{"id":16747,"date":"2023-01-30T13:32:08","date_gmt":"2023-01-30T12:32:08","guid":{"rendered":"https:\/\/www.show.it\/meta-awards-27000-bounty-for-2fa-bypass-vulnerability\/"},"modified":"2023-01-30T13:32:08","modified_gmt":"2023-01-30T12:32:08","slug":"meta-awards-27000-bounty-for-2fa-bypass-vulnerability","status":"publish","type":"post","link":"https:\/\/www.show.it\/en\/meta-awards-27000-bounty-for-2fa-bypass-vulnerability\/","title":{"rendered":"Meta Awards $27,000 Bounty for 2FA Bypass Vulnerability"},"content":{"rendered":"

A researcher has disclosed the details of a two-factor authentication (2FA) vulnerability that earned him a $27,000 bug bounty from Facebook parent company Meta.\u00a0<\/strong><\/p>\n

Gtm Manoz of Nepal discovered in September 2022 that a system designed by Meta for confirming a phone number and email address did not have any rate-limiting protection.<\/p>\n

A fix was rolled out by Meta in October 2022 and the company highlighted Manoz\u2019s findings in its annual bug bounty program report<\/a>. The tech giant has paid out more than $16 million <\/a>through its program since 2011, with $2 million awarded in 2022.<\/p>\n

In a blog post published earlier this month, Manoz said he discovered the vulnerability<\/a> while analyzing a new Meta Accounts Center page in Instagram. Here, users can add an email address and phone number to their Instagram account and the Facebook account linked to their Instagram. In order to verify the email address and phone number, users have to enter a six-digit code received via email or SMS.\u00a0<\/p>\n

The researcher\u2019s analysis revealed that the system verifying the six-digit code did not have rate-limiting in place, which could have allowed an attacker to enter every possible code until they got the right one.<\/p>\n

Specifically, a hacker would have needed to know the phone number assigned by the targeted user to their Instagram and Facebook account. By exploiting the vulnerability, the attacker could have obtained the six-digit verification code through a brute-force attack and assigned the victim\u2019s phone number to an account they controlled.<\/p>\n

This resulted in the phone number being removed from the victim\u2019s Facebook and Instagram account and 2FA getting disabled due to security reasons \u2014 if a phone number is verified by another user, that user would be getting the SMS containing the 2FA code, and Meta is trying to prevent that.\u00a0<\/p>\n

Manoz showed that Facebook users did receive a notification when their phone number was removed due to being verified by a different person.\u00a0<\/p>\n

Based on the maximum potential impact of the vulnerability, Meta decided to pay out $27,200 for the researcher\u2019s findings.<\/p>\n

Related:<\/strong> Facebook Patches Vulnerability Exposing Page Admin Identity<\/a><\/p>\n

Related: <\/strong>Twitter Finds No Evidence of Vulnerability Exploitation in Recent Data Leaks<\/a><\/p>\n

Related: <\/strong>Facebook Pays Out $40,000 for Account Takeover Exploit Chain<\/a><\/p>\n

The post Meta Awards $27,000 Bounty for 2FA Bypass Vulnerability<\/a> appeared first on SecurityWeek<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

A researcher has disclosed the details of a two-factor authentication (2FA) vulnerability that earned him a $27,000 bug bounty from Facebook parent company Meta.\u00a0 Gtm Manoz of Nepal discovered in September 2022 that a system designed by Meta for confirming a phone number and email address did not have any rate-limiting protection. A fix was […]<\/p>\n","protected":false},"author":2,"featured_media":16748,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[125,23],"tags":[],"class_list":["post-16747","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-facebook","category-vulnerabilities"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.show.it\/en\/wp-json\/wp\/v2\/posts\/16747","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.show.it\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.show.it\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.show.it\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.show.it\/en\/wp-json\/wp\/v2\/comments?post=16747"}],"version-history":[{"count":0,"href":"https:\/\/www.show.it\/en\/wp-json\/wp\/v2\/posts\/16747\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.show.it\/en\/wp-json\/wp\/v2\/media\/16748"}],"wp:attachment":[{"href":"https:\/\/www.show.it\/en\/wp-json\/wp\/v2\/media?parent=16747"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.show.it\/en\/wp-json\/wp\/v2\/categories?post=16747"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.show.it\/en\/wp-json\/wp\/v2\/tags?post=16747"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}