CVE-2023-24815 – io.vertx:vertx-web

Package

Manager: maven
Name: io.vertx:vertx-web
Vulnerable Version: >=4.0.0 <4.3.8

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00211 pctl0.43676

Details

StaticHandler disclosure of classpath resources on Windows when mounted on a wildcard route ### 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

Metadata

Created: 2023-02-10T03:27:58Z
Modified: 2023-02-10T03:27:58Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/02/GHSA-53jx-vvf9-4x38/GHSA-53jx-vvf9-4x38.json
CWE IDs: ["CWE-22"]
Alternative ID: GHSA-53jx-vvf9-4x38
Finding: F063
Auto approve: 1