Description
Phusion Passenger gem before 3.0.21 and 4.0.x before 4.0.5 for Ruby allows local users to cause a denial of service (prevent application start) or gain privileges by pre-creating a temporary "config" file in a directory with a predictable name in /tmp/ before it is used by the gem.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenShift 1 | mod_passenger +11 | 3.0.21-3.el6op | RHSA-2013:1136 |
| Red Hat OpenShift 1 | rubygem-file-tail +1 | 1.0.5-4.el6op | RHSA-2013:1136 |
| Red Hat OpenShift 1 | rubygem-spruz +1 | 0.2.5-4.el6op | RHSA-2013:1136 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE WebYast 1.3 | rubygem-passenger | 3.0.14-0.14.1 | SUSE-SU-2016:0042-1 |
| SUSE Studio Onsite 1.3 | rubygem-passenger | 3.0.14-0.14.1 | SUSE-SU-2016:0042-1 |
| SUSE Lifecycle Management Server 1.3 | rubygem-passenger | 3.0.14-0.14.1 | SUSE-SU-2016:0042-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| RubyGems | passenger | < 3.0.21 | 3.0.21 | GHSA-9qj7-jvg4-qr2x |
| RubyGems | passenger | >= 4.0.1, < 4.0.5 | 4.0.5 | GHSA-9qj7-jvg4-qr2x |
Advisories 2
- RHSA-2013:1136 Red Hat Security Advisory: rubygem-passenger security update Red Hat Security Advisories (RHSA) · Mar 23, 2026
- SUSE-SU-2016:0042-1 Security update for rubygem-passenger SUSE / openSUSE Security Updates · Feb 4, 2026