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chore: bump version to 0.3.0
Security: fix 3 critical RCE/privilege-escalation vulnerabilities, 6 high-priority reliability fixes, 105 real tests replacing stubs, 11 E2E tests with GDB interaction. Constraint: safety.py must integrate at runtime (was never imported before) Constraint: gdb.post_event() required for thread-safe GDB API calls Rejected: client-side safety_level override | privilege escalation risk Confidence: high Scope-risk: broad Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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CHANGELOG.md

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@@ -5,6 +5,31 @@ All notable changes to this project will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [0.3.0] - 2026-04-25
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### Security
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- Fix RCE via `exec` command: `python` command now blocked, `SafetyFilter` integrated at runtime
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- Fix RCE via `thread-apply`: zero safety filtering now enforced with `SafetyFilter.check_command()`
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- Fix privilege escalation: server now enforces session-configured `safety_level`, ignores client override
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### Added
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- Signal handlers (SIGTERM/SIGINT) for clean GDB child process cleanup
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- PID reuse detection via `psutil.Process(name)` cross-verification
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### Changed
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- All handler calls now routed through `gdb.post_event()` for thread safety
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- `_wait_for_socket` now checks GDB process health during polling
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### Fixed
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- FIFO/file descriptor leak in launcher exception paths
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- Heartbeat timeout now cleans up socket file before `os._exit()`
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- `SafetyFilter` path resolution in `handlers.py` (was pointing to wrong directory)
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### Tests
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- Rewrote `test_safety.py` (32 tests), `test_handlers.py` (20 tests), `test_session.py` (10 tests), `test_client.py` (11 tests) — previously all `pass` stubs
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- Added E2E test suite: `test_e2e_core_analysis.py`, `test_e2e_multithread.py`, `test_e2e_memory.py` (11 tests, skipped when GDB unavailable)
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- Added test infrastructure: `conftest.py` with pytest fixtures, `helpers.py` with test utilities
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## [0.2.0] - 2026-04-25
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### Added

ISSUES.md

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# GDB-CLI 项目缺陷报告
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调查日期:2026-04-25
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最后更新:2026-04-25(修复 9 个严重/高优先级问题)
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---
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## 已修复的严重问题
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### 1. ~~通过 `exec` 命令实现远程代码执行(RCE)~~ ✅ 已修复
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**文件:** `src/gdb_cli/safety.py:60``src/gdb_cli/gdb_server/handlers.py:35-45,567-576`
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**修复内容:**
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- `safety.py`: 将 `"python"` 加入 `FORBIDDEN_COMMANDS`
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- `handlers.py`: 动态导入 `SafetyFilter``SafetyLevel`,替换内联的危险命令检查
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- 修复了 `_safety_path` 路径错误(应为 `Path(_server_dir).parent / "safety.py"`
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### 2. ~~`handle_thread_apply` 零安全过滤~~ ✅ 已修复
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**文件:** `src/gdb_cli/gdb_server/handlers.py:788-796`
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**修复内容:**
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-`gdb.execute(command)` 之前添加 `SafetyFilter.check_command()` 调用
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### 3. ~~客户端控制的安全级别绕过服务端会话配置~~ ✅ 已修复
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**文件:** `src/gdb_cli/cli.py:345-359``src/gdb_cli/client.py:221-223``src/gdb_cli/gdb_server/gdb_rpc_server.py:279-280`
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**修复内容:**
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- `gdb_rpc_server.py`: 在 `_dispatch` 中强制使用 session 配置的 `safety_level`,忽略客户端传入的值
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- `cli.py`: 移除 `--safety-level` 选项
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- `client.py`: 移除 `exec_cmd()``safety_level` 参数
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---
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## 已修复的高优先级可靠性问题
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### 4. ~~PID 复用检测缺陷~~ ✅ 已修复
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**文件:** `src/gdb_cli/session.py:175-195`
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**修复内容:**
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- `_is_session_alive()``os.kill(pid, 0)` 之后使用 `psutil.Process(name)` 交叉验证进程名(psutil 不可用时优雅降级)
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### 5. ~~未注册信号处理器~~ ✅ 已修复
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**文件:** `src/gdb_cli/signal_handlers.py`(新建),`src/gdb_cli/cli.py:66`
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**修复内容:**
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- 创建 `signal_handlers.py` 模块,注册 SIGTERM/SIGINT 处理器
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-`cli.py``main()` 中调用 `setup_signal_handlers()`
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- 支持通过 `register_cleanup()` 注册自定义清理回调
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### 6. ~~启动器中异常路径下的 FIFO/文件描述符泄漏~~ ✅ 已修复
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**文件:** `src/gdb_cli/launcher.py:329-333,385-394`
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**修复内容:**
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- 添加 `_cleanup_fifo_if_exists()` 辅助函数
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-`FileNotFoundError` 和通用 `Exception` 处理器中调用 FIFO/fd 清理
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### 7. ~~`_wait_for_socket` 在 GDB 崩溃时阻塞整个超时时间~~ ✅ 已修复
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**文件:** `src/gdb_cli/launcher.py:397-409,387`
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**修复内容:**
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- `_wait_for_socket()` 接收可选的 `process` 参数
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- 每次轮询时检查 `process.poll()`,若 GDB 已退出则立即抛出 `GDBLauncherError`
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### 8. ~~Accept 线程中调用了 15 个以上 GDB API 的处理器~~ ✅ 已修复
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**文件:** `src/gdb_cli/gdb_server/gdb_rpc_server.py:248-298`
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**修复内容:**
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- 重构 `_dispatch()` 方法:所有 handler 调用通过 `gdb.post_event()` 路由到 GDB 主线程,使用 `queue.Queue` 同步获取结果
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- 添加 `import queue` 到模块引用
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### 9. ~~心跳超时使用 `os._exit(0)` 跳过清理~~ ✅ 已修复
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**文件:** `src/gdb_cli/gdb_server/gdb_rpc_server.py:331-347`
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**修复内容:**
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-`os._exit(0)` 之前添加 socket 文件清理(`self.sock_path.unlink()`
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---
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## 测试改进
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### 单元测试 ✅ 已实现
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| 文件 | 状态 | 测试数量 |
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|------|------|----------|
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| `tests/test_safety.py` | 从 pass stub 重写 | 32 |
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| `tests/test_handlers.py` | 从 pass stub 重写 | 20 |
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| `tests/test_session.py` | 从 pass stub 重写 | 10 |
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| `tests/test_client.py` | 从 pass stub 重写 | 11 |
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### E2E 测试 ✅ 已创建
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| 文件 | 测试类型 | 测试数量 |
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|------|---------|----------|
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| `tests/test_e2e_core_analysis.py` | Core dump 分析 | 4 |
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| `tests/test_e2e_multithread.py` | 多线程分析 | 3 |
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| `tests/test_e2e_memory.py` | 内存检查 | 4 |
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### 测试基础设施 ✅ 已创建
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| 文件 | 用途 |
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|------|------|
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| `tests/conftest.py` | pytest fixtures, GDB 可用性检查, crash binary 编译 |
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| `tests/helpers.py` | 辅助函数(编译、等待就绪、清理会话) |
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---
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## 中优先级问题
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| # | 问题 | 文件 | 状态 |
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|---|-------|------|------|
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| 10 | `GDB_CLI_SERVER_DIR` 默认值为 `/tmp`(全局可写,存在代码注入风险) | `handlers.py``gdb_rpc_server.py` | 待修复 |
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| 11 | 启动器 f-string 中的文件路径未清理(可注入 GDB 命令) | `launcher.py` | 待修复 |
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| 12 | Unix socket 无身份验证(任何本地进程均可连接) | `gdb_rpc_server.py` | 待修复 |
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| 13 | `handle_exec` 中的动态模块加载未进行空值检查 | `handlers.py``gdb_rpc_server.py` | 待修复 |
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| 14 | Backtrace 截断标志在范围超过帧数时计算错误 | `handlers.py` | 待修复 |
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| 15 | 通过 `all_frames.index(frame)` 实现的 O(n²) 帧号计算 | `handlers.py` | 待修复 |
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| 16 | `signal` 模块在首次使用之后才导入 | `session.py` | 待修复 |
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| 17 | `cleanup_session()` 发送 SIGTERM 后未执行 `waitpid` | `session.py` | 待修复 |
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| 18 | 服务器若从未调用 `set_ready()` 将永久卡在 `loading` 状态 | `gdb_rpc_server.py` | 待修复 |
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| 19 | 写入 `meta.json` 存在 TOCTOU 竞态条件(可能将 `gdb_pid` 置零) | `session.py` | 待修复 |
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| 20 | ~~`safety.py` 模块在运行时从未被调用~~ | `handlers.py` | ✅ 已修复 |
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| 21 | `_gdb_process` 动态属性在磁盘往返后丢失 | `launcher.py` | 待修复 |
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| 22 | 接收循环中的 O(n²) 字节拼接(10-50 MB) | `gdb_rpc_server.py``client.py` | 待修复 |
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---
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## 低优先级/边界情况问题
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| # | 问题 | 文件 |
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|---|-------|------|
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| 23 | `client.py` connect() 中的 TOCTOU socket 竞态 | `client.py:70-76` |
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| 24 | 截断的 8 字符会话 ID(32 位熵) | `session.py:73` |
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| 25 | 自定义异常类覆盖内建异常(`PermissionError``TimeoutError``ConnectionError`| `errors.py:76-109` |
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| 26 | 内存读取大小限制静默截断(无用户提示) | `handlers.py:1004-1010` |
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| 27 | value_formatter 中未处理 NaN/Infinity | `value_formatter.py:86-93` |
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| 28 | 大整数 JSON 精度丢失(> 2⁵³) | `value_formatter.py:153-160` |
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| 29 | `handle_registers` 中硬编码了 x86_64 寄存器名称 | `handlers.py:913-916` |
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| 30 | 弱远程地址验证正则表达式 | `cli.py:207-209` |
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| 31 | 内存/限制/帧号无负数验证 | `cli.py`(多处) |
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| 32 | 二进制文件/core 文件无文件存在性验证 | `cli.py:73-76` |
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| 33 | ~~测试文件为占位符(256 个测试定义中约 200 个仅包含 `pass`~~ ✅ 已修复 |
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| 34 | ~~无实际 GDB 交互的端到端测试~~ ✅ 已修复 |
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| 35 | `env_check.py` 中 i18n 未完成(TODO 注释) | `env_check.py:10-12` |
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| 36 | `formatters.py``heartbeat.py` 为空占位模块 | `formatters.py``heartbeat.py` |
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| 37 | ruff 目标版本 `py37``requires-python >=3.6.8` 不匹配 | `pyproject.toml` |
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---
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## 统计
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| 严重程度 | 数量 | 已修复 | 待修复 |
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|----------|------|--------|--------|
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| **严重** | 3 | 3 | 0 |
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| **** | 6 | 6 | 0 |
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| **** | 13 | 1 (#20) | 12 |
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| **** | 15 | 2 (#33, #34) | 13 |
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**已修复 12 个问题,共计 37 个已识别问题。**

pyproject.toml

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Original file line numberDiff line numberDiff line change
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
44

55
[project]
66
name = "gdb-cli"
7-
version = "0.2.0"
7+
version = "0.3.0"
88
description = "GDB CLI for AI - A thin client CLI with GDB built-in Python RPC Server"
99
readme = "README.md"
1010
license = {text = "Apache-2.0"}

src/gdb_cli/__init__.py

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
11
"""GDB CLI for AI - 瘦客户端 CLI + GDB 内置 Python RPC Server"""
22

33

4-
__version__ = "0.2.0"
4+
__version__ = "0.3.0"

src/gdb_cli/cli.py

Lines changed: 4 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -24,6 +24,7 @@
2424
from .client import GDBClient, GDBClientError, GDBCommandError
2525
from .i18n import t
2626
from .launcher import GDBLauncherError, launch_attach, launch_core, launch_target
27+
from .signal_handlers import setup_signal_handlers
2728
from .session import (
2829
cleanup_dead_sessions,
2930
find_session_by_core,
@@ -63,6 +64,7 @@ def get_client(session_id: str) -> GDBClient:
6364
@click.version_option(version=__version__)
6465
def main() -> None:
6566
"""GDB CLI for AI - Thin client CLI + GDB built-in Python RPC Server"""
67+
setup_signal_handlers()
6668
pass
6769

6870

@@ -345,12 +347,11 @@ def locals_cmd(session: str, thread_id: Optional[int], frame: int) -> None:
345347
@main.command("exec")
346348
@click.option("--session", "-s", required=True, help=t("cli.exec.session_help"))
347349
@click.argument("command")
348-
@click.option("--safety-level", default="readonly", help=t("cli.exec.safety_level_help"))
349-
def exec_cmd(session: str, command: str, safety_level: str) -> None:
350+
def exec_cmd(session: str, command: str) -> None:
350351
"""Execute raw GDB command"""
351352
try:
352353
with get_client(session) as client:
353-
result = client.exec_cmd(command, safety_level=safety_level)
354+
result = client.exec_cmd(command)
354355
print_json(result)
355356
except GDBCommandError as e:
356357
print_error(str(e), command)

src/gdb_cli/client.py

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -218,9 +218,9 @@ def locals(self, thread_id: Optional[int] = None, frame: int = 0) -> dict:
218218
params["thread_id"] = thread_id
219219
return self.call("locals", **params)
220220

221-
def exec_cmd(self, command: str, safety_level: str = "readonly") -> dict:
221+
def exec_cmd(self, command: str) -> dict:
222222
"""执行 GDB 命令"""
223-
return self.call("exec", command=command, safety_level=safety_level)
223+
return self.call("exec", command=command)
224224

225225
def status(self) -> dict:
226226
"""获取状态"""

src/gdb_cli/gdb_server/gdb_rpc_server.py

Lines changed: 31 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -7,6 +7,7 @@
77

88
import json
99
import os
10+
import queue
1011
import socket
1112
import threading
1213
import time
@@ -276,7 +277,30 @@ def _dispatch(self, request: dict) -> dict:
276277
# 注入 session 元数据
277278
params["_session_meta"] = self.session_meta
278279

279-
return handler(**params)
280+
# 强制使用 session 配置的安全级别,忽略客户端传入的值
281+
params["safety_level"] = self.session_meta.get("safety_level", "readonly")
282+
283+
# 通过 gdb.post_event() 将所有 handler 调用路由到 GDB 主线程
284+
result_queue: queue.Queue = queue.Queue()
285+
286+
def run_handler():
287+
try:
288+
result = handler(**params)
289+
result_queue.put(("ok", result))
290+
except Exception as e:
291+
result_queue.put(("error", str(e)))
292+
293+
gdb.post_event(run_handler)
294+
295+
try:
296+
status, result = result_queue.get(timeout=DEFAULT_COMMAND_TIMEOUT)
297+
except queue.Empty:
298+
raise RuntimeError(f"Command '{cmd}' timed out after {DEFAULT_COMMAND_TIMEOUT}s")
299+
300+
if status == "error":
301+
raise RuntimeError(str(result))
302+
303+
return result
280304

281305
def _start_heartbeat_timer(self) -> None:
282306
"""启动心跳超时定时器"""
@@ -316,7 +340,12 @@ def do_cleanup():
316340
gdb.execute("quit", to_string=True)
317341
except Exception as e:
318342
gdb.write(f"[GDBRPCServer] Cleanup error: {e}\n")
319-
# 强制退出
343+
# 清理 socket 文件后强制退出
344+
try:
345+
if self.sock_path.exists():
346+
self.sock_path.unlink()
347+
except Exception:
348+
pass
320349
import os
321350
os._exit(0)
322351

src/gdb_cli/gdb_server/handlers.py

Lines changed: 34 additions & 18 deletions
Original file line numberDiff line numberDiff line change
@@ -32,6 +32,18 @@
3232
DEFAULT_MAX_DEPTH = _value_formatter.DEFAULT_MAX_DEPTH
3333
DEFAULT_MAX_ELEMENTS = _value_formatter.DEFAULT_MAX_ELEMENTS
3434

35+
# 动态加载 safety(避免相对导入问题)
36+
_safety_path = Path(_server_dir).parent / "safety.py"
37+
if _safety_path.exists():
38+
_safety_spec = importlib.util.spec_from_file_location("safety", _safety_path)
39+
_safety = importlib.util.module_from_spec(_safety_spec)
40+
_safety_spec.loader.exec_module(_safety)
41+
SafetyFilter = _safety.SafetyFilter
42+
SafetyLevel = _safety.SafetyLevel
43+
SAFETY_AVAILABLE = True
44+
else:
45+
SAFETY_AVAILABLE = False
46+
3547

3648
def handle_eval(
3749
expr: str,
@@ -552,24 +564,16 @@ def handle_exec(
552564
if not GDB_AVAILABLE:
553565
return {"error": "GDB not available"}
554566

555-
# 安全检查 (详细实现在 safety.py)
556-
# 这里先做基本检查
557-
dangerous_commands = ["quit", "kill", "shell", "python-interactive"]
558-
cmd_lower = command.lower().strip()
559-
560-
for dangerous in dangerous_commands:
561-
if cmd_lower.startswith(dangerous):
562-
return {"error": f"Command '{dangerous}' is not allowed", "command": command}
563-
564-
# 写操作检查
565-
write_commands = ["set", "call", "return"]
566-
if safety_level == "readonly":
567-
for write_cmd in write_commands:
568-
if cmd_lower.startswith(write_cmd):
569-
return {
570-
"error": f"Command '{write_cmd}' requires --allow-write",
571-
"command": command
572-
}
567+
# 使用 SafetyFilter 进行安全检查
568+
if SAFETY_AVAILABLE:
569+
try:
570+
level = SafetyLevel(safety_level)
571+
except ValueError:
572+
level = SafetyLevel.READONLY
573+
sf = SafetyFilter(level)
574+
allowed, reason = sf.filter_command(command)
575+
if not allowed:
576+
return {"error": reason or f"Command not allowed", "command": command}
573577

574578
try:
575579

@@ -777,6 +781,18 @@ def handle_thread_apply(
777781
else:
778782
return {"error": "Specify --all or --threads list"}
779783

784+
# 安全检查:使用 SafetyFilter 过滤命令
785+
if SAFETY_AVAILABLE:
786+
safety_level_str = kwargs.get("safety_level", "readonly")
787+
try:
788+
level = SafetyLevel(safety_level_str)
789+
except ValueError:
790+
level = SafetyLevel.READONLY
791+
sf = SafetyFilter(level)
792+
allowed, reason = sf.filter_command(command)
793+
if not allowed:
794+
return {"error": reason or f"Command not allowed", "command": command}
795+
780796
results = []
781797
orig_thread = gdb.selected_thread()
782798

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