August 8, 2022

News and Update

A Slack bug uncovered some customers’ hashed passwords for five years

Communication workplace Slack platform is understood for being simple to make use of and intuitive. However the firm communicate on Friday that one in all its low-friction options contained a flaw, which has now been fastened, that uncovered the encrypted variations of some customers to obfuscation.

When a person creates or revokes a hyperlink — referred to as a “shared invite hyperlink” — that others can use to join a sure Slack workspace, the command additionally inadvertently transmits the hashed password. of the creator hyperlinks to different members of that workspace. The vulnerability affected the passwords of anybody who created or deleted a shared invite hyperlink over a 5-year interval, from April 17, 2017 to July 17, 2022.

Slack, that’s now personal by Salesforce, says a safety researcher disclosed the bug to the corporate on July 17, 2022. Improper passwords don’t present up anyplace in Slack, the corporate notes, and might solely be caught by somebody actively monitoring the related encrypted community site visitors from Slack’s server. Whereas the corporate stated it’s unlikely the precise contents of any passwords have been compromised as a result of vulnerability, it introduced the influence on customers on Thursday and compelled password resets for all. surname.

Slack stated the scenario affected about 0.5% of customers. In 2019 the corporate communicate it has greater than 10 million day by day lively customers, which suggests about 50,000 notifications. To this point, the corporate may have virtually doubled that variety of customers. Some customers whose passwords have been uncovered over the course of 5 years should not be Slack customers at the moment.

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“We instantly took steps to implement a repair and launch the replace the identical day the bug was found, on July 17, 2022,” the corporate stated in an announcement. “Slack has notified all affected prospects and the passwords for affected customers have been reset.”

The corporate didn’t reply to questions from WIRED at press time about what hashing algorithm it used on the passwords or whether or not the incident prompted broader opinions of its password administration structure. of Slack or not.

“Sadly in 2022, we’re nonetheless seeing apparent errors because of failed menace modeling,” stated Jake Williams, director of cyber menace intelligence at safety agency Scythe. . “Whereas apps like Slack definitely do safety checks, bugs like this that solely seem in edge case performance are nonetheless missed. And clearly, the stakes are excessive in relation to delicate knowledge like passwords.”

This case highlights the problem of designing versatile and usable net functions, whereas limiting entry to extremely precious knowledge comparable to passwords. In case you get a notification from Slack, change your password and be sure to have two-factor authentication turned on. It’s also possible to view the entry log in your account.