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Telecommunications security: flaw exposes conversations and 2FA to the risk of interception

Risk of privacy violation through call diversion: measures and industry responses

A flaw in mobile security allows hackers to intercept calls and voice messages, exposing 2FA codes. Experts recommend greater precautions and Verizon promises corrective measures.

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A critical flaw in the call forwarding system gives cyber attackers the opportunity to intercept telephone conversations and voice messages containing two-factor authentication (2FA) codes. This risk arises from the ability to manipulate users into calling numbers controlled by the attackers, using a fraudulent connection that leverages the "tel://" protocol. With this method, the victim, by clicking on the link, unknowingly triggers a call to a number chosen by the attacker, who can thus divert the communication.

Attack methods and implications for authentication security

The attack mechanism highlighted by Jamison Vincenti O'Reilly, security expert, in an interview with 404 Media, presupposes an initial interaction via deceptive messages. Attackers can impersonate customer service representatives, telecommunications organizations, or even acquaintances, tricking victims into calling numbers specifically designed to intercept information. This vulnerability not only puts telephone communications at risk but extends the danger to 2FA codes, used to access critical services such as Gmail.

Expert answers and risk mitigation tips

Security specialists, including those cited in the article, have highlighted the urgent need to implement additional security measures to counter this threat. For example, it is recommended to introduce advanced authentication mechanisms, such as PIN codes, which remain known only to the legitimate user of the phone number. For its part, Google has released statements aimed at reassuring users, underlining the importance of using 2FA authentication methods correctly and protecting themselves from phishing attempts.

Interventions by telephone operators and preventive measures

Following the growing concern about this vulnerability, telecommunications companies such as Verizon have expressed their commitment to treating issues related to data security and user privacy seriously. The company confirmed its intention to take appropriate corrective measures to remedy the flaw. In a context in which cybersecurity plays an increasingly central role, it remains essential to maintain a vigilant attitude, avoiding interacting with suspicious links or contact requests.

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04/13/2024 16:42

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