UBUNTU-CVE-2025-66506

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Source
https://ubuntu.com/security/CVE-2025-66506
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66506.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2025-66506
Upstream
Published
2025-12-05T00:00:00Z
Modified
2025-12-08T08:14:51.992104Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Fulcio is a free-to-use certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.3, function identity.extractIssuerURL splits (via a call to strings.Split) its argument (which is untrusted data) on periods. As a result, in the face of a malicious request with an (invalid) OIDC identity token in the payload containing many period characters, a call to extractIssuerURL incurs allocations to the tune of O(n) bytes (where n stands for the length of the function's argument), with a constant factor of about 16. This vulnerability is fixed in 1.8.3.

References

Affected packages

Ubuntu:25.10 / golang-github-sigstore-fulcio

Package

Name
golang-github-sigstore-fulcio
Purl
pkg:deb/ubuntu/golang-github-sigstore-fulcio@1.6.5-1?arch=source&distro=questing

Affected ranges

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

Affected versions

1.*

1.6.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-sigstore-fulcio-dev",
            "binary_version": "1.6.5-1"
        }
    ]
}

Ubuntu:25.04 / golang-github-sigstore-fulcio

Package

Name
golang-github-sigstore-fulcio
Purl
pkg:deb/ubuntu/golang-github-sigstore-fulcio@1.6.5-1?arch=source&distro=plucky

Affected ranges

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

Affected versions

1.*

1.2.0-2
1.6.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "golang-github-sigstore-fulcio-dev",
            "binary_version": "1.6.5-1"
        }
    ]
}