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Micronaut management endpoints vulnerable to drive-by localhost attack

Moderate severity GitHub Reviewed Published Feb 8, 2024 in micronaut-projects/micronaut-core • Updated Feb 9, 2024

Package

maven io.micronaut:micronaut-http-server (Maven)

Affected versions

< 3.8.3

Patched versions

3.8.3
maven io.micronaut:micronaut-http-server-netty (Maven)
< 3.8.3
3.8.3
maven io.micronaut:micronaut-http-server-tck (Maven)
< 3.8.3
3.8.3

Description

Summary

Enabled but unsecured management endpoints are susceptible to drive-by localhost attacks. While not typical of a production application, these attacks may have more impact on a development environment where such endpoints may be flipped on without much thought.

Details

A malicious/compromised website can make HTTP requests to localhost. Normally, such requests would trigger a CORS preflight check which would prevent the request; however, some requests are "simple" and do not require a preflight check. These endpoints, if enabled and not secured, are vulnerable to being triggered.

Impact

Production environments typically disable unused endpoints and secure/restrict access to needed endpoints. A more likely victim is the developer in their local development host, who has enabled endpoints without security for the sake of easing development.

References

@mattmoss mattmoss published to micronaut-projects/micronaut-core Feb 8, 2024
Published by the National Vulnerability Database Feb 9, 2024
Published to the GitHub Advisory Database Feb 9, 2024
Reviewed Feb 9, 2024
Last updated Feb 9, 2024

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

EPSS score

0.043%
(11th percentile)

Weaknesses

CVE ID

CVE-2024-23639

GHSA ID

GHSA-583g-g682-crxf

Source code

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