Logstash vulnerability CVE-2015-4152

[Kevin Kluge <kevin () elastic co>]

Summary:
Logstash versions 1.4.2 and prior are vulnerable to a directory traversal attack that allows an attacker to over-write 
files on the server running Logstash.  This vulnerability is not present in the initial installation of Logstash.  The 
vulnerability is exposed when the file output plugin is configured for use.  The files impacted must be writeable by 
the user that owns the Logstash process.

We have been assigned CVE-2015-4152 for this issue.


Fixed versions:
Versions 1.5.0 and 1.4.3 have addressed the vulnerability.


Remediation:
Users that currently use the file output plugin or may use it in the future should upgrade to 1.5.0 or 1.4.3.  This 
will address the vulnerability and preserve file output functionality.

Users that do not want to upgrade can address the vulnerability by disabling the file output plugin.


Credit:
Colin Coghill reported this issue.


CVSS
Overall CVSS score: 4.3