CVE-2023-24815
MEDIUM4.8EPSS 0.35%StaticHandler disclosure of classpath resources on Windows when mounted on a wildcard route
Description
### Summary When running vertx web applications that serve files using `StaticHandler` on Windows Operating Systems and Windows File Systems, if the mount point is a wildcard (`*`) then an attacker can exfiltrate any class path resource. ### Details When computing the relative path to locate the resource, in case of wildcards, the code: https://github.com/vert-x3/vertx-web/blob/62c0d66fa1c179ae6a4d57344631679a2b97e60f/vertx-web/src/main/java/io/vertx/ext/web/impl/Utils.java#L83 returns the user input (without validation) as the segment to lookup. Even though checks are performed to avoid escaping the sandbox, given that the input was not sanitized `\` are not properly handled and an attacker can build a path that is valid within the classpath. ### PoC https://github.com/adrien-aubert-drovio/vertx-statichandler-windows-traversal-path-vulnerability
Affected packages (1)
- Maven/io.vertx:vertx-web>= 4.0.0, < 4.3.8
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2023-24815
- PATCHhttps://github.com/vert-x3/vertx-web
- WEBhttps://github.com/vert-x3/vertx-web/blob/62c0d66fa1c179ae6a4d57344631679a2b97e60f/vertx-web/src/main/java/io/vertx/ext/web/impl/Utils.java#L83
- WEBhttps://github.com/vert-x3/vertx-web/commit/9e3a783b1d1a731055e9049078b1b1494ece9c15
- WEBhttps://github.com/vert-x3/vertx-web/security/advisories/GHSA-53jx-vvf9-4x38