Spring WebFlux Path Traversal via RouterFunctions FileSystemResource
CVE-2024-38816 Published on September 13, 2024
CVE-2024-38816: Path traversal vulnerability in functional web frameworks
Applications serving static resources through the functional web frameworks WebMvc.fn or WebFlux.fn are vulnerable to path traversal attacks. An attacker can craft malicious HTTP requests and obtain any file on the file system that is also accessible to the process in which the Spring application is running.
Specifically, an application is vulnerable when both of the following are true:
* the web application uses RouterFunctions to serve static resources
* resource handling is explicitly configured with a FileSystemResource location
However, malicious requests are blocked and rejected when any of the following is true:
* the Spring Security HTTP Firewall https://docs.spring.io/spring-security/reference/servlet/exploits/firewall.html is in use
* the application runs on Tomcat or Jetty
Vulnerability Analysis
CVE-2024-38816 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2024-38816 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2024-38816
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Affected Versions
Spring:- Version 5.3.x and below 5.3.40 is affected.
- Version 6.0.x and below 6.0.24 is affected.
- Version 6.1.x and below 6.1.13 is affected.
- Version 5.3.0 and below 5.3.40 is affected.
- Version 6.0.0 and below 6.0.24 is affected.
- Version 6.1.0 and below 6.1.13 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.