CWE-653 Classe Brouillon

Improper Isolation or Compartmentalization

This vulnerability occurs when an application fails to enforce strong boundaries between components that operate at different security levels, allowing lower-privileged functions to improperly…

Définition

What is CWE-653?

This vulnerability occurs when an application fails to enforce strong boundaries between components that operate at different security levels, allowing lower-privileged functions to improperly interact with higher-privileged ones.
At its core, this weakness breaks a fundamental security principle: components with different trust levels should be kept separate. When an application doesn't properly isolate features, data, or processes, a flaw in a low-privilege area can create a bridge that attackers use to reach sensitive, high-privilege areas. Think of it like a building where a broken lock on a janitor's closet somehow gives access to the entire executive suite. For developers, this means that even a minor bug in a user-facing feature can escalate into a major breach if strong compartmentalization isn't in place. To prevent this, you must design clear security boundaries—using mechanisms like process separation, sandboxing, or strict access controls—to ensure that a compromise in one module is contained and cannot spread to more critical parts of the system.
Impact réel

Real-world CVEs caused by CWE-653

  • CVE-2021-33096

    Improper isolation of shared resource in a network-on-chip leads to denial of service

  • CVE-2019-6260

    Baseboard Management Controller (BMC) device implements Advanced High-performance Bus (AHB) bridges that do not require authentication for arbitrary read and write access to the BMC's physical address space from the host, and possibly the network [REF-1138].

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 pseudo

MITRE n'a pas publié d'exemple de code pour ce CWE. Le motif ci-dessous est illustratif — voir Ressources pour les références canoniques.

Vulnérable pseudo 
// Example pattern — see MITRE for the canonical references.
function handleRequest(input) {
  // Untrusted input flows directly into the sensitive sink.
  return executeUnsafe(input);
}
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-653

  • Architecture and Design Break up privileges between different modules, objects, or entities. Minimize the interfaces between modules and require strong access control between them.
Signaux de détection

How to detect CWE-653

Automated Static Analysis - Binary or Bytecode SOAR Partial

According to SOAR, the following detection techniques may be useful: ``` Cost effective for partial coverage: ``` Compare binary / bytecode to application permission manifest

Manual Static Analysis - Source Code High

According to SOAR, the following detection techniques may be useful: ``` Highly cost effective: ``` Manual Source Code Review (not inspections) ``` Cost effective for partial coverage: ``` Focused Manual Spotcheck - Focused manual analysis of source

Architecture or Design Review High

According to SOAR, the following detection techniques may be useful: ``` Highly cost effective: ``` Inspection (IEEE 1028 standard) (can apply to requirements, design, source code, etc.) Formal Methods / Correct-By-Construction ``` Cost effective for partial coverage: ``` Attack Modeling

Correction automatique Plexicus

Plexicus détecte automatiquement CWE-653 et ouvre une PR de correction en moins de 60 secondes.

Codex Remedium analyse chaque commit, identifie cette faiblesse précise et livre une pull request prête à être relue avec le correctif. Pas de tickets. Pas de transferts.

Obtenir une démo Essayer Plexicus gratuitement
Questions fréquentes

Frequently asked questions

Qu'est-ce que CWE-653 ?

This vulnerability occurs when an application fails to enforce strong boundaries between components that operate at different security levels, allowing lower-privileged functions to improperly interact with higher-privileged ones.

Quelle est la gravité de CWE-653 ?

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-653 ?

MITRE n'a pas spécifié les plateformes affectées pour ce CWE — il peut s'appliquer à la plupart des stacks applicatives.

Comment puis-je prévenir CWE-653 ?

Break up privileges between different modules, objects, or entities. Minimize the interfaces between modules and require strong access control between them.

Comment Plexicus détecte et corrige CWE-653 ?

Le moteur SAST de Plexicus reconnaît la signature de flux de données de CWE-653 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-653 ?

MITRE publie la définition canonique à https://cwe.mitre.org/data/definitions/653.html. Vous pouvez également consulter la documentation OWASP et NIST pour des conseils adjacents.

Faiblesses associées

Weaknesses related to CWE-653

CWE-657 Parent

Violation of Secure Design Principles

This weakness occurs when a system's architecture or design fails to follow fundamental security principles, creating a flawed foundation…

CWE-1192 Frère

Improper Identifier for IP Block used in System-On-Chip (SOC)

This weakness occurs when a System-on-Chip (SoC) lacks a secure, unique, and permanent identifier for its internal hardware components (IP…

CWE-1395 Frère

Dependency on Vulnerable Third-Party Component

This vulnerability occurs when your software relies on an external library, framework, or module that contains known security flaws.

CWE-250 Frère

Execution with Unnecessary Privileges

This vulnerability occurs when software runs with higher permissions than it actually needs to perform its tasks. This excessive privilege…

CWE-636 Frère

Not Failing Securely ('Failing Open')

This vulnerability occurs when a system, upon encountering an error or failure, defaults to its least secure configuration instead of a…

CWE-637 Frère

Unnecessary Complexity in Protection Mechanism (Not Using 'Economy of Mechanism')

This weakness occurs when a security feature is implemented with excessive complexity, creating unnecessary risk. Overly intricate…

CWE-638 Frère

Not Using Complete Mediation

This vulnerability occurs when software fails to verify access permissions every single time a user or process tries to use a resource.…

CWE-654 Frère

Reliance on a Single Factor in a Security Decision

This vulnerability occurs when a system's security check depends almost entirely on just one condition, object, or piece of data to decide…

CWE-655 Frère

Insufficient Psychological Acceptability

This weakness occurs when security features are so cumbersome or confusing that well-intentioned users feel forced to turn them off or…

Ressources

Further reading

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