UBUNTU-CVE-2025-66034

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Source
https://ubuntu.com/security/CVE-2025-66034
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66034.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2025-66034
Upstream
Downstream
Related
Published
2025-11-29T01:16:00Z
Modified
2025-12-10T08:31:55.376200Z
Severity
  • 6.3 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:L CVSS Calculator
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

fontTools is a library for manipulating fonts, written in Python. In versions from 4.33.0 to before 4.60.2, the fonttools varLib (or python3 -m fontTools.varLib) script has an arbitrary file write vulnerability that leads to remote code execution when a malicious .designspace file is processed. The vulnerability affects the main() code path of fontTools.varLib, used by the fonttools varLib CLI and any code that invokes fontTools.varLib.main(). This issue has been patched in version 4.60.2.

References

Affected packages

Ubuntu:Pro:24.04:LTS / fonttools

Package

Name
fonttools
Purl
pkg:deb/ubuntu/fonttools@4.46.0-1ubuntu0.1~esm1?arch=source&distro=esm-apps/noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.46.0-1ubuntu0.1~esm1

Affected versions

4.*

4.38.0-1build1
4.38.0-1build2
4.46.0-1
4.46.0-1build2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "4.46.0-1ubuntu0.1~esm1",
            "binary_name": "fonttools"
        },
        {
            "binary_version": "4.46.0-1ubuntu0.1~esm1",
            "binary_name": "python3-fonttools"
        }
    ]
}

Ubuntu:25.10 / fonttools

Package

Name
fonttools
Purl
pkg:deb/ubuntu/fonttools@4.55.3-2ubuntu0.25.10.1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.55.3-2ubuntu0.25.10.1

Affected versions

4.*

4.55.3-2build1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "4.55.3-2ubuntu0.25.10.1",
            "binary_name": "fonttools"
        },
        {
            "binary_version": "4.55.3-2ubuntu0.25.10.1",
            "binary_name": "python3-fonttools"
        }
    ]
}

Ubuntu:25.04 / fonttools

Package

Name
fonttools
Purl
pkg:deb/ubuntu/fonttools@4.55.3-2ubuntu0.25.04.1?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.55.3-2ubuntu0.25.04.1

Affected versions

4.*

4.46.0-1build2
4.54.1-4ubuntu1
4.55.0-3
4.55.3-1
4.55.3-2
4.55.3-2build1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "4.55.3-2ubuntu0.25.04.1",
            "binary_name": "fonttools"
        },
        {
            "binary_version": "4.55.3-2ubuntu0.25.04.1",
            "binary_name": "python3-fonttools"
        }
    ]
}