CWE-280 Base Draft

Improper Handling of Insufficient Permissions or Privileges

This vulnerability occurs when a system fails to properly manage situations where it lacks the necessary permissions to perform an action or access a resource. This flawed handling can force the…

Definition

What is CWE-280?

This vulnerability occurs when a system fails to properly manage situations where it lacks the necessary permissions to perform an action or access a resource. This flawed handling can force the application into unintended states or error paths, potentially leading to crashes, data corruption, or security bypasses.
At its core, this weakness is about poor error handling for authorization checks. Instead of gracefully denying access and logging the event, the application might try to proceed with insufficient rights, triggering unexpected behavior in the code. This often stems from assuming permissions will always be sufficient or from catching a broad exception without specifically managing access-denied errors. For developers, the risk is that these unhandled permission failures create unstable conditions. The application could expose internal errors to users, corrupt its own state, or inadvertently allow actions it shouldn't. To prevent this, explicitly validate permissions before acting and implement robust, specific error handlers for authorization failures that safely guide the application back to a secure, valid state.
Auswirkungen in der Praxis

Real-world CVEs caused by CWE-280

  • CVE-2003-0501

    Special file system allows attackers to prevent ownership/permission change of certain entries by opening the entries before calling a setuid program.

  • CVE-2004-0148

    FTP server places a user in the root directory when the user's permissions prevent access to the their own home directory.

Wie Angreifer es ausnutzen

Angreiferpfad Schritt für Schritt

  1. 1

    Identifiziere einen Codepfad, der nicht vertrauenswürdige Eingaben ohne Validierung verarbeitet.

  2. 2

    Erzeuge eine Payload, die das unsichere Verhalten auslöst — Injection, Traversal, Overflow oder Logik-Missbrauch.

  3. 3

    Liefere die Payload über einen normalen Request aus und beobachte die Reaktion der Anwendung.

  4. 4

    Iteriere, bis die Antwort Daten preisgibt, Angreifer-Code ausführt oder Berechtigungen eskaliert.

Verwundbares Codebeispiel

Vulnerable pseudo

MITRE hat kein Codebeispiel für diese CWE veröffentlicht. Das untenstehende Muster ist illustrativ — kanonische Referenzen findest du unter Ressourcen.

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

Secure pseudo

Sicher 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.
Präventions-Checkliste

How to prevent CWE-280

  • Architecture and Design Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
  • Implementation Always check to see if you have successfully accessed a resource or system functionality, and use proper error handling if it is unsuccessful. Do this even when you are operating in a highly privileged mode, because errors or environmental conditions might still cause a failure. For example, environments with highly granular permissions/privilege models, such as Windows or Linux capabilities, can cause unexpected failures.
Erkennungssignale

How to detect CWE-280

SAST High

Führe statische Analyse (SAST) auf der Codebasis aus und suche im Datenfluss nach dem unsicheren Muster.

DAST Moderate

Führe dynamische Application-Security-Tests gegen den Live-Endpoint aus.

Runtime Moderate

Beobachte Runtime-Logs auf ungewöhnliche Exception-Traces, fehlerhafte Eingaben oder Versuche, Autorisierung zu umgehen.

Code review Moderate

Code Review: Markiere jeden neuen Code, der Eingaben von dieser Oberfläche ohne validierte Framework-Helper verarbeitet.

Plexicus Auto-Fix

Plexicus erkennt CWE-280 automatisch und öffnet in unter 60 Sekunden einen Fix-PR.

Codex Remedium scannt jeden Commit, identifiziert genau diese Schwachstelle und liefert einen reviewer-ready Pull Request mit dem Patch. Keine Tickets. Keine Hand-offs.

Demo anfordern Plexicus kostenlos testen
Häufig gestellte Fragen

Frequently asked questions

Was ist CWE-280?

This vulnerability occurs when a system fails to properly manage situations where it lacks the necessary permissions to perform an action or access a resource. This flawed handling can force the application into unintended states or error paths, potentially leading to crashes, data corruption, or security bypasses.

Wie gravierend ist CWE-280?

MITRE hat für diese Schwachstelle keine Exploit-Wahrscheinlichkeit veröffentlicht. Behandle sie als mittlere Auswirkung, bis dein Threat Model anderes belegt.

Welche Sprachen oder Plattformen sind von CWE-280 betroffen?

MITRE hat für diese CWE keine betroffenen Plattformen spezifiziert — sie kann in den meisten Anwendungs-Stacks auftreten.

Wie kann ich CWE-280 verhindern?

Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to…

Wie erkennt und behebt Plexicus CWE-280?

Die SAST-Engine von Plexicus erkennt die Datenfluss-Signatur von CWE-280 bei jedem Commit. Bei einem Treffer öffnet unser Codex-Remedium-Agent einen Fix-PR mit korrigiertem Code, Tests und einer einzeiligen Zusammenfassung für den Reviewer.

Wo erfahre ich mehr über CWE-280?

MITRE veröffentlicht die kanonische Definition unter https://cwe.mitre.org/data/definitions/280.html. Für ergänzende Hinweise kannst du auch die OWASP- und NIST-Dokumentation heranziehen.

Verwandte Schwachstellen

Weaknesses related to CWE-280

CWE-755 Parent

Improper Handling of Exceptional Conditions

This vulnerability occurs when software fails to properly manage unexpected situations or errors, leaving it in an unstable or insecure…

CWE-209 Sibling

Generation of Error Message Containing Sensitive Information

This vulnerability occurs when an application reveals sensitive details about its internal systems, user data, or environment within error…

CWE-248 Sibling

Uncaught Exception

This vulnerability occurs when a function throws an error or exception, but the calling code does not have a proper handler to catch and…

CWE-274 Sibling

Improper Handling of Insufficient Privileges

This vulnerability occurs when an application fails to properly manage situations where it lacks the necessary permissions to execute an…

CWE-333 Sibling

Improper Handling of Insufficient Entropy in TRNG

This vulnerability occurs when a system fails to properly manage the limited or unpredictable output rate of a true random number…

CWE-390 Sibling

Detection of Error Condition Without Action

This weakness occurs when software successfully identifies an error condition but then fails to take any meaningful action to address it.…

CWE-392 Sibling

Missing Report of Error Condition

This vulnerability occurs when a system fails to properly signal that an error has happened. Instead of returning a clear error code,…

CWE-395 Sibling

Use of NullPointerException Catch to Detect NULL Pointer Dereference

Using a try-catch block for NullPointerException as a substitute for proper null checks is an anti-pattern. This approach masks the root…

CWE-396 Sibling

Declaration of Catch for Generic Exception

This weakness occurs when code catches a generic exception type like 'Exception' or 'Throwable', which can hide specific errors and create…

Ressourcen

Further reading

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