vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.
結論預警: CVE-2011-2523 綜合評估為高可利用風險(91.1/100):CVSS 技術影響為嚴重級,利用機率偏高(EPSS 96.18%,百分位 100%) 核心證據: 已收錄 3 筆公開利用參考(Exploit-DB)。 近一日 EPSS 上升 +1.92%,被利用關注度持續升高。 強制指令: 存在公開利用—請盤點暴露面、落實緩解措施並優先修補。
風險隨態勢動態變化;本站持續評估並同步更新本頁展示內容。
| EDB-ID | 來源 | 類型 | 公開時間 | 連結 |
|---|---|---|---|---|
| 49757 | exploit_db | edb | 2021-04-12 | Exploit-DB ↗ |
| 17491 | exploit_db | edb | 2011-07-05 | Exploit-DB ↗ |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS 日更估計相對被利用可能性;百分位表示該 CVE 在已評分漏洞中的相對排名(越高表示相對更嚴重)。
| # | 日期 | 舊 EPSS 分數 | 新 EPSS 分數 | 變化(新 − 舊) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 94.26% | 96.18% | +1.92% |
| 2 | 2025-08-28 | 94.23% | 94.26% | +0.03% |
| 3 | 2025-08-16 | — | 94.23% | — |
完整 EPSS 歷史 (共 38 筆)
該 CVE 的 CVSS 指標。
| 底座分 | 版本 | 嚴重度 | 向量 | 可利用性 | 影響 | 分數來源 |
|---|---|---|---|---|---|---|
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2011-2523 unimportant priority: Debian including 1 source packages (vsftpd), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2011-2523 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2011-2523 |
ubuntu
|
high | CVE-2011-2523 high priority: Ubuntu including 1 source packages (vsftpd), 6 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): not-affected 5, needs-triage 1. | https://ubuntu.com/security/CVE-2011-2523 |
| 廠商 | 產品 | 版本 | 原始 CPE |
|---|---|---|---|
| vsftpd_project | vsftpd | 2.3.4 | cpe:2.3:a:vsftpd_project:vsftpd:2.3.4:*:*:*:*:*:*:* |
| debian | debian_linux | 8.0 | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| URL | 標籤 |
|---|---|
| http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Command-Execution.html | |
| https://access.redhat.com/security/cve/cve-2011-2523 | Third Party Advisory |
| https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Command-Execution.html | Exploit Third Party Advisory VDB Entry |
| https://security-tracker.debian.org/tracker/CVE-2011-2523 | Third Party Advisory |
| https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10805 | Third Party Advisory |
| https://www.openwall.com/lists/oss-security/2011/07/11/5 | Mailing List Third Party Advisory |