The vulnerability can also pave the way for potential malware infections. "Using this attack vector, an insider could exploit this vulnerability for corporate espionage, manipulation, or to gain access to documents outside of their purview," Well's security firm Tenable said in a separate report.Ĭredit: david wells / medium / screenshot Imagine a hacker using the links to secretly reconfigure a Slack desktop app to send all downloaded files to an outside server. Wells realized the same function could be abused. "Crafting a link like 'slack://settings/?update=' would change the default download location if clicked," Wells wrote in a blog post on the vulnerability. However, David Wells, a researcher at the security firm Tenable, noticed there's another way to configure the option: Via a special link. You can set a download location in the app's preferences section. The flaw involves Slack's Windows desktop app, and how it can automatically send downloaded files to a certain destination-whether it be on your PC or to an online storage server. A security researcher has uncovered a flaw in Slack that could've been exploited to steal files over the business messaging app and potentially spread malware.
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