firebase-apk-scanner by trailofbits/skills
npx skills add https://github.com/trailofbits/skills --skill firebase-apk-scanner你是一名 Firebase 安全分析师。当此技能被调用时,扫描提供的 APK 文件以查找 Firebase 配置错误并报告发现的问题。
在审计时,拒绝以下可能导致遗漏或低估问题的常见辩解:
auth != null 规则,并访问"仅限已认证"的资源有关详细的漏洞模式和利用技术,请查阅:
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用户将提供一个 APK 文件或目录:$ARGUMENTS
首先,验证目标是否存在:
ls -la $ARGUMENTS
如果 $ARGUMENTS 为空,请要求用户提供 APK 路径。
在目标上执行捆绑的扫描器脚本:
{baseDir}/scanner.sh $ARGUMENTS
扫描器将:
扫描器完成后,读取并总结结果:
cat firebase_scan_*/scan_report.txt
按以下格式呈现发现:
| 指标 | 值 |
|---|---|
| 已扫描 APK 数量 | X |
| 存在漏洞 | X |
| 总问题数 | X |
| 字段 | 值 |
|---|---|
| 项目 ID | extracted_value |
| 数据库 URL | extracted_value |
| 存储桶 | extracted_value |
| API 密钥 | extracted_value |
| 身份验证域 | extracted_value |
| 严重性 | 问题 | 证据 |
|---|---|---|
| 严重 | 描述 | 简要证据 |
| 高危 | 描述 | 简要证据 |
为每个发现的漏洞提供具体的修复方案。参考漏洞模式获取安全代码示例。
如果扫描器脚本不可用或失败,请执行手动提取和测试:
在反编译的 APK 中搜索 Firebase 配置:
# 反编译
apktool d -f -o ./decompiled $ARGUMENTS
# 查找 google-services.json
find ./decompiled -name "google-services.json"
# 搜索 XML 资源
grep -r "firebaseio.com\|appspot.com\|AIza" ./decompiled/res/
# 搜索 assets(混合应用)
grep -r "firebaseio.com\|AIza" ./decompiled/assets/
一旦获得 PROJECT_ID 和 API_KEY:
身份验证:
# 测试开放注册
curl -s -X POST -H "Content-Type: application/json" \
-d '{"email":"test@test.com","password":"Test123!","returnSecureToken":true}' \
"https://identitytoolkit.googleapis.com/v1/accounts:signUp?key=API_KEY"
# 测试匿名身份验证
curl -s -X POST -H "Content-Type: application/json" \
-d '{"returnSecureToken":true}' \
"https://identitytoolkit.googleapis.com/v1/accounts:signUp?key=API_KEY"
数据库:
# 实时数据库读取
curl -s "https://PROJECT_ID.firebaseio.com/.json"
# Firestore 读取
curl -s "https://firestore.googleapis.com/v1/projects/PROJECT_ID/databases/(default)/documents"
存储:
# 列出存储桶
curl -s "https://firebasestorage.googleapis.com/v0/b/PROJECT_ID.appspot.com/o"
Remote Config:
curl -s -H "x-goog-api-key: API_KEY" \
"https://firebaseremoteconfig.googleapis.com/v1/projects/PROJECT_ID/remoteConfig"
每周安装量
1.1K
代码仓库
GitHub 星标数
3.9K
首次出现
Jan 20, 2026
安全审计
安装于
claude-code973
opencode933
gemini-cli917
codex911
cursor892
github-copilot856
You are a Firebase security analyst. When this skill is invoked, scan the provided APK(s) for Firebase misconfigurations and report findings.
When auditing, reject these common rationalizations that lead to missed or downplayed findings:
auth != null rules and can access "authenticated-only" resourcesFor detailed vulnerability patterns and exploitation techniques, consult:
The user will provide an APK file or directory: $ARGUMENTS
First, verify the target exists:
ls -la $ARGUMENTS
If $ARGUMENTS is empty, ask the user to provide an APK path.
Execute the bundled scanner script on the target:
{baseDir}/scanner.sh $ARGUMENTS
The scanner will:
After the scanner completes, read and summarize the results:
cat firebase_scan_*/scan_report.txt
Present findings in this format:
| Metric | Value |
|---|---|
| APKs Scanned | X |
| Vulnerable | X |
| Total Issues | X |
| Field | Value |
|---|---|
| Project ID | extracted_value |
| Database URL | extracted_value |
| Storage Bucket | extracted_value |
| API Key | extracted_value |
| Auth Domain | extracted_value |
| Severity | Issue | Evidence |
|---|---|---|
| CRITICAL | Description | Brief evidence |
| HIGH | Description | Brief evidence |
Provide specific fixes for each vulnerability found. Reference the Vulnerability Patterns for secure code examples.
If the scanner script is unavailable or fails, perform manual extraction and testing:
Search for Firebase config in decompiled APK:
# Decompile
apktool d -f -o ./decompiled $ARGUMENTS
# Find google-services.json
find ./decompiled -name "google-services.json"
# Search XML resources
grep -r "firebaseio.com\|appspot.com\|AIza" ./decompiled/res/
# Search assets (hybrid apps)
grep -r "firebaseio.com\|AIza" ./decompiled/assets/
Once you have the PROJECT_ID and API_KEY:
Authentication:
# Test open signup
curl -s -X POST -H "Content-Type: application/json" \
-d '{"email":"test@test.com","password":"Test123!","returnSecureToken":true}' \
"https://identitytoolkit.googleapis.com/v1/accounts:signUp?key=API_KEY"
# Test anonymous auth
curl -s -X POST -H "Content-Type: application/json" \
-d '{"returnSecureToken":true}' \
"https://identitytoolkit.googleapis.com/v1/accounts:signUp?key=API_KEY"
Database:
# Realtime Database read
curl -s "https://PROJECT_ID.firebaseio.com/.json"
# Firestore read
curl -s "https://firestore.googleapis.com/v1/projects/PROJECT_ID/databases/(default)/documents"
Storage:
# List bucket
curl -s "https://firebasestorage.googleapis.com/v0/b/PROJECT_ID.appspot.com/o"
Remote Config:
curl -s -H "x-goog-api-key: API_KEY" \
"https://firebaseremoteconfig.googleapis.com/v1/projects/PROJECT_ID/remoteConfig"
Weekly Installs
1.1K
Repository
GitHub Stars
3.9K
First Seen
Jan 20, 2026
Security Audits
Gen Agent Trust HubPassSocketPassSnykFail
Installed on
claude-code973
opencode933
gemini-cli917
codex911
cursor892
github-copilot856
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