The regular expression engine (regex.c) in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows remote attackers to cause a denial of service (infinite loop and crash) via multiple long requests to a Ruby socket, related to memory allocation failure, and as demonstrated against Webrick.
結論預警: CVE-2008-3443 綜合評估為高可利用風險（69/100）：CVSS 技術影響為中級，利用機率偏高（EPSS 15.68%，百分位 96%） 核心證據: 已收錄 1 筆公開利用參考（Exploit-DB）。 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 |
|---|---|---|---|---|
| 6239 | exploit_db | edb | 2008-08-13 | 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 | 2026-06-18 | 15.39% | 15.68% | +0.28% |
| 2 | 2026-06-15 | 39.15% | 15.39% | -23.75% |
| 3 | 2026-06-03 | — | 39.15% | — |
完整 EPSS 歷史 （共 23 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 |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2008-3443 |
ubuntu
|
medium | CVE-2008-3443 medium priority: Ubuntu including 2 source packages (ruby1.8, ruby1.9), 24 status rows across 12 suites (dapper, feisty, gutsy, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, upstream): not-affected 10, released 6, ignored 4, DNE 3, needed 1. | https://ubuntu.com/security/CVE-2008-3443 |
| 廠商 | 產品 | 版本 | 原始 CPE |
|---|---|---|---|
| ruby-lang | ruby | 1.6.8 | cpe:2.3:a:ruby-lang:ruby:1.6.8:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.0 | cpe:2.3:a:ruby-lang:ruby:1.8.0:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.1 | cpe:2.3:a:ruby-lang:ruby:1.8.1:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.1 | cpe:2.3:a:ruby-lang:ruby:1.8.1:-9:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.2 | cpe:2.3:a:ruby-lang:ruby:1.8.2:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.2 | cpe:2.3:a:ruby-lang:ruby:1.8.2:preview2:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.2 | cpe:2.3:a:ruby-lang:ruby:1.8.2:preview3:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.2 | cpe:2.3:a:ruby-lang:ruby:1.8.2:preview4:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.3 | cpe:2.3:a:ruby-lang:ruby:1.8.3:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.3 | cpe:2.3:a:ruby-lang:ruby:1.8.3:preview1:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.3 | cpe:2.3:a:ruby-lang:ruby:1.8.3:preview2:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.3 | cpe:2.3:a:ruby-lang:ruby:1.8.3:preview3:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.4 | cpe:2.3:a:ruby-lang:ruby:1.8.4:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.4 | cpe:2.3:a:ruby-lang:ruby:1.8.4:preview1:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.4 | cpe:2.3:a:ruby-lang:ruby:1.8.4:preview2:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.4 | cpe:2.3:a:ruby-lang:ruby:1.8.4:preview3:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:p11:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:p113:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:p114:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:p115:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:p12:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:p2:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:p231:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:p35:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:p52:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:preview1:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:preview2:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:preview3:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:preview4:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.5 | cpe:2.3:a:ruby-lang:ruby:1.8.5:preview5:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.6 | cpe:2.3:a:ruby-lang:ruby:1.8.6:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.6 | cpe:2.3:a:ruby-lang:ruby:1.8.6:p110:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.6 | cpe:2.3:a:ruby-lang:ruby:1.8.6:p111:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.6 | cpe:2.3:a:ruby-lang:ruby:1.8.6:p114:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.6 | cpe:2.3:a:ruby-lang:ruby:1.8.6:p230:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.6 | cpe:2.3:a:ruby-lang:ruby:1.8.6:p286:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.6 | cpe:2.3:a:ruby-lang:ruby:1.8.6:p36:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.6 | cpe:2.3:a:ruby-lang:ruby:1.8.6:preview1:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.6 | cpe:2.3:a:ruby-lang:ruby:1.8.6:preview2:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.6 | cpe:2.3:a:ruby-lang:ruby:1.8.6:preview3:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p17:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p22:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p71:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:preview1:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:preview2:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:preview3:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:preview4:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.0 | cpe:2.3:a:ruby-lang:ruby:1.9.0:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.0 | cpe:2.3:a:ruby-lang:ruby:1.9.0:r18423:*:*:*:*:*:* |