passenger: privilege lowering in switchGroup() in agent/ExecHelper/ExecHelperMain.cpp
Published Jun 21, 2018
5.3
MEDIUMCVSS 3.0
EPSS 1.20%
Description
An issue was discovered in switchGroup() in agent/ExecHelper/ExecHelperMain.cpp in Phusion Passenger before 5.3.2. The set of groups (gidset) is not set correctly, leaving it up to randomness (i.e., uninitialized memory) which supplementary groups are actually being set while lowering privileges.
Affected products
No data.
No data.
Red Hat Ceph Storage 1.3
ruby193-rubygem-passenger
Will not fix
Red Hat Ceph Storage 1.3
rubygem-passenger
Will not fix
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 | ruby193-rubygem-passenger | Will not fix | n/a |
| Red Hat Ceph Storage 1.3 | rubygem-passenger | Will not fix | 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
Red Hat statement
This issue did not affect the versions of rubygem-passenger as shipped with Red Hat Update Infrastructure as they did not include the vulnerable code, which was introduced in a newer version of the package.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
AV:N/AC:L/Au:N/C:N/I:P/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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.20% (0.01198) | 67.01th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.20% (0.01198) | 66.74th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.07% (0.00072) | 31.74th | v3 (v2023.03.01) |
| May 4, 2024 | 0.07% (0.00072) | 30.57th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.07% (0.00070) | 28.55th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.06% (0.00063) | 24.69th | 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 (7)
- https://access.redhat.com/security/cve/CVE-2018-12615 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1594361 Issue Tracking
- https://github.com/advisories/GHSA-4284-jfhc-f854 Advisory
- https://github.com/phusion/passenger/commit/4e97fdb86d0a0141ec9a052c6e691fcd07bb45c8 x_refsource_MISCPatchThird Party Advisory
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/passenger/CVE-2018-12615.yml
- https://nvd.nist.gov/vuln/detail/CVE-2018-12615
- https://www.cve.org/CVERecord?id=CVE-2018-12615
Change history (0)
No recorded changes yet.