passenger: Header overwriting issue allowing user impersonation
Published Jan 8, 2016
3.7
LOWCVSS 3.0
EPSS 2.36%
Description
agent/Core/Controller/SendRequest.cpp in Phusion Passenger before 4.0.60 and 5.0.x before 5.0.22, when used in Apache integration mode or in standalone mode without a filtering proxy, allows remote attackers to spoof headers passed to applications by using an _ (underscore) character instead of a - (dash) character in an HTTP header, as demonstrated by an X_User header.
Affected products
No data.
- ≤ 4.0.59
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.0
- 5.0.1
- 5.0.2
- 5.0.3
- 5.0.4
- 5.0.5
- 5.0.6
- 5.0.7
- 5.0.8
- 5.0.9
- 5.0.10
- 5.0.11
- 5.0.12
- 5.0.13
- 5.0.14
- 5.0.15
- 5.0.16
- 5.0.17
- 5.0.18
- 5.0.19
- 5.0.20
- 5.0.21
No data.
OpenStack Foreman
ruby193-rubygem-passenger
Will not fix
OpenStack Foreman
rubygem-passenger
Will not fix
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 Enterprise Linux OpenStack Platform 6 (Juno) Installer
ruby193-rubygem-passenger
Will not fix
Red Hat Enterprise Linux OpenStack Platform 6 (Juno) Installer
rubygem-passenger
Will not fix
Red Hat OpenShift Enterprise 2
ruby193-rubygem-passenger
Will not fix
Red Hat OpenShift Enterprise 2
ruby200-rubygem-passenger
Will not fix
Red Hat OpenShift Enterprise 2
rubygem-passenger
Will not fix
Red Hat Satellite 6
rubygem-passenger
Not affected
Red Hat Satellite 6
tfm-rubygem-passenger
Not affected
Red Hat Software Collections
rh-passenger40-passenger
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| OpenStack Foreman | ruby193-rubygem-passenger | Will not fix | n/a |
| OpenStack Foreman | rubygem-passenger | Will not fix | n/a |
| 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 Enterprise Linux OpenStack Platform 6 (Juno) Installer | ruby193-rubygem-passenger | Will not fix | n/a |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) Installer | rubygem-passenger | Will not fix | n/a |
| Red Hat OpenShift Enterprise 2 | ruby193-rubygem-passenger | Will not fix | n/a |
| Red Hat OpenShift Enterprise 2 | ruby200-rubygem-passenger | Will not fix | n/a |
| Red Hat OpenShift Enterprise 2 | rubygem-passenger | Will not fix | n/a |
| Red Hat Satellite 6 | rubygem-passenger | Not affected | n/a |
| Red Hat Satellite 6 | tfm-rubygem-passenger | Not affected | n/a |
| Red Hat Software Collections | rh-passenger40-passenger | Will not fix | n/a |
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:N/I:L/A:N
AV:N/AC:M/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
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.36% (0.02364) | 83.17th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.36% (0.02364) | 81.53th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.43% (0.00432) | 60.57th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.73% (0.00727) | 81.34th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.73% (0.00727) | 80.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.73% (0.00727) | 77.68th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.41% (0.01408) | 72.89th | v2 (v2022.01.01) |
| Mar 2, 2023 | 1.41% (0.01408) | 72.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.41% (0.01408) | 70.87th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01408) | 49.94th | v2 (v2022.01.01) |
References (15)
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00024.html vendor-advisoryx_refsource_SUSE
- http://www.openwall.com/lists/oss-security/2015/12/07/1 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2015/12/07/2 mailing-listx_refsource_MLIST
- https://access.redhat.com/security/cve/CVE-2015-7519 Vendor Advisory
- https://blog.phusion.nl/2015/12/07/cve-2015-7519/ x_refsource_CONFIRMVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1290405 Issue Tracking
- https://bugzilla.suse.com/show_bug.cgi?id=956281 x_refsource_CONFIRM
- https://github.com/advisories/GHSA-fxwv-953p-7qpf Advisory
- https://github.com/phusion/passenger/commit/ddb8ecc4ebf260e4967f57f271d4f5761abeac3e x_refsource_CONFIRM
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/passenger/CVE-2015-7519.yml
- https://lists.debian.org/debian-lts-announce/2018/06/msg00007.html mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2015-7519
- https://puppet.com/security/cve/passenger-dec-2015-security-fixes x_refsource_CONFIRM
- https://web.archive.org/web/20220327073056/https://www.puppet.com/security/cve/passenger-dec-2015-security-fixes
- https://www.cve.org/CVERecord?id=CVE-2015-7519
Change history (0)
No recorded changes yet.