grub2-unsigned
Purl: pkg:deb/ubuntu/grub2-unsigned@2.12-5ubuntu11?arch=source&distro=plucky

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.12-5ubuntu5

2.12-5ubuntu5.1

2.12-5ubuntu9

2.12-5ubuntu11