# CVE-2017-16355: libapache2-mod-passenger: In agent/Core/SpawningKit/Spawner.h in Phusion Passenger 5.1.10 (fixed in Passenger Open Source 5.1.11 and Passenger...

CVE-2017-16355 is fixed in 3 products on 1 platform, first by libapache2-mod-passenger 5.0.30-1+deb9u1build0.18.04.1, released June 17, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-16355
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0036
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 14, 2017

## Description

In agent/Core/SpawningKit/Spawner.h in Phusion Passenger 5.1.10 (fixed in Passenger Open Source 5.1.11 and Passenger Enterprise 5.1.10), if Passenger is running as root, it is possible to list the contents of arbitrary files on a system by symlinking a file named REVISION from the application root folder to a file of choice and querying passenger-status --show=xml.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libapache2-mod-passenger Ubuntu 18.04.6 LTS (bionic) | 5.0.30-1+deb9u1build0.18.04.1 | [libapache2-mod-passenger 5.0.30-1+deb9u1build0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libapache2-mod-passenger-5.0.30-1-deb9u1build0.18.04.1.md) | Jun 17, 2018 |
| Linux | passenger Ubuntu 18.04.6 LTS (bionic) | 5.0.30-1+deb9u1build0.18.04.1 | [passenger 5.0.30-1+deb9u1build0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-passenger-5.0.30-1-deb9u1build0.18.04.1.md) | Jun 17, 2018 |
| Linux | ruby-passenger Ubuntu 18.04.6 LTS (bionic) | 5.0.30-1+deb9u1build0.18.04.1 | [ruby-passenger 5.0.30-1+deb9u1build0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ruby-passenger-5.0.30-1-deb9u1build0.18.04.1.md) | Jun 17, 2018 |

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Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo