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.
CVSS Vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:NPrivate Address Check Project Private Address Check
APPPrivate Address Check Project< 0.5.0
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CHECK WITH VENDOR
No clear patch data available. Check vendor references.
Tags
Race Condition
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