POODLE (SSLv3)

Padding Oracle On Downgraded Legacy Encryption

Erro relacionado

“Este servidor tem protocolo SSLv3 habilitado e está vulnerável ao ataque Poodle (SSLv3). Desabilite o SSLv3 no servidor."

Problema

Em 2014, pesquisadores da Google descobriram uma vulnerabilidade no protocolo SSL 3.0 chamada vulnerabilidade "POODLE" (Padding Oracle On Downgrading Legacy Encryption).

Enquanto o protocolo SSL 3.0 estiver habilitado, um MITM (man-in-middle-attack) pode interceptar conexões criptografadas e calcular o texto simples das conexões interceptadas.

Vulnerabilidades/falhas de segurança do SSL 3.0:

  • Integridade da mensagem não é protegida
  • Vulnerável ao ataque Man-In-The-Middle

A forma mais eficiente de combater o ataque POODLE é desabilitar o protocolo SSL 3.0.

Solução

Lado do servidor

Desabilite o protocolo SSL 3.0 no servidor e habilite TLS 1.2 ou 1.3.

Lado do cliente

Além disso, a DigiCert recomenda desabilitar o protocolo SSL 3.0 e habilitar os protocolos TLS (1.2 ou 1.3) no lado do cliente.

Sobre

DigiCert is the world's leading provider of scalable TLS/SSL, IoT and PKI solutions for identity and encryption. The most innovative companies, including 89% of the Fortune 500 and 97 of the 100 top global banks, choose DigiCert for its expertise in identity and encryption for web servers and Internet of Things devices. DigiCert supports TLS and other digital certificates for PKI deployments at any scale through its certificate lifecycle management solution, CertCentral®. The company is recognized for its enterprise-grade certificate management platform, fast and knowledgeable customer support, and market-leading security solutions. For the latest DigiCert news and updates, visit digicert.com or follow @digicert.

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