CVE-2019-7620 — Logstash versions before 7

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 respon

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
Elastic	Logstash	before 7.4.1 and 6.8.4

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

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

09References

• www.elastic.co — https://www.elastic.co/community/security
• discuss.elastic.co — https://discuss.elastic.co/t/elastic-stack-6-8-4-security-update/204908
• discuss.elastic.co — https://discuss.elastic.co/t/elastic-stack-7-4-1-security-update/204909