Legacy Lenovo login opens 5,000 Dropbox accounts to attackers

Dropbox warned about 5,000 users that attackers abused a legacy Lenovo ID login integration to access accounts and files between August 4 and 21.

Attackers exploited an integration allowing Dropbox access via Lenovo IDs, registering Lenovo IDs with Dropbox users' email addresses due to a flaw in Lenovo's email verification process. The compromise lasted from August 4 to 21; attackers accessed files belonging to fewer than a third of the roughly 5,000 affected users, none of whom had 2FA enabled. Bitcoin security company Casa co-founder Jameson Lopp reported attackers attempted to access one locally encrypted file. Dropbox expired all Lenovo ID sessions, severed the integration link, and urged affected users to reset passwords and enable 2FA while Lenovo's investigation continues.