CWE-1117 Base Incompleto

Callable with Insufficient Behavioral Summary

This weakness occurs when a function, method, or API lacks clear documentation about its behavior. The signature or comments fail to properly explain what inputs it expects, what outputs it returns,…

Definição

What is CWE-1117?

This weakness occurs when a function, method, or API lacks clear documentation about its behavior. The signature or comments fail to properly explain what inputs it expects, what outputs it returns, what side effects it causes, or what assumptions it makes.
When a callable's behavior isn't clearly summarized, developers using it must spend extra time reading source code, making educated guesses, or running tests to understand it. This slows down development, increases the chance of misuse, and makes code reviews less effective because the intended contract is ambiguous. Over time, this ambiguity directly undermines security. It becomes harder to spot vulnerabilities during maintenance or audits because the code's purpose is unclear. Furthermore, when making changes, developers might inadvertently violate hidden assumptions, introducing bugs or security flaws that could have been prevented with proper documentation.
Impacto no mundo real

Real-world CVEs caused by CWE-1117

Ainda não há referências CVE públicas associadas a este CWE no catálogo da MITRE.

Como os atacantes a exploram

Trajeto do atacante passo a passo

  1. 1

    Identificar um caminho de código que trata input não confiável sem validação.

  2. 2

    Criar um payload que explora o comportamento inseguro — injeção, traversal, overflow ou abuso de lógica.

  3. 3

    Entregar o payload através de um pedido normal e observar a reação da aplicação.

  4. 4

    Iterar até que a resposta exponha dados, execute código do atacante ou escale privilégios.

Exemplo de código vulnerável

Vulnerable pseudo

A MITRE não publicou um exemplo de código para este CWE. O padrão abaixo é ilustrativo — consulte os Recursos para referências canónicas.

Vulnerável pseudo
// Example pattern — see MITRE for the canonical references.
function handleRequest(input) {
  // Untrusted input flows directly into the sensitive sink.
  return executeUnsafe(input);
}
Exemplo de código seguro

Secure pseudo

Seguro 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.
Lista de verificação de prevenção

How to prevent CWE-1117

  • Architecture Use safe-by-default frameworks and APIs that prevent the unsafe pattern from being expressible.
  • Implementation Validate input at trust boundaries; use allowlists, not denylists.
  • Implementation Apply the principle of least privilege to credentials, file paths, and runtime permissions.
  • Testing Cover this weakness in CI: SAST rules + targeted unit tests for the data flow.
  • Operation Monitor logs for the runtime signals listed in the next section.
Sinais de deteção

How to detect CWE-1117

SAST High

Executar análise estática (SAST) na base de código à procura do padrão inseguro no fluxo de dados.

DAST Moderate

Executar testes dinâmicos de segurança de aplicações (DAST) contra o endpoint em execução.

Runtime Moderate

Monitorizar os registos em tempo de execução para traços de exceção invulgares, input malformado ou tentativas de contornar a autorização.

Code review Moderate

Revisão de código: sinalizar qualquer novo código que trate input desta superfície sem usar os ajudantes validados do framework.

CWE-1117

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.

Perguntas frequentes

Frequently asked questions

O que é o CWE-1117?

This weakness occurs when a function, method, or API lacks clear documentation about its behavior. The signature or comments fail to properly explain what inputs it expects, what outputs it returns, what side effects it causes, or what assumptions it makes.

Qual a gravidade do CWE-1117?

A MITRE não publicou uma classificação de probabilidade de exploração para esta fraqueza. Trate-a como impacto médio até o seu modelo de ameaças provar o contrário.

Que linguagens ou plataformas são afetadas pelo CWE-1117?

A MITRE não especificou as plataformas afetadas por este CWE — pode aplicar-se à maioria das stacks de aplicações.

Como posso prevenir o CWE-1117?

Use safe-by-default frameworks, validate untrusted input at trust boundaries, and apply the principle of least privilege. Cover the data-flow signature in CI with SAST.

Como é que o Plexicus deteta e corrige o CWE-1117?

O motor SAST do Plexicus correlaciona a assinatura de fluxo de dados do CWE-1117 em cada commit. Quando é encontrada uma correspondência, o nosso agente Codex Remedium abre um PR de correção com o código corrigido, testes e um resumo de uma linha para o revisor.

Onde posso saber mais sobre o CWE-1117?

A MITRE publica a definição canónica em https://cwe.mitre.org/data/definitions/1117.html. Pode também consultar a documentação da OWASP e do NIST para orientações adjacentes.

Fraquezas relacionadas

Weaknesses related to CWE-1117

CWE-1078 Pai

Inappropriate Source Code Style or Formatting

This weakness occurs when source code violates established style guidelines for formatting, indentation, whitespace, or commenting, making…

CWE-1085 Irmão

Invokable Control Element with Excessive Volume of Commented-out Code

This weakness occurs when a callable function, method, or procedure contains a large amount of inactive, commented-out code within its…

CWE-1099 Irmão

Inconsistent Naming Conventions for Identifiers

This weakness occurs when a codebase uses mixed naming styles for elements like variables, functions, data types, or files, creating an…

CWE-1106 Irmão

Insufficient Use of Symbolic Constants

This weakness occurs when developers embed raw numbers or text strings directly in code instead of using named symbolic constants, making…

CWE-1107 Irmão

Insufficient Isolation of Symbolic Constant Definitions

This weakness occurs when a codebase uses symbolic constants (like named values for numbers or strings) but scatters their definitions…

CWE-1109 Irmão

Use of Same Variable for Multiple Purposes

This weakness occurs when a single variable is reused to handle multiple, unrelated tasks or to store different pieces of data throughout…

CWE-1113 Irmão

Inappropriate Comment Style

This weakness occurs when source code comments are written in a style or format that doesn't match the project's established standards or…

CWE-1114 Irmão

Inappropriate Whitespace Style

This weakness occurs when source code uses inconsistent or non-standard whitespace formatting, such as irregular indentation, spacing, or…

CWE-1115 Irmão

Source Code Element without Standard Prologue

This weakness occurs when source code files or modules lack a consistent, standardized header or prologue that the development team has…

Pronto para validar o que importa?

Pronto para validar o que importa.

O Plexicus é Proof-Driven AppSec: achados validados, compreensão contextual e remediação revisada — ancorada em evidência, escopada com você.

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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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