Vulnerability Details : CVE-2023-24815
Vert.x-Web is a set of building blocks for building web applications in the java programming language. 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. When computing the relative path to locate the resource, in case of wildcards, the code: `return "/" + rest;` from `Utils.java` 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. This issue only affects users deploying in windows environments and upgrading is the advised remediation path. There are no known workarounds for this vulnerability.
Vulnerability category: Directory traversal
Products affected by CVE-2023-24815
- cpe:2.3:a:eclipse:vert.x-web:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-24815
0.15%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 52 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-24815
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
3.9
|
1.4
|
NIST | |
4.8
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
2.2
|
2.5
|
GitHub, Inc. |
CWE ids for CVE-2023-24815
-
The product 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 product 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.Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-24815
-
https://github.com/vert-x3/vertx-web/security/advisories/GHSA-53jx-vvf9-4x38
StaticHandler disclosure of classpath resources on Windows when mounted on a wildcard route · Advisory · vert-x3/vertx-web · GitHubExploit;Vendor Advisory
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https://github.com/vert-x3/vertx-web/blob/62c0d66fa1c179ae6a4d57344631679a2b97e60f/vertx-web/src/main/java/io/vertx/ext/web/impl/Utils.java#L83
vertx-web/Utils.java at 62c0d66fa1c179ae6a4d57344631679a2b97e60f · vert-x3/vertx-web · GitHubIssue Tracking
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https://github.com/vert-x3/vertx-web/commit/9e3a783b1d1a731055e9049078b1b1494ece9c15
Fix the webroot escape to classpath on windows · vert-x3/vertx-web@9e3a783 · GitHubPatch;Vendor Advisory
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