CVE-2019-5421: Time-of-check Time-of-use (TOCTOU) Race Condition

April 3, 2019 (updated October 9, 2019)

Using the lockable module contains a vulnerability that can result in multiple concurrent requests can prevent an attacker from being blocked on brute force attacks.

References

github.com/plataformatec/devise/issues/4981
nvd.nist.gov/vuln/detail/CVE-2019-5421

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