CWE-246 Variante Brouillon

J2EE Bad Practices: Direct Use of Sockets

This vulnerability occurs when a J2EE application creates network sockets directly, bypassing the container-managed communication framework provided by the platform.

Définition

What is CWE-246?

This vulnerability occurs when a J2EE application creates network sockets directly, bypassing the container-managed communication framework provided by the platform.
The J2EE specification restricts direct socket use primarily for connecting to legacy systems when no higher-level alternative exists. When developers implement custom network protocols or even re-implement standard ones, they must solve complex security challenges—like proper authentication, encryption, and input validation—that are already handled by the platform's tested frameworks. Without deep security expertise, these custom solutions often introduce critical flaws that attackers can exploit. Managing this at scale is difficult; an ASPM like Plexicus can help you track and remediate these flaws across your entire stack. While SAST tools can flag the direct socket usage pattern, Plexicus uses AI to analyze the context and suggest the specific framework-based code fix, such as replacing raw sockets with a managed service, saving hours of manual investigation and rewrite.
Impact réel

Real-world CVEs caused by CWE-246

Aucune référence CVE publique n'est liée à ce CWE dans le catalogue MITRE pour le moment.

Comment les attaquants l'exploitent

Parcours de l'attaquant étape par étape

  1. 1

    Identifier un chemin de code qui traite des entrées non fiables sans validation.

  2. 2

    Élaborer une charge utile qui exploite le comportement non sécurisé — injection, traversal, débordement ou abus de logique.

  3. 3

    Délivrer la charge utile via une requête normale et observer la réaction de l'application.

  4. 4

    Itérer jusqu'à ce que la réponse divulgue des données, exécute le code de l'attaquant ou élève les privilèges.

Exemple de code vulnérable

Vulnerable Java

The following example opens a socket to connect to a remote server.

Vulnérable Java
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
```
// Perform servlet tasks.* 
  		...
  		
  		
  		 *// Open a socket to a remote server (bad).* 
  		Socket sock = null;
  		
  		try {
  		```
  				sock = new Socket(remoteHostname, 3000);
```
// Do something with the socket.* 
  				...} catch (Exception e) {
  		```
  			...
  		}
  }
Exemple de code sécurisé

Secure pseudo

Sécurisé pseudo
// Validate, sanitize, or use a safe API before reaching the sink.
function handleRequest(input) {
  const safe = validateAndEscape(input);
  return executeWithGuards(safe);
}
What changed: the unsafe sink is replaced (or the input is validated/escaped) so the same payload no longer triggers the weakness.
Liste de contrôle de prévention

How to prevent CWE-246

  • Architecture and Design Use framework method calls instead of using sockets directly.
Signaux de détection

How to detect CWE-246

Automated Static Analysis High

Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)

CWE-246

Don't catalog this weakness. Prove it's reachable.

Plexicus turns CWE catalogs into evidence: every CWE-pattern is matched against your real code graph, reach is proven on a sandbox clone, and verified findings ship as reviewed PRs.

Questions fréquentes

Frequently asked questions

Qu'est-ce que CWE-246 ?

This vulnerability occurs when a J2EE application creates network sockets directly, bypassing the container-managed communication framework provided by the platform.

Quelle est la gravité de CWE-246 ?

MITRE n'a pas publié de note de probabilité d'exploitation pour cette faiblesse. Traitez-la comme un impact moyen jusqu'à ce que votre modèle de menace prouve le contraire.

Quels langages ou plateformes sont affectés par CWE-246 ?

MITRE lists the following affected platforms: Java.

Comment puis-je prévenir CWE-246 ?

Use framework method calls instead of using sockets directly.

Comment Plexicus détecte et corrige CWE-246 ?

Le moteur SAST de Plexicus reconnaît la signature de flux de données de CWE-246 à chaque commit. Lorsqu'une correspondance est trouvée, notre agent Codex Remedium ouvre une PR de correction avec le code corrigé, les tests et un résumé d'une ligne pour le relecteur.

Où puis-je en savoir plus sur CWE-246 ?

MITRE publie la définition canonique à https://cwe.mitre.org/data/definitions/246.html. Vous pouvez également consulter la documentation OWASP et NIST pour des conseils adjacents.

Prêt à valider l'essentiel ?

Prêt à valider ce qui compte.

Plexicus est Proof-Driven AppSec : findings validés, compréhension contextuelle et remédiation relue — ancrée dans la preuve, scopée avec vous.

Qualification

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0 / 280

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SAMPLE HANDOVER · ILLUSTRATIVE

Sample evidence handover

A trimmed view of what your team receives at the end of an AI Swarm Pentest engagement. Real engagements include full technical evidence, executive narrative, and a remediation plan.

VALIDATED FINDING Evidence attached

Server-Side Request Forgery in webhooks/receiver

demo-project/sample-app · src/webhooks/receiver.py:42

SeverityHigh CVSS 3.18.6 Priority79 Confirmedvia replay

Untrusted caller-supplied URLs reach an internal egress without an allowlist. Replayed in a sandbox against a fresh authorized target — the same control was validated to fail twice.

REVIEWER-READY REMEDIATION Merge-ready PR

Validate the target URL against an allowlist of permitted hostnames. Reject private/internal IP ranges. Enforce HTTPS only.

plexicus/remediation/webhooks-ssrf 3 changed · 0 new files
42resp = requests.get(target_url)
42+if not is_allowed_host(target_url):
43+  raise WebhookRejected(target_url)
44+resp = requests.get(target_url, timeout=5)
Every engagement hands over:
  • Executive briefing
  • Validated findings list
  • Merge-ready PRs
  • Compliance mapping (NIS2 · DORA · CRA)
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