Logstash

Improper Limitation of a Pathname to a Restricted Directory (CWE-22) in Logstash can lead to arbitrary file write and potentially remote code execution via Relative Path Traversal (CAPEC-139). The archive extraction utilities used by Logstash do not properly validate file paths within compressed archives. An attacker who can serve a specially crafted archive to Logstash through a compromised or attacker-controlled update endpoint can write arbitrary files to the host filesystem with the privileges of the Logstash process. In certain configurations where automatic pipeline reloading is enabled, this can be escalated to remote code execution.

Published: 2026-04-08T16:50:42.186Z
Updated: 2026-04-10T03:56:01.015Z

Improper certificate validation in Logstash's TCP output could lead to a man-in-the-middle (MitM) attack in “client” mode, as hostname verification in TCP output was not being performed when the ssl_verification_mode => full was set.

Published: 2025-05-06T17:29:07.189Z
Updated: 2025-05-06T17:51:59.631Z

An issue was identified by Elastic whereby sensitive information is recorded in Logstash logs under specific circumstances. The prerequisites for the manifestation of this issue are: * Logstash is configured to log in JSON format https://www.elastic.co/guide/en/logstash/current/running-logstash-command-line.html , which is not the default logging format. * Sensitive data is stored in the Logstash keystore and referenced as a variable in Logstash configuration.

Published: 2023-11-15T08:05:26.561Z
Updated: 2025-02-13T17:14:31.789Z

In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.

Published: 2021-05-13T17:35:19.000Z
Updated: 2024-08-03T18:30:24.012Z

Logstash versions before 7.4.1 and 6.8.4 contain a denial of service flaw in the Logstash Beats input plugin. An unauthenticated user who is able to connect to the port the Logstash beats input could send a specially crafted network packet that would cause Logstash to stop responding.

Published: 2019-10-30T13:38:40.000Z
Updated: 2024-08-04T20:54:28.357Z

Winlogbeat versions before 5.6.16 and 6.6.2 had an insufficient logging flaw. An attacker able to inject certain characters into a log entry could prevent Winlogbeat from recording the event.

Published: 2019-03-25T18:34:06.000Z
Updated: 2024-08-04T20:54:28.314Z

A sensitive data disclosure flaw was found in the way Logstash versions before 5.6.15 and 6.6.1 logs malformed URLs. If a malformed URL is specified as part of the Logstash configuration, the credentials for the URL could be inadvertently logged as part of the error message.

Published: 2019-03-25T18:34:06.000Z
Updated: 2024-08-04T20:54:28.269Z

When logging warnings regarding deprecated settings, Logstash before 5.6.6 and 6.x before 6.1.2 could inadvertently log sensitive information.

Published: 2018-03-30T20:00:00.000Z
Updated: 2024-08-05T04:57:22.973Z

Logstash versions prior to 2.3.3, when using the Netflow Codec plugin, a remote attacker crafting malicious Netflow v5, Netflow v9 or IPFIX packets could perform a denial of service attack on the Logstash instance. The errors resulting from these crafted inputs are not handled by the codec and can cause the Logstash process to exit.

Published: 2017-06-16T21:00:00.000Z
Updated: 2024-08-06T03:21:51.334Z

Prior to Logstash version 5.0.1, Elasticsearch Output plugin when updating connections after sniffing, would log to file HTTP basic auth credentials.

Published: 2017-06-16T21:00:00.000Z
Updated: 2024-08-06T03:21:50.889Z

Logstash prior to version 2.1.2, the CSV output can be attacked via engineered input that will create malicious formulas in the CSV data.

Published: 2017-06-16T21:00:00.000Z
Updated: 2024-08-06T03:55:27.663Z

Logstash prior to version 2.3.4, Elasticsearch Output plugin would log to file HTTP authorization headers which could contain sensitive information.

Published: 2017-06-16T21:00:00.000Z
Updated: 2024-08-06T03:55:27.403Z

Directory traversal vulnerability in the file output plugin in Elasticsearch Logstash before 1.4.3 allows remote attackers to write to arbitrary files via vectors related to dynamic field references in the path option.

Published: 2015-06-15T15:00:00.000Z
Updated: 2024-08-06T06:04:02.978Z