Low severity3.7NVD Advisory· Published Jun 13, 2018· Updated Jun 17, 2026
CVE-2018-3759
CVE-2018-3759
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
private_address_checkRubyGems | < 0.5.0 | 0.5.0 |
Affected products
2- HackerOne/private_address_check ruby gemv5Range: 0.5.0
Patches
Vulnerability mechanics
References
4- github.com/jtdowney/private_address_check/commit/4068228187db87fea7577f7020099399772bb147nvdPatchThird Party AdvisoryWEB
- github.com/advisories/GHSA-2xvj-j3qh-x8c3ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2018-3759ghsaADVISORY
- github.com/rubysec/ruby-advisory-db/blob/master/gems/private_address_check/CVE-2018-3759.ymlghsaWEB
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