Falhas do tipo CWE-754

461 resultados

Falta de validação de condições excepcionais

A fraqueza ocorre quando o software não valida ou valida incorretamente situações anômalas que raramente acontecem durante a operação normal. O desenvolvedor assume que certas condições 'nunca vão acontecer', deixando o código vulnerável quando elas de fato ocorrem — seja por entrada malformada, estado corrompido ou cenários edge case não previstos.

Exemplo

Um parser JSON que só testa o caminho feliz: carrega e processa um JSON válido, mas quando recebe um arquivo com caracteres especiais, tamanho excepcional ou estrutura quebrada, falha silenciosamente ou causa comportamento indefinido em vez de rejeitar explicitamente o entrada inválida.

Como mitigar

Sempre validar entradas e estados, não presumir cenários 'impossíveis': use try-catch, verificações de limites, e testes que explorem casos anormais (fuzzing, boundary testing). Falhe de forma segura e explícita — nunca em silêncio.

CVE-2021-39162HIGHIncorrect handling of H2 GOAWAY + SETTINGS framesEPSS 1.6%CVE-2019-6856HIGHA CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon Quantum, ModiconEPSS 1.6%CVE-2019-6857HIGHA CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon Quantum, ModiconEPSS 1.6%CVE-2021-43801HIGHUncaught Exception in mercuriusEPSS 1.5%CVE-2021-1446HIGHCisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service VulnerabilityEPSS 1.5%CVE-2022-31103HIGHImproper handling of CSS at-rules in lettersanitizerEPSS 1.5%CVE-2020-24677HIGHInsecure Web Service in Symphony PlusEPSS 1.4%CVE-2026-39929HIGHLakeside SysTrack Agent LsiAgent.exe Out-of-Bounds Read via UDPEPSS 1.4%CVE-2020-3480HIGHCisco IOS XE Software Zone-Based Firewall Denial of Service VulnerabilitiesEPSS 1.4%CVE-2019-6831A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in BMXNOR0200H Ethernet / Serial RTU module (all firmwaEPSS 1.4%CVE-2020-7537A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers ModicEPSS 1.4%CVE-2018-7794HIGHA CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon Quantum, ModiconEPSS 1.4%CVE-2020-7543A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers ModicEPSS 1.3%CVE-2020-7542A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers ModicEPSS 1.3%CVE-2020-1999MEDIUMPAN-OS: Threat signatures are evaded by specifically crafted packetsEPSS 1.3%CVE-2020-7477HIGHA CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Quantum Ethernet Network module 140NOE771x1 (VersionEPSS 1.3%CVE-2019-15989HIGHCisco IOS XR Software Border Gateway Protocol Attribute Denial of Service VulnerabilityEPSS 1.3%CVE-2019-6811An Improper Check for Unusual or Exceptional Conditions (CWE-754) vulnerability exists in Modicon Quantum 140 NOE771x1 version 6.9 and earliEPSS 1.3%CVE-2019-0068MEDIUMJunos OS: SRX Series: Denial of Service vulnerability in flowd due to multicast packetsEPSS 1.3%CVE-2023-23931MEDIUMCipher.update_into can corrupt memory in pyca cryptographyEPSS 1.3%