ADVISORIES

• CVE-2018-3759 (NVD)
• GHSA-2xvj-j3qh-x8c3
• Vendor Advisory

GEM

private_address_check

PATCHED VERSIONS

• >= 0.5.0

DESCRIPTION

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 by the subsequent resolution is a private address.