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CVE-2018-3817· NVD / CVE Program· CNA elastic

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

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

MediumCVSS 6.5 · v3.0—No exploit Fix available
Published
Mar 30, 2018
Updated
Jun 16, 2026
EPSS
1.0% · 62th percentile
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Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.0%

Affected systems

VendorProduct
elasticlogstash

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • elastic logstashbefore 5.6.6
  • elastic logstash6.0.0 and later · before 6.1.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (elastic). Independent of NVD's CPE analysis and usually ahead of it.

  • Elastic Logstash

    • Before 6.1.2 or 5.6.6affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
SUSE:HPE Helion OpenStack 8grafanabefore 4.5.1-4.3.14.5.1-4.3.1
SUSE:HPE Helion OpenStack 8kafkabefore 0.9.0.1-5.3.10.9.0.1-5.3.1
SUSE:HPE Helion OpenStack 8logstashbefore 2.4.1-5.4.12.4.1-5.4.1
SUSE:HPE Helion OpenStack 8openstack-monasca-installerbefore 20180622_15.06-3.6.120180622_15.06-3.6.1
SUSE:OpenStack Cloud 7grafanabefore 4.5.1-1.8.14.5.1-1.8.1
SUSE:OpenStack Cloud 7kafkabefore 0.10.2.2-5.10.10.2.2-5.1
SUSE:OpenStack Cloud 7logstashbefore 2.4.1-5.12.4.1-5.1
SUSE:OpenStack Cloud 7monasca-installerbefore 20180608_12.47-9.120180608_12.47-9.1

Same product

elastic: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-7612A sensitive data disclosure flaw was found in the way Logstash versions before 5.6.15 and 6.6.1 logs malformed URLs.
    40Plan
  • CVE-2026-33466Improper Limitation of a Pathname to a Restricted Directory in Logstash Leading to Arbitrary File Write
    39Monitor
  • CVE-2019-7620Logstash versions before 7.4.1 and 6.8.4 contain a denial of service flaw in the Logstash Beats input plugin.
    31Monitor
  • CVE-2015-5378Logstash 1.5.x before 1.5.3 and 1.4.x before 1.4.4 allows remote attackers to read communications between Logstash Forwarder agent and Logst
    31Monitor
  • CVE-2016-1000221Logstash prior to version 2.3.4, Elasticsearch Output plugin would log to file HTTP authorization headers which could contain sensitive info
    31Monitor
  • CVE-2014-4326Elasticsearch Logstash 1.0.14 through 1.4.x before 1.4.2 allows remote attackers to execute arbitrary commands via a crafted event in (1) za
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
suse:grafana4.5.1-4.3.1 · SUSE:HPE Helion OpenStack 8Package registry (OSV)
suse:kafka0.9.0.1-5.3.1 · SUSE:HPE Helion OpenStack 8Package registry (OSV)
suse:logstash2.4.1-5.4.1 · SUSE:HPE Helion OpenStack 8Package registry (OSV)
suse:monasca-installer20180608_12.47-9.1 · SUSE:OpenStack Cloud 7Package registry (OSV)
suse:openstack-monasca-installer20180622_15.06-3.6.1 · SUSE:HPE Helion OpenStack 8Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-532 · Insertion of Sensitive Information into Log File

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records