CVE-2024-23639: micronaut-core management endpoints vulnerable to drive-by localhost attack
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.
Other sources
Micronaut Framework is a modern, JVM-based, full stack Java framework designed for building modular, easily testable JVM applications with support for Java, Kotlin and the Groovy language. 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. 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. 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. This issue has been addressed in version 3.8.3. Users are advised to upgrade.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
maven/io.micronaut:micronaut-http-server-tckto a version that resolves this vulnerability.Fixed in 3.8.3 - Upgrade
Upgrade
maven/io.micronaut:micronaut-http-server-nettyto a version that resolves this vulnerability.Fixed in 3.8.3 - Upgrade
Upgrade
maven/io.micronaut:micronaut-http-serverto a version that resolves this vulnerability.Fixed in 3.8.3 - Upgrade
Upgrade
micronaut-core management endpointsto a version that resolves this vulnerability.Fixed in 3.8.3
Event History
Frequently Asked Questions
What is the severity of CVE-2024-23639?
CVE-2024-23639 has a moderate severity due to unsecured management endpoints that are vulnerable to localhost attacks.
How do I fix CVE-2024-23639?
To fix CVE-2024-23639, upgrade to Micronaut versions 3.8.3 or later.
Which software is affected by CVE-2024-23639?
CVE-2024-23639 affects Micronaut versions prior to 3.8.3, specifically within the io.micronaut packages.
What are the risks associated with CVE-2024-23639?
The risks of CVE-2024-23639 include potential exploitation of unsecured management endpoints in development environments.
Is CVE-2024-23639 a common vulnerability?
CVE-2024-23639 is not common in production but could appear in development settings where management endpoints are unnecessarily enabled.