The private_address_check ruby gem before 0.4.0 is vulnerable to a bypass due to use of Ruby's Resolv.getaddresses method, which is OS-dependent and should not be relied upon for security measures, such as when used to blacklist private network addresses to prevent server-side request forgery
Published Nov 13, 2017
8.1
HIGHCVSS 3.0
EPSS 2.42%
Description
The private_address_check ruby gem before 0.4.0 is vulnerable to a bypass due to use of Ruby's Resolv.getaddresses method, which is OS-dependent and should not be relied upon for security measures, such as when used to blacklist private network addresses to prevent server-side request forgery.
Affected products
-
- Version Versions before 0.4.0StatusaffectedConstraints-
- 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 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Jtdowney | Private Address Check Ruby Gem | n/a |
|
- < 0.4.0
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:H/I:H/A:H
AV:N/AC:M/Au:N/C:P/I:P/A:P
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 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.42% (0.02415) | 83.58th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.42% (0.02415) | 81.94th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.37% (0.00371) | 72.89th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.37% (0.00371) | 71.84th | v3 (v2023.03.01) |
| May 8, 2023 | 0.37% (0.00371) | 68.48th | v3 (v2023.03.01) |
| Apr 6, 2023 | 0.44% (0.00442) | 71.01th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.43% (0.00426) | 70.34th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.25% (0.01247) | 30.57th | v1 |
| Jan 6, 2022 | 1.25% (0.01247) | 29.93th | v1 |
| Sep 1, 2021 | 1.25% (0.01247) | 68.62th | v1 |
| Apr 14, 2021 | 1.25% (0.01247) | 0.00th | v1 |
References (7)
- https://edoverflow.com/2017/ruby-resolv-bug/ x_refsource_MISCIssue TrackingThird Party Advisory
- https://github.com/advisories/GHSA-hxhj-hp9m-qwc4 Advisory
- https://github.com/jtdowney/private_address_check/commit/58a0d7fe31de339c0117160567a5b33ad82b46af x_refsource_CONFIRMThird Party Advisory
- https://github.com/jtdowney/private_address_check/issues/1 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://hackerone.com/reports/287245 x_refsource_MISCIssue TrackingMitigationPatchThird Party Advisory
- https://hackerone.com/reports/287835 x_refsource_MISCPermissions RequiredThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-0904
| Link | Providers | Tags |
|---|---|---|
| https://edoverflow.com/2017/ruby-resolv-bug/ | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://github.com/advisories/GHSA-hxhj-hp9m-qwc4 | Advisory | |
| https://github.com/jtdowney/private_address_check/commit/58a0d7fe31de339c0117160567a5b33ad82b46af | x_refsource_CONFIRMThird Party Advisory | |
| https://github.com/jtdowney/private_address_check/issues/1 | x_refsource_CONFIRMIssue TrackingThird Party Advisory | |
| https://hackerone.com/reports/287245 | x_refsource_MISCIssue TrackingMitigationPatchThird Party Advisory | |
| https://hackerone.com/reports/287835 | x_refsource_MISCPermissions RequiredThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-0904 |
Change history (0)
No recorded changes yet.