decx-report

DECX - Report Generation

Use this skill only for report writing from existing finalized finding records in the evidence graph.

Routing Gate

Use only when the user asks for a report from existing DECX finalized findings or residual candidate summaries. Query the evidence graph with node scripts/decx-analysis-db.mjs. Do not use for vulnerability discovery, chain tracing, PoC construction, or generic security-report templates. If no finalized findings exist, route back to the relevant vulnhunt skill.

Input: Read Findings from Proof Graph

# All complete evidence chains
node scripts/decx-analysis-db.mjs chains <dir> --root-prefix entrypoint --leaf-prefix impact

# Single chain detail
node scripts/decx-analysis-db.mjs path <dir> --from <entrypoint_fact> --to <sink_fact>
node scripts/decx-analysis-db.mjs ancestors <dir> --fact <sink_fact>

# Full graph export
node scripts/decx-analysis-db.mjs export <dir>

# Unresolved intents (residual section)
node scripts/decx-analysis-db.mjs intents <dir> --status open

# Re-fetch minimal source for evidence quotes
decx code method-source "<method>" -P <port>

Determine target kind from fact prefixes: service-entrypoint or binder-reachability → framework; otherwise app.

Rules

Rule	Rationale
Report only chains proven via path or chains queries	unproven chains are not findings
Keep unresolved intents in residual section	open intents are not confirmed issues
Never write verified / runtime-validated / poc-validated	report mirrors DB state; promotion is vulnhunt's job
Do not invent missing guards, call-chain nodes, impact, or bypass conditions	fabricated evidence fails review
Default language: Chinese (zh); English/bilingual only when explicitly requested	language contract
Prefer HTML output; Markdown only when requested or environment requires it	output contract
Minimal source citations only; no full DB dumps	context + artifact hygiene
Anchors (findingId / sourceId-sinkId-flowSig) must match between HTML and Markdown	cross-format integrity

Report Semantics

Chain origin by target kind:

• App (entrypoint prefix): start from exported component callback (Activity onCreate/onNewIntent, Receiver onReceive, Provider query/insert/update/delete/call, Service onBind/onStartCommand). NOT from AttackerApp.*, bindService, startActivity, sendBroadcast, ContentResolver.*, adb, or PoC driver.
• Framework (service-entrypoint/binder-reachability prefix): start from Binder service / Stub / manager facade entry. Include identity + authorization at trust boundary (identity + permission-guard/appop-guard/user-guard).
• Attacker actions belong only in Attack Path.

Four sections per finding (equal visual weight, each <section> with <h2>):

1. 目标情况 — one-line context + meta-row (component/permission/process)
2. 问题说明 — vulnerability description + 4-step call-chain card (入口 → 可控 → 保护 → Sink) with inline edge labels + consolidated pre evidence
3. 组合链利用 — cross-finding composition analysis (see below)
4. 安全建议与修复 — remediation in .fix callout

组合链利用 must contain:

1. 组合分析 — which findings compose, edge type (enable/carry/amplify/bypass), why realistic
2. 效果比较表 — [路径, 攻击步骤数, 是否需要暴破, 最终获取]
3. 完整攻击路径 — full composed chain steps with F-number references
4. 真实影响 — what changes after composition vs standalone

When a finding cannot compose: show dead-end notice with reason. Do not skip composition analysis — explain which compositions were evaluated and rejected.

Output Contract

Default: report.html — standalone HTML with inline CSS, no remote resources, residual candidates in separate section.

Optional: report.md only when requested. Content semantically identical to HTML.

Templates: assets/report-template-html.html, optional assets/report-template-zh.md, assets/report-template-en.md.

Gotchas

• Starting chain with attacker actions: chain starts at victim entrypoint, not AttackerApp.* or PoC driver
• Promoting candidates: candidate results stay in residual section
• Fabricating guard evidence: re-query decx code method-source on exact signature, do not infer from training data
• Mixing chain-origin rules: app starts at component callback; framework starts at Binder/Stub facade
• Omitting framework identity evidence: framework findings need identity + guard facts at trust boundary

References

• assets/report-template-html.html
• assets/report-template-zh.md (optional)
• assets/report-template-en.md (optional)