passenger: Insecure permissions in SpawningKit can allow for redirection of traffic under certain configurations
Published Jun 17, 2018
8.8
HIGHCVSS 3.1
EPSS 1.09%
Description
An Insecure Permissions vulnerability in SpawningKit in Phusion Passenger 5.3.x before 5.3.2 causes information disclosure in the following situation: given a Passenger-spawned application process that reports that it listens on a certain Unix domain socket, if any of the parent directories of said socket are writable by a normal user that is not the application's user, then that non-application user can swap that directory with something else, resulting in traffic being redirected to a non-application user's process through an alternative Unix domain socket.
Affected products
No data.
No data.
Red Hat Ceph Storage 1.3
rubygem-passenger
Not affected
Red Hat Satellite 6
rubygem-passenger
Not affected
Red Hat Update Infrastructure 3 for Cloud Providers
rubygem-passenger
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Ceph Storage 1.3 | rubygem-passenger | Not affected | n/a |
| Red Hat Satellite 6 | rubygem-passenger | Not affected | n/a |
| Red Hat Update Infrastructure 3 for Cloud Providers | rubygem-passenger | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
AV:N/AC:L/Au:S/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 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 3, 2026 | 1.09% (0.01088) | 64.15th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.09% (0.01088) | 63.84th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.08% (0.00078) | 34.40th | v3 (v2023.03.01) |
| Jun 22, 2024 | 0.08% (0.00078) | 34.16th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00078) | 32.15th | 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 | 0.62% (0.00624) | 17.80th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (8)
- https://access.redhat.com/security/cve/CVE-2018-12027 Vendor Advisory
- https://blog.phusion.nl/passenger-5-3-2 x_refsource_MISCMitigationVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1592619 Issue Tracking
- https://github.com/advisories/GHSA-whfx-877c-5p28 Advisory
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/passenger/CVE-2018-12027.yml
- https://nvd.nist.gov/vuln/detail/CVE-2018-12027
- https://security.gentoo.org/glsa/201807-02 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-12027
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2018-12027 | Vendor Advisory | |
| https://blog.phusion.nl/passenger-5-3-2 | x_refsource_MISCMitigationVendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1592619 | Issue Tracking | |
| https://github.com/advisories/GHSA-whfx-877c-5p28 | Advisory | |
| https://github.com/rubysec/ruby-advisory-db/blob/master/gems/passenger/CVE-2018-12027.yml | ||
| https://nvd.nist.gov/vuln/detail/CVE-2018-12027 | ||
| https://security.gentoo.org/glsa/201807-02 | vendor-advisoryx_refsource_GENTOOThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-12027 |
Change history (0)
No recorded changes yet.