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
Published Jun 13, 2018
3.7
LOWCVSS 3.0
EPSS 0.69%
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.
Affected products
-
- Version 0.5.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| HackerOne | Private Address Check Ruby Gem | n/a |
|
- < 0.5.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
AV:N/AC:M/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.69% (0.00691) | 51.05th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.69% (0.00691) | 51.36th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.08% (0.00085) | 36.63th | v3 (v2023.03.01) |
| May 22, 2024 | 0.08% (0.00085) | 36.01th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00084) | 33.94th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.42% (0.00416) | 10.04th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
References (4)
- https://github.com/advisories/GHSA-2xvj-j3qh-x8c3 Advisory
- https://github.com/jtdowney/private_address_check/commit/4068228187db87fea7577f7020099399772bb147 x_refsource_MISCPatchThird Party Advisory
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/private_address_check/CVE-2018-3759.yml
- https://nvd.nist.gov/vuln/detail/CVE-2018-3759
Change history (0)
No recorded changes yet.