Falha no WhatsApp permite que outros leiam mensagens de grupos

WhatsApp

WhatsApp

A descoberta foi feita por um grupo de pesquisadores da Ruhr University Bochum, na Alemanha. Com isso, quando o usuário "infiltrado" entrar, o aviso de que ele foi adicionado ao grupo ficará no alto do histórico de mensagens do grupo, não na altura do momento de entrada.

De acordo com o estudo, a falha ocorre porque o administrador não precisa fazer a autenticação dos novos membros, pois os usuários mal-intencionados poderiam ingressar no grupo a partir dos servidores do próprio WhatsApp.

Como explica o 'TechTudo', desde que o mensageiros implantou a criptografia, em 2016, a empresa garantiu que nem ela mesma conseguiria ter acesso às mensagens. No documento, os autores da pesquisa descrevem que "qualquer pessoa que controle os servidores do WhatsApp, incluindo funcionários da empresa, pode adicionar membros a qualquer grupo", sem que o dono do grupo em questão perceba.

Claro que ninguém espera que administradores dos servidores do WhatsApp façam algo do tipo, mas a falha é grave de qualquer forma, pois caso hackers consigam quebrar as barreiras de segurança desses servidores, eles terão acesso ao conteúdo de grupos do mensageiro.

Assim, o usuário infiltrado teria acesso e passaria a usufruir de todos os privilégios dos participantes, pois todos os membros contam com chave criptografada e com isso, o infiltrado conseguiria ler todas as conversas ao ser adicionado.

O WhatsApp é o mensageiro mais usado no mundo todo, os usuários podem se comunicar instantaneamente através de mensagens de texto, ligações e até mesmo chamadas de vídeo. Eles conseguiram descobrir uma brecha que permite adicionar novos participantes a uma conversa já existente e, ao mesmo tempo, camuflar os rastros de que isso aconteceu. No Brasil, o aplicativo já foi bloqueado diversas vezes por não colaborar com a Justiça, ou seja, por dizer não conseguir acessar as conversas dos usuários do aplicativo.

A companhia ressaltou que a falha que permite a adição de pessoas em grupos não será corrigida, isso porque é muito difícil que essa vulnerabilidade seja explorada.

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