CVE-2018-3759

LowCVSS 3.7/10Last modified Jun 17, 2026

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 but the subsequent resolution is a private address.

Metrics

CVSS 3.0 3.7/10CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-362

Affected software

Vendor	Product	Versions
HackerOne	private_address_check ruby gem	0.5.0

References

https://github.com/jtdowney/private_address_check/commit/4068228187db87fea7577f7020099399772bb147Patch, Third Party Advisory
https://github.com/jtdowney/private_address_check/commit/4068228187db87fea7577f7020099399772bb147Patch, Third Party Advisory

Timeline

Published: Jun 13, 2018
Last modified: Jun 17, 2026
NVD status: Modified

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