CVE-2025-66506: linuxfoundation fulcio

csirt@kutim:~/threat-intel/cve/CVE-2025-66506

CVSS 7.5 · High EPSS 0,21%

Kerentanan Asymmetric Resource Consumption (Amplification) pada linuxfoundation fulcio. Skor CVSS 3.1 7.5 (High) menurut github.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD: 4 Desember 2025
Terakhir diubah: 17 Juni 2026
Status NVD: Analyzed
CVSS 3.1: 7.5 (High), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-405: Asymmetric Resource Consumption (Amplification)
EPSS (30 hari): 0,21% peluang dieksploitasi; lebih tinggi dari 10,5% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
linuxfoundation	fulcio	Semua versi sebelum 1.8.3

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.