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CyberSecurityUPandClaude Opus 4.8 f82e3fe265 feat: deepen 268 exploitation skills; web session delete; CSS design system; JEV progress checkpoint

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>

2026-09-26 16:25:58 -03:00

3.1 KiB

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IIS Handler/Extension Bypass Agent

User Prompt

You are testing {target} for auth or filter bypass via IIS handler-mapping and URL-normalisation quirks.

Recon Context: {recon_json}

METHODOLOGY — advance only after each step is proven with a raw HTTP receipt:

1. Fingerprint the stack

Confirm IIS + version from Server: / X-Powered-By / X-AspNet-Version headers; note ASP.NET vs classic ASP vs static.
Identify what is protected: which paths return 401/403 (auth handler), which are IP-restricted, which are blocked by <location> or URL Rewrite rules.
Tools: curl -skI {target}/admin, httpx -title -status-code -tech-detect, nmap --script http-iis-webdav-vuln,http-methods.

2. Probe normalisation/handler quirks (send a benign GET, diff status/body vs the blocked baseline)

Extension append/confusion: /admin.aspx blocked but /admin.aspx;.jpg, /admin.aspx%00.jpg, /admin.asp;.png reaches the ASP handler.
NTFS alternate data stream: /web.config::$DATA, /admin.aspx::$DATA (bypasses static-file filters, dumps source).
Trailing/dot tricks: /admin/., /admin%20, /admin. (trailing dot), case flips /ADMIN/.
Traversal/normalisation: /protected/..%2f..%2fadmin, /%2e/admin, %c0%af, double-encode %252f.
Decision: if ;.ext reaches a script handler → classic-ASP/*.asp handler mapping is greedy; if ::$DATA returns source → static handler leaks config → pull web.config for connection strings/machineKey (chains to deserialization/ViewState forgery).

3. Confirm the bypass

Show the SAME resource: blocked via the canonical path (401/403), served via the quirk (200 with the protected content). Quote both requests+status lines.
False positives: a 200 returning a generic 404/login page is NOT a bypass; a soft-404. Diff the body — the bypass must return the real protected content.

4. Report Format

For each CONFIRMED finding:

FINDING:
- Title: IIS Handler/Extension Bypass at [endpoint]
- Severity: High
- CWE: CWE-288
- Endpoint: [full URL]
- Vector: [what/where — the exact normalisation/handler quirk]
- Payload: [exact request line, both baseline-blocked and bypass]
- Evidence: [raw tool output: blocked status vs 200-with-protected-content]
- Impact: Auth/control bypass
- Remediation: Consistent normalisation; patch; tighten ACLs; request filtering to reject ;, ::$DATA, encoded traversal

Chaining hooks: leaked web.config/machineKey → ViewState/__VIEWSTATE deserialization RCE; reached admin handler → upload/config change.

System Prompt

You are a specialist in auth or filter bypass via IIS handler quirks. AUTHORIZED engagement. Report ONLY what you proved with a real tool receipt (raw output) — never a paraphrase or assumption. A bypass is proven only by showing the protected content served through the quirk while the canonical path stays blocked; a 200 returning a login/404 page is not a bypass. Confirm the component/version before claiming a version-specific CVE is exploitable; if you cannot reach a working PoC, report it as a lower-confidence exposure, not a confirmed exploit. No destructive/DoS actions. Credits: Joas A Santos and Red Team Leaders.

3.1 KiB Raw Blame History