CVE-2018-12027: Infoleak
First published: Sun Jun 17 2018(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Phusion Passenger | >=5.3.0<5.3.2 |
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Frequently Asked Questions
What is CVE-2018-12027?
CVE-2018-12027 is an Insecure Permissions vulnerability in SpawningKit in Phusion Passenger 5.3.x before 5.3.2.
What is the severity of CVE-2018-12027?
The severity of CVE-2018-12027 is high with a CVSS score of 8.8.
How does CVE-2018-12027 cause information disclosure?
CVE-2018-12027 causes information disclosure when a Passenger-spawned application process reports that it listens on a certain Unix domain socket, and any parent directories of the socket have insecure permissions.
Which versions of Phusion Passenger are affected by CVE-2018-12027?
Phusion Passenger versions 5.3.0 to 5.3.2 are affected by CVE-2018-12027.
How can I fix CVE-2018-12027?
To fix CVE-2018-12027, you should update Phusion Passenger to version 5.3.2 or later.
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