private_address_check contains race condition
High severity
GitHub Reviewed
Published
Jul 31, 2018
to the GitHub Advisory Database
•
Updated Aug 25, 2023
Description
Published to the GitHub Advisory Database
Jul 31, 2018
Reviewed
Jun 16, 2020
Last updated
Aug 25, 2023
The private_address_check ruby gem before 0.5.0 is vulnerable to a time-of-check time-of-use (TOCTOU) race condition due to the address the socket uses not being checked. DNS entries with a TTL of 0 can trigger this case where the initial resolution is a public address but the subsequent resolution is a private address.
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