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Logstash 1.4.2 Directory Traversal

Logstash 1.4.2 Directory Traversal
Posted Jun 10, 2015
Authored by Kevin Kluge

Logstash versions 1.4.2 and prior are vulnerable to a directory traversal attack that allows an attacker to overwrite files on the server running Logstash.

tags | advisory, file inclusion
advisories | CVE-2015-4152
SHA-256 | 15f05c723e1b04d767214a61d1c74ca2c6761f51c75c29b5564d9ff5525fe92f

Logstash 1.4.2 Directory Traversal

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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
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