An Okta login bug bypassed checking passwords on some long usernames

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On Friday evening, Okta posted an odd update to its list of security advisories. The latest entry reveals that under specific circumstances, someone could’ve logged in by entering anything for a password, but only if the account’s username had over 52 characters.

According to the note people reported receiving, other requirements to exploit the vulnerability included Okta checking the cache from a previous successful login, and that an organization’s authentication policy didn’t add extra conditions like requiring multi-factor authentication (MFA).

Here are the details that are currently available:

On October 30, 2024, a vulnerability was internally identified in generating the cache key for AD/LDAP DelAuth. The Bcrypt algorithm was…

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