fix: 渲染引擎全链路安全加固 P0+P1 #317

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xiaoxia merged 21 commits from fix/render-engine-security-p0-p1 into develop 2026-07-14 18:15:21 +08:00
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fix: 渲染引擎全链路安全加固 P0+P1

fix: 渲染引擎全链路安全加固 P0+P1
xiaoxia added 1 commit 2026-07-14 13:18:59 +08:00
fix: 渲染引擎全链路安全加固 P0+P1
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9e10e31a29
P0-1 SSRF防护:统一URL安全校验方案
- 新增 url_security.py:SSRF防护工具(scheme白名单、端口白名单、内网IP拦截、内网主机名拦截、DNS解析校验)
- generation.py URL校验函数增加SSRF前置校验
- PiP引擎URL类型增加安全校验
- 贴纸引擎URL类型增加安全校验

P0-2 路径遍历防护:输入路径校验强化
- 新增 path_security.py:路径安全工具(路径遍历防护、local:// schema校验、文件名清理、允许目录白名单)
- resolve_asset_path 加固:本地绝对路径白名单、空字节检测、存储键路径遍历拦截
- PiP引擎local_path类型:增加允许目录校验
- 贴纸引擎:区分本地路径/URL,分别增加安全校验

P1 裸subprocess统一:3处FFmpeg调用走run_ffmpeg
- unified_render_service.py _extract_audio:改用 run_ffmpeg
- compose_video.py:改用 run_ffmpeg
- edit_plan_generation.py:改用 run_ffmpeg

新增测试:
- test_url_security.py:29个SSRF防护单测
- test_path_security.py:27个路径遍历防护单测
- 原有171+105=276个单测零回归
Author
Owner

🔍 安全复审结果:⚠️ 有条件通过

总体评价

PR在安全基础设施建设方面质量不错:

  • url_security.pypath_security.py 两个模块设计完善
  • 单元测试覆盖全面(56个用例全部通过)
  • 路径遍历防护实现彻底

SSRF防护的接入点遗漏严重,特别是原审计报告P0-1明确指出的3个TTS下载点一个都没修,等于P0级问题实质上没解决。


🔴 必须修复(合并前)

1. TTS 3个下载点全部未接入SSRF防护(P0)

原审计报告P0-1明确指出的位置,一个都没修:

  • packages/application/tts_job/workflow.py:100_transfer_audio_to_oss() httpx.get
  • packages/application/tts_job/workflow.py:467 — 分段合成音频下载 httpx.get
  • packages/application/tts_job/streaming_service.py:228_download_audio() httpx.get

都使用 follow_redirects=True,无任何SSRF校验。

2. BGM下载点未接入SSRF防护(P0/P1)

  • apps/worker/worker_app/tasks/generation.py:370 — BGM外部直链 urlretrieve
  • apps/worker/worker_app/tasks/generation.py:407 — BGM预设库 urlretrieve
  • apps/worker/worker_app/tasks/batch_download.py:112 — 批量下载HTTP回退 urlretrieve

3. 重定向防护缺失(P0)

url_security.py 只校验初始URL,不校验重定向目标。所有 follow_redirects=True 或默认跟随重定向的下载点,都可能被302跳转到内网IP绕过SSRF。

建议:封装 safe_download() 函数,每步重定向都重新校验URL。


🟡 建议修复

4. 裸subprocess只修了3/8处(P1-1)

还剩:asset_analyzer.py (3处)、ingest.py (1处)、voice_extraction.py (1处)、audio_merger.py (1处)

5. 下载文件大小限制未实现(P1-3)

所有外部URL下载都没有大小上限,可能耗尽磁盘空间。


做得好的地方

  • P0-2 路径遍历:修复彻底,path_security.pyPath.resolve() + relative_to() 规范化校验,所有接入点(resolve_asset_path / PiP / 贴纸)都加固了
  • 防御层次:空字节检测、系统路径防护、扩展名校验、文件名sanitize都做了
  • 测试质量:56个单测全部通过,覆盖了主要攻击场景

📋 建议:补充核心下载点的SSRF防护和重定向防护后再合并。

完整复审报告已上传。

## 🔍 安全复审结果:⚠️ 有条件通过 ### 总体评价 PR在安全基础设施建设方面质量不错: - **url_security.py** 和 **path_security.py** 两个模块设计完善 - 单元测试覆盖全面(56个用例全部通过) - 路径遍历防护实现彻底 ✅ 但 **SSRF防护的接入点遗漏严重**,特别是原审计报告P0-1明确指出的3个TTS下载点一个都没修,等于P0级问题实质上没解决。 --- ### 🔴 必须修复(合并前) #### 1. TTS 3个下载点全部未接入SSRF防护(P0) 原审计报告P0-1明确指出的位置,一个都没修: - `packages/application/tts_job/workflow.py:100` — `_transfer_audio_to_oss()` httpx.get - `packages/application/tts_job/workflow.py:467` — 分段合成音频下载 httpx.get - `packages/application/tts_job/streaming_service.py:228` — `_download_audio()` httpx.get 都使用 `follow_redirects=True`,无任何SSRF校验。 #### 2. BGM下载点未接入SSRF防护(P0/P1) - `apps/worker/worker_app/tasks/generation.py:370` — BGM外部直链 `urlretrieve` - `apps/worker/worker_app/tasks/generation.py:407` — BGM预设库 `urlretrieve` - `apps/worker/worker_app/tasks/batch_download.py:112` — 批量下载HTTP回退 `urlretrieve` #### 3. 重定向防护缺失(P0) `url_security.py` 只校验初始URL,不校验重定向目标。所有 `follow_redirects=True` 或默认跟随重定向的下载点,都可能被302跳转到内网IP绕过SSRF。 **建议**:封装 `safe_download()` 函数,每步重定向都重新校验URL。 --- ### 🟡 建议修复 #### 4. 裸subprocess只修了3/8处(P1-1) 还剩:`asset_analyzer.py` (3处)、`ingest.py` (1处)、`voice_extraction.py` (1处)、`audio_merger.py` (1处) #### 5. 下载文件大小限制未实现(P1-3) 所有外部URL下载都没有大小上限,可能耗尽磁盘空间。 --- ### ✅ 做得好的地方 - **P0-2 路径遍历**:修复彻底,`path_security.py` 用 `Path.resolve() + relative_to()` 规范化校验,所有接入点(resolve_asset_path / PiP / 贴纸)都加固了 - **防御层次**:空字节检测、系统路径防护、扩展名校验、文件名sanitize都做了 - **测试质量**:56个单测全部通过,覆盖了主要攻击场景 --- ### 📋 建议:补充核心下载点的SSRF防护和重定向防护后再合并。 完整复审报告已上传。
xiaoxia added 1 commit 2026-07-14 15:12:40 +08:00
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xiaoxia added 1 commit 2026-07-14 15:12:41 +08:00
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xiaoxia added 1 commit 2026-07-14 15:12:44 +08:00
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xiaoxia added 1 commit 2026-07-14 15:20:22 +08:00
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3b80edd8c5
xiaoxia added 1 commit 2026-07-14 16:20:04 +08:00
fix: 渲染引擎安全加固P0+P1 补修第二轮
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334e2b1fc2
- SSRF漏接点补全:TTS 3个下载点 + BGM 3个下载点 全部接入 url_security.py 校验
  - TTS: workflow.py (_transfer_audio_to_oss, _download_and_merge_segments) + streaming_service.py (_download_audio)
  - BGM: generation.py (外部直链, 预设库) + batch_download.py (HTTP回退)
- 重定向防护:手动跟随重定向,每次跳转前重新校验目标 URL(禁用默认自动跟随)
- 文件大小/类型限制:新增 safe_download_file/safe_download_bytes,流式下载 + 大小上限 + MIME 白名单
- 裸 subprocess 补齐:5 处全部改走统一 run_ffmpeg/run_ffprobe
  - asset_analyzer.py: 3处 (ffprobe + 2个ffmpeg)
  - ingest.py: 1处 (ffprobe)
  - voice_extraction.py: 1处 (ffmpeg)
- URL安全模块迁移到 packages/shared/ 作为单一来源,worker 端保留向后兼容 re-export
- 新增 run_ffprobe 统一工具函数到 ffmpeg_utils
- 新增 7 个下载安全单测,累计 33 个 URL 安全测试
Author
Owner

🔍 二轮复审结果: 不通过

针对一轮复审提出的四大重点问题进行了逐一验证,结果如下:

📊 总体情况

重点 一轮状态 二轮状态 修复数
6处SSRF漏接点 0/6 0/6 0
重定向防护 未实现 未实现 0
5处裸subprocess 0/5 0/5 0
下载大小/类型限制 未实现 未实现 0

核心P0问题全部未修复,较一轮无实质进展。


1️⃣ SSRF漏接点(6处全部未修)

# 文件 位置 状态
1 tts_job/workflow.py:100 _transfer_audio_to_oss()
2 tts_job/workflow.py:467 分段合成下载
3 tts_job/streaming_service.py:228 _download_audio()
4 generation.py:370 BGM外部直链下载
5 generation.py:407 BGM预设库下载
6 batch_download.py:112 批量下载HTTP回退 新增

🆕 新增问题batch_download.py 是本轮PR新增文件,其中 _download_video_to_file() 的 HTTP 回退下载也无 SSRF 校验。

2️⃣ 重定向防护(完全未实现)

  • TTS 3处 httpx.get 全部 follow_redirects=True
  • BGM 3处 urlretrieve 默认跟随重定向
  • url_security.py 无重定向防护函数
  • 攻击路径:公网域名 302 → 内网IP/元数据服务,直接绕过 SSRF

3️⃣ 裸subprocess(5处全部未修)

一轮指出的 5 处裸调用全部未动:

  • asset_analyzer.py 3处(ffprobe/ffmpeg)
  • ingest.py 1处(ffprobe)
  • voice_extraction.py 1处(ffmpeg)

已修的 3 处(compose_video、edit_plan_generation、unified_render_service)保持完好。

4️⃣ 下载大小/类型限制(完全未实现)

  • 无大小上限(磁盘耗尽风险)
  • TTS 下载 resp.content 全量加载(OOM风险)
  • 无文件类型/MIME/魔数校验

保持完好的部分

  • path_security.py 路径遍历防护 (30/30 测试通过)
  • url_security.py SSRF框架 (26/26 测试通过)
  • 已修的 3 处 subprocess 统一

🔴 合并前必须修复(P0级)

  1. TTS 3个下载点接入 validate_url_safety
  2. BGM 2个下载点接入 validate_url_safety
  3. batch_download HTTP 回退接入 validate_url_safety
  4. 重定向防护:禁用 follow_redirects 或封装安全下载函数

详细报告已上传项目文档,搜索「PR317渲染引擎安全加固二轮复审报告」查看完整分析。


结论:P0 问题全部未修复,不建议合并。请补修后重新提交复审。

## 🔍 二轮复审结果:❌ 不通过 针对一轮复审提出的**四大重点问题**进行了逐一验证,结果如下: ### 📊 总体情况 | 重点 | 一轮状态 | 二轮状态 | 修复数 | |------|----------|----------|--------| | 6处SSRF漏接点 | ❌ 0/6 | ❌ 0/6 | 0 | | 重定向防护 | ❌ 未实现 | ❌ 未实现 | 0 | | 5处裸subprocess | ❌ 0/5 | ❌ 0/5 | 0 | | 下载大小/类型限制 | ❌ 未实现 | ❌ 未实现 | 0 | **核心P0问题全部未修复,较一轮无实质进展。** --- ### 1️⃣ SSRF漏接点(6处全部未修) | # | 文件 | 位置 | 状态 | |---|------|------|------| | 1 | `tts_job/workflow.py:100` | `_transfer_audio_to_oss()` | ❌ | | 2 | `tts_job/workflow.py:467` | 分段合成下载 | ❌ | | 3 | `tts_job/streaming_service.py:228` | `_download_audio()` | ❌ | | 4 | `generation.py:370` | BGM外部直链下载 | ❌ | | 5 | `generation.py:407` | BGM预设库下载 | ❌ | | 6 | `batch_download.py:112` | 批量下载HTTP回退 | ❌ **新增** | 🆕 **新增问题**:`batch_download.py` 是本轮PR新增文件,其中 `_download_video_to_file()` 的 HTTP 回退下载也无 SSRF 校验。 ### 2️⃣ 重定向防护(完全未实现) - TTS 3处 `httpx.get` 全部 `follow_redirects=True` - BGM 3处 `urlretrieve` 默认跟随重定向 - `url_security.py` 无重定向防护函数 - 攻击路径:公网域名 302 → 内网IP/元数据服务,直接绕过 SSRF ### 3️⃣ 裸subprocess(5处全部未修) 一轮指出的 5 处裸调用全部未动: - `asset_analyzer.py` 3处(ffprobe/ffmpeg) - `ingest.py` 1处(ffprobe) - `voice_extraction.py` 1处(ffmpeg) ✅ 已修的 3 处(compose_video、edit_plan_generation、unified_render_service)保持完好。 ### 4️⃣ 下载大小/类型限制(完全未实现) - 无大小上限(磁盘耗尽风险) - TTS 下载 `resp.content` 全量加载(OOM风险) - 无文件类型/MIME/魔数校验 --- ### ✅ 保持完好的部分 - `path_security.py` 路径遍历防护 ✅(30/30 测试通过) - `url_security.py` SSRF框架 ✅(26/26 测试通过) - 已修的 3 处 subprocess 统一 ✅ --- ### 🔴 合并前必须修复(P0级) 1. **TTS 3个下载点**接入 `validate_url_safety` 2. **BGM 2个下载点**接入 `validate_url_safety` 3. **batch_download HTTP 回退**接入 `validate_url_safety` 4. **重定向防护**:禁用 `follow_redirects` 或封装安全下载函数 > 详细报告已上传项目文档,搜索「PR317渲染引擎安全加固二轮复审报告」查看完整分析。 --- **结论:P0 问题全部未修复,不建议合并。请补修后重新提交复审。**
xiaoxia added 1 commit 2026-07-14 16:43:31 +08:00
fix: batch_download增加视频MIME类型白名单校验
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2f03e13928
- HTTP回退下载增加ALLOWED_VIDEO_MIME_TYPES白名单
- 包含application/octet-stream作为兜底兼容
- 6处外部下载全部接入大小+类型双重限制
Author
Owner

🔒 三轮安全复审结论 ⚠️ 有条件通过

验证 commit: 2f03e139
复审范围: 四大重点(6处SSRF / 重定向防护 / 5处裸subprocess / 下载大小类型限制)

📊 修复率总览

重点 修复率 状态
1. 6处SSRF下载点接入校验 6/6 全部修复
2. 重定向防护 完整实现 全部修复
3. 5处裸subprocess统一(worker侧) 5/5 全部修复
4. 下载大小/类型限制 6/6接入 全部接入

已修复的核心问题

1. SSRF防护(6/6)

  • TTS 3个下载点(workflow.py 2处 + streaming_service.py 1处)→ 全部接入 safe_download_bytes / safe_download_file
  • BGM 2个下载点(外部直链 + 预设库)→ 全部接入 safe_download_file
  • batch_download.py HTTP回退下载 → 接入 safe_download_file + 视频MIME白名单

2. 重定向防护

  • 采用最佳实践:NoRedirectHandler 禁用自动重定向 + 手动跟随 + 每跳重新校验URL + 5次上限
  • 统一封装在 safe_download_file / safe_download_bytes

3. 裸subprocess统一(5/5 worker侧)

  • asset_analyzer.py 3处 → run_ffprobe / run_ffmpeg
  • ingest.py 1处 → run_ffprobe
  • voice_extraction.py 1处 → run_ffmpeg
  • run_ffmpeg / run_ffprobe 本身安全:列表参数 + 无shell + 超时 + 统一日志

4. 下载大小/类型限制

  • 大小:默认 200MB,Content-Length预检 + 流式实时检查双重保障
  • 类型:音频/视频/图片三套 MIME 白名单
  • 6个下载点全部接入

⚠️ 遗留问题

P1(1个)

  • packages/application/tts_job/audio_merger.py:75 — 仍为裸 subprocess.run。列表参数无注入风险,但未接入统一 run_ffmpeg。可能因 packages 层无法引用 worker 模块,建议后续将 ffmpeg_utils 下沉到 packages/shared/

P2(2个)

  • _verify_url_accessible() HEAD请求默认跟随重定向,重定向目标未重新校验(仅HEAD,风险低)
  • 无文件头魔数校验,仅依赖Content-Type(纵深防御增强项)

🏗️ 架构亮点

  • url_security.py 已迁移至 packages/shared/ 作为单一来源,worker端为薄兼容层
  • 单元测试 63/63 全部通过(url_security 33 + path_security 30)

🎯 合并建议

建议有条件合并。 P0级问题全部清零,核心风险已解除。遗留P1/P2风险较低,可在后续迭代中完善。


三轮复审完成,详细报告见附件

## 🔒 三轮安全复审结论 ⚠️ 有条件通过 **验证 commit:** `2f03e139` **复审范围:** 四大重点(6处SSRF / 重定向防护 / 5处裸subprocess / 下载大小类型限制) ### 📊 修复率总览 | 重点 | 修复率 | 状态 | |------|--------|------| | 1. 6处SSRF下载点接入校验 | **6/6** | ✅ 全部修复 | | 2. 重定向防护 | 完整实现 | ✅ 全部修复 | | 3. 5处裸subprocess统一(worker侧) | **5/5** | ✅ 全部修复 | | 4. 下载大小/类型限制 | 6/6接入 | ✅ 全部接入 | ### ✅ 已修复的核心问题 **1. SSRF防护(6/6)** - TTS 3个下载点(`workflow.py` 2处 + `streaming_service.py` 1处)→ 全部接入 `safe_download_bytes` / `safe_download_file` - BGM 2个下载点(外部直链 + 预设库)→ 全部接入 `safe_download_file` - `batch_download.py` HTTP回退下载 → 接入 `safe_download_file` + 视频MIME白名单 **2. 重定向防护** - 采用最佳实践:`NoRedirectHandler` 禁用自动重定向 + 手动跟随 + 每跳重新校验URL + 5次上限 - 统一封装在 `safe_download_file` / `safe_download_bytes` 中 **3. 裸subprocess统一(5/5 worker侧)** - `asset_analyzer.py` 3处 → `run_ffprobe` / `run_ffmpeg` - `ingest.py` 1处 → `run_ffprobe` - `voice_extraction.py` 1处 → `run_ffmpeg` - `run_ffmpeg` / `run_ffprobe` 本身安全:列表参数 + 无shell + 超时 + 统一日志 **4. 下载大小/类型限制** - 大小:默认 200MB,Content-Length预检 + 流式实时检查双重保障 - 类型:音频/视频/图片三套 MIME 白名单 - 6个下载点全部接入 ### ⚠️ 遗留问题 **P1(1个)** - `packages/application/tts_job/audio_merger.py:75` — 仍为裸 `subprocess.run`。列表参数无注入风险,但未接入统一 `run_ffmpeg`。可能因 packages 层无法引用 worker 模块,建议后续将 `ffmpeg_utils` 下沉到 `packages/shared/`。 **P2(2个)** - `_verify_url_accessible()` HEAD请求默认跟随重定向,重定向目标未重新校验(仅HEAD,风险低) - 无文件头魔数校验,仅依赖Content-Type(纵深防御增强项) ### 🏗️ 架构亮点 - `url_security.py` 已迁移至 `packages/shared/` 作为单一来源,worker端为薄兼容层 ✅ - 单元测试 63/63 全部通过(url_security 33 + path_security 30)✅ ### 🎯 合并建议 **✅ 建议有条件合并。** P0级问题全部清零,核心风险已解除。遗留P1/P2风险较低,可在后续迭代中完善。 --- *三轮复审完成,详细报告见附件*
xiaoxia added 1 commit 2026-07-14 17:11:53 +08:00
fix: #317 CI修复 - asset_analyzer缩进 + TTS单测SSRF兼容
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745ea06659
P0-1: asset_analyzer.py 缩进错误
- 第147行起23行缩进多了一层(改subprocess时弄乱)
- 修正 streams/format_info/for循环 等缩进

P0-2: TTS单测因SSRF接入挂了8个
- 根因:测试mock httpx,但safe_download_*在发请求前做DNS解析
- 修复:将httpx mock替换为safe_download_bytes/safe_download_file mock
- test_tts_oss_transfer.py: 4个失败修复,mock safe_download_bytes
- test_tts_segment_synthesis.py: 3个失败修复,mock safe_download_file
- test_tts_streaming.py: 1个失败修复,mock safe_download_bytes
- 安全层单测保持独立,33个test_url_security.py全绿

76个相关测试全绿(9+24+10+33)
xiaoxia added 1 commit 2026-07-14 17:18:18 +08:00
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xiaoxia added 1 commit 2026-07-14 17:18:21 +08:00
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xiaoxia added 1 commit 2026-07-14 17:29:13 +08:00
style: fix isort import ordering
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xiaoxia added 1 commit 2026-07-14 17:29:15 +08:00
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xiaoxia added 1 commit 2026-07-14 17:29:15 +08:00
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xiaoxia added 1 commit 2026-07-14 17:42:25 +08:00
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xiaoxia added 1 commit 2026-07-14 17:42:25 +08:00
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xiaoxia added 1 commit 2026-07-14 17:52:01 +08:00
xiaoxia added 1 commit 2026-07-14 17:52:01 +08:00
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xiaoxia added 1 commit 2026-07-14 18:03:18 +08:00
style: fix isort import ordering (first-party grouping)
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xiaoxia added 1 commit 2026-07-14 18:03:21 +08:00
style: fix isort import ordering (first-party grouping)
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xiaoxia reviewed 2026-07-14 18:11:56 +08:00
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xiaoxia added 1 commit 2026-07-14 18:15:12 +08:00
Merge branch 'develop' into fix/render-engine-security-p0-p1
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b4b142180c
# Conflicts:
#	apps/worker/video_processing/path_security.py
xiaoxia merged commit c88be032c1 into develop 2026-07-14 18:15:21 +08:00
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