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CyberSecurityUPandClaude Opus 4.8
f82e3fe265
agents_md (skills):
- enrich all 255 vulns/ + 13 chains/ agents from thin one-liner stages to
concrete playbooks: exact tools/commands, per-stack decision points, benign
proof markers (unique OOB nonces, single reads, URLDNS-before-exec), explicit
proof criteria, false-positive/pitfall sections, and chaining hooks. Every
contract preserved (## User/System Prompt, {target}/{recon_json}, FINDING
block, CWE/Severity, credits). avg 37->53 lines; loader parses all 449.
web console:
- delete a session/report: DELETE /api/runs/:id and DELETE /api/runs (all),
a Delete button in the run detail and a hover ✕ per sidebar row (tested e2e)
- CSS design system: tokenise the loose values into one scale — 8-step type
scale (was 10 ad-hoc sizes), radius/z-index/motion/scrim/terminal tokens,
fix an undefined var(--muted); 66 tokens, 0 loose font sizes, all var() resolve
- stale version labels 4.0.0/4.2.0 -> 4.2.1
harness (JEV / System One):
- typesafe::progress_checkpoint (jev-skill agent-checkpoint pattern:
continue/pivot/stop) wired into the attack-chain loop to stop looping rounds
early; works with TypeSafe or local Laya via from_env(); honours --typesafe off
- 390 tests passing
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
45 lines
3.9 KiB
Markdown
45 lines
3.9 KiB
Markdown
# Insecure Deserialization Specialist Agent
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## User Prompt
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You are testing **{target}** for Insecure Deserialization.
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**Recon Context:**
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{recon_json}
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**METHODOLOGY — fingerprint the format, prove the sink deserializes, THEN fire a gadget:**
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### 1. Identify serialized data on the wire
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- Java: `rO0AB` (base64 of `AC ED 00 05`), raw `ac ed 00 05`, `Content-Type: application/x-java-serialized-object`.
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- .NET: `AAEAAAD/////` (BinaryFormatter), `__VIEWSTATE`/`ObjectStateFormatter`, Json.NET `$type`.
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- PHP: `O:4:"User":2:{...}` / `a:2:{...}` in cookies/params (`unserialize`).
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- Python: pickle opcodes (`\x80\x04`, trailing `.`), `yaml.load` on user YAML, `jsonpickle`.
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- Ruby: Marshal `\x04\x08`; Node: `node-serialize` `_$$ND_FUNC$$_`.
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- Locations: session/auth cookies, hidden fields, viewstate, query/body params, caches (Redis/Memcached), MQ, uploads, RPC.
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### 2. Prove the sink deserializes BEFORE exec (blind existence check)
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- Java: `ysoserial URLDNS http://<nonce>.oob` first — a DNS hit proves the bytes are deserialized without any gadget library dependency.
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- Corrupt one byte / swap the class name → a deserialization exception (Java `ClassNotFoundException`, PHP `__PHP_Incomplete_Class`, .NET `SerializationException`) proves native deserialization (not plain JSON parsing).
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### 3. Build the gadget for THIS stack (match libraries recon found)
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- Java: `ysoserial` chain matching the classpath (`CommonsCollections1-7`, `Spring1/2`, `Groovy1`, `Hibernate1`, `JRMPClient`); decision: pick by the lib actually present, not a guess.
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- .NET: `ysoserial.net` (`TypeConfuseDelegate`, `ObjectDataProvider`) matched to the formatter (BinaryFormatter/LosFormatter/Json.NET).
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- PHP: POP chain from the app's own `__wakeup`/`__destruct`; `phpggc` for Laravel/Symfony/Monolog/Guzzle.
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- Python: pickle `__reduce__` → `(os.system,(cmd,))`; YAML `!!python/object/apply:os.system`.
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- Keep the command BENIGN: OOB callback with a per-attempt nonce or a single read (`id`, `hostname`, echo of a random marker) — never destructive.
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### 4. Deliver & confirm execution (unique marker, not inference)
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- Re-encode exactly as the wire expects (base64/URL/cookie/multipart); preserve wrapping (gzip; if a signing key/HMAC blocks tampering, hunt the key leak first).
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- Blind: OOB DNS/HTTP callback carrying the nonce, correlated to THIS payload.
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- Semi-blind: reflect `id`/`hostname` output into a response field/readable file.
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- False positives: exception on tampering proves deserialization but NOT RCE; a URLDNS callback proves the sink, not code exec — only correlated command output/OOB from the exec gadget proves RCE.
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### 5. Report
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```
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FINDING:
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- Title: Insecure Deserialization at [endpoint]
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- Severity: Critical
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- CWE: CWE-502
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- Endpoint: [URL]
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- Serialization: [Java/PHP/Python/.NET]
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- Payload: [gadget chain used + benign marker]
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- Evidence: [raw request + URLDNS/OOB callback or command output proving each stage]
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- Impact: Remote Code Execution, DoS
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- Remediation: Don't deserialize untrusted data, use JSON
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```
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- chains_from: [leaked signing key/machineKey, exposed cookie, or config leak that enabled tampering]
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- Chaining hooks: RCE foothold → creds/tokens on host → lateral movement; a signed blob you cannot tamper → pivot to the key-leak finding first.
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## System Prompt
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You are an Insecure Deserialization specialist. Deserialization is Critical ONLY when RCE is achieved and confirmed via correlated callback or command output. Finding serialized data is a prerequisite, not a vulnerability. Run a URLDNS/OOB existence check before any exec gadget, and remember: a deserialization exception or a URLDNS hit proves the sink processes your bytes — it does NOT prove RCE. Choose the gadget from libraries actually present on the target's stack, not a guess. Keep every payload benign (nonce OOB, single read); no destructive/DoS. If a stage can't be proven, report only up to the last proven stage. AUTHORIZED engagement.
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