📌 이 취약점에 대해 확인된 사실
전부 발행처가 발표한 값입니다. 우리가 계산하거나 판단한 숫자는 하나도 없습니다.
악용 여부
랜섬웨어 악용
심각도 (발행처 발표값)
심각9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
악용 확률 (EPSS)
100.0%
📄 원문 그대로
아래 문장은 전부 발행처가 쓴 것입니다. 번역하지 않습니다 — 보안 문서의 오역은 조치를 바꿉니다.
취약점 설명 (NVD)
CrushFTP 10 before 10.8.4 and 11 before 11.3.1 allows authentication bypass and takeover of the crushadmin account (unless a DMZ proxy instance is used), as exploited in the wild in March and April 2025, aka "Unauthenticated HTTP(S) port access." A race condition exists in the AWS4-HMAC (compatible with S3) authorization method of the HTTP component of the FTP server. The server first verifies the existence of the user by performing a call to login_user_pass() with no password requirement. This will authenticate the session through the HMAC verification process and up until the server checks for user verification once more. The vulnerability can be further stabilized, eliminating the need for successfully triggering a race condition, by sending a mangled AWS4-HMAC header. By providing only the username and a following slash (/), the server will successfully find a username, which triggers the successful anypass authentication process, but the server will fail to find the expected SignedHeaders entry, resulting in an index-out-of-bounds error that stops the code from reaching the session cleanup. Together, these issues make it trivial to authenticate as any known or guessable user (e.g., crushadmin), and can lead to a full compromise of the system by obtaining an administrative account.
CISA 원문
CrushFTP contains an authentication bypass vulnerability in the HTTP authorization header that allows a remote unauthenticated attacker to authenticate to any known or guessable user account (e.g., crushadmin), potentially leading to a full compromise. — CISA KEV · shortDescription 원문
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.— CISA KEV · requiredAction 원문
악용 확률 변화
우리가 매일 저장한 EPSS 스냅샷입니다. 원본은 전날 값만 주므로, 이 표는 수집을 시작한 이후만 보여줍니다.
| 기준일 | 확률 | 백분위 |
|---|---|---|
| 2026-11-02 | 99.97% | 100.0% |
| 2026-11-01 | 99.97% | 100.0% |
| 2026-10-31 | 99.97% | 100.0% |
| 2026-10-30 | 99.97% | 100.0% |
| 2026-10-29 | 99.97% | 100.0% |
| 2026-10-28 | 99.97% | 100.0% |
| 2026-10-27 | 99.97% | 100.0% |
| 2026-10-26 | 99.97% | 100.0% |
| 2026-10-25 | 99.97% | 100.0% |
| 2026-10-24 | 99.97% | 100.0% |
| 2026-10-23 | 99.97% | 100.0% |
| 2026-10-22 | 99.97% | 100.0% |
| 2026-10-21 | 99.97% | 100.0% |
| 2026-10-20 | 99.97% | 100.0% |
🧩 같은 약점 유형 — CWE-305
같은 분류의 다른 취약점입니다. 같은 실수가 제품을 가리지 않고 반복됩니다.