CVE-2025-66506
Fulcio allocates excessive memory during token parsing in github.com/sigstore/fulcio
描述
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.
如何修補 CVE-2025-66506
要修補 CVE-2025-66506,請將受影響套件升級到下列已修補版本。
- —未列出修補版本
- —升級至 1.8.3 或更新版本
- —升級至 1.8.3 或更新版本
CVE-2025-66506 正在被利用嗎?
低 — EPSS 為 0.0%,目前沒有觀察到大規模利用活動。
受影響套件(3)
- from 0
- from 0, < 1.8.3
- from 0, < 1.8.3
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |