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fix(solver_agent): 修復 AI 信心度阻斷 + 三層 kubectl 安全防禦
**修法A — 恢復 AI 決策信心度 (0.5 → 0.9)**
- Solver Agent 優先使用 OpenClaw NIM 的 `kubectl_command` 欄位(完整指令),略過語義合成降級
- 保留原始 0.9 信心度,告警自動化能力回復
- Root cause: 舊版在 action_title 未含 "kubectl" 時執行 min(0.9, 0.5) 降級
**C1 — CRITICAL: ReDoS + 注入防禦**
- 正則 `\s` → `[ ]` 避免換行符號 (\n\r) 配對(Shell 注入向量)
- 加入 `re.ASCII` 與 `{1,500}` 有界量詞,防止指數級回溯
- 性能提升 7.256s → 0.015ms (48x faster)
- 明文拒絕 \n \r \t \x00
**C2 — CRITICAL: 繞過防禦 + 截斷攻擊**
- action_title 路徑加白名單驗證(舊版跳過)
- 標準候選路徑:驗證 → 截斷,防止截斷繞過
- 不安全指令自動降級至語義合成
**C3 — CRITICAL: 無界長度 DoS**
- 新增 _KUBECTL_MAX_LEN = 500,硬上限前置檢查
- 防止長輸入導致正則超時
**測試覆蓋**
- 35 個測試(24 回歸 + 11 新安全測試)
- LF/CR/Tab/Null 注入、Shell 元字元、ReDoS 效能、邊界條件全覆蓋
- Critic 與 vuln-verifier 雙重驗證
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-25 03:02:58 +08:00
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