Somebody discovered a option to bypass the two-factor authentication (2FA) safety measure at Comcast Xfinity and compromise numerous accounts, studies have claimed. 

Following the bypass, the attackers are ready to make use of the compromised accounts to try to take over cryptocurrency trade accounts and cloud storage companies.

On December 19 Xfinity electronic mail customers began getting notified of modifications to their account info, however their passwords have been already modified so that they couldn’t enter. Those who managed to get again into the account discovered {that a} secondary electronic mail handle was added to the account, from a disposable area yopmail.com.

Bypassing 2FA

The secondary electronic mail handle is a safety measure utilized by some electronic mail suppliers that assist with password resets, account notifications, and related. 

Most of the victims took to Twitter, Reddit, and Xfinity boards to debate what had occurred, and stated that that they had 2FA enabled. So, whoever was behind the assault, managed to guess the password with credential stuffing, after which managed to bypass the two-factor authentication safety measure. BleepingComputer’s report states the attackers used a “privately circulated OTP (one-time password) bypass” which allowed them to generate working 2FA verification codes.

That gave them entry to the account, and including the secondary, disposable electronic mail account, allowed them to carry out the password reset course of.

After gaining full management over the compromised electronic mail accounts, the risk actors then proceeded to breach additional on-line companies, assuming individuals’s identities (opens in new tab) to request electronic mail resets. Dropbox, Evernote, Coinbase, and Gemini, are simply a number of the companies that the risk actors tried to breach.

Xfinity is preserving silent on the matter in the meanwhile, however a buyer stated on Reddit that the agency is conscious of the incident and is presently investigating. The identical supply additionally stated that in keeping with a buyer assist worker they spoke to, the problem appears to be fairly widespread.

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By way of: BleepingComputer (opens in new tab)