| Package | Affected versions | Patched versions |
|---|---|---|
| private_address_check | < 0.5.0 | 0.5.0 |
| private address check | < 0.5.0 | 0.5.0 |
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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