# Beats 5.6.4 security update

**URL:** https://discuss.elastic.co/t/beats-5-6-4-security-update/106739
**Category:** Security Announcements
**Created:** [November 7, 2017, 7:02pm UTC](https://discuss.elastic.co/t/beats-5-6-4-security-update/106739 "2017-11-07T19:02:16Z")
**Posts on this page:** 1
**Showing post:** 1

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### Author: ![joshbressers](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/joshbressers/32/42332_2.png) [@joshbressers](https://discuss.elastic.co/u/joshbressers)
#### Post date: [November 7, 2017, 7:02pm UTC](https://discuss.elastic.co/t/beats-5-6-4-security-update/106739/1 "2017-11-07T19:02:16Z")

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**Packetbeat denial of service (ESA-2017-21)**

Packetbeat versions prior to 5.6.4 are affected by a denial of service flaw in the PostgreSQL protocol handler. If Packetbeat is listening for PostgreSQL traffic and a user is able to send arbitrary network traffic to the monitored port, the attacker could prevent Packetbeat from properly logging other PostgreSQL traffic.

**Affected Versions:** All prior to 5.6.4

**Solutions and Mitigations:**  
Users should upgrade to Packetbeat version 5.6.4. This issue can be avoided by disabling the PostgreSQL protocol.

**Credit:** Thanks to Teppei Fukuda for reporting this issue.

**CVE ID:** CVE-2017-11480

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_[View the full topic](https://discuss.elastic.co/t/beats-5-6-4-security-update/106739)._