CVE-2023-38493: Armeria Paths Contain Matrix Variables Bypass Vulnerability
HIGHCVE-2023-38493 is a HIGH (CVSS 7.5) paths contain matrix variables bypass vulnerability (CWE-863: Incorrect Authorization) affecting Armeria libraries in the Maven ecosystem. The issue involves paths contain matrix variables bypass decorators. Remediation is available by upgrading affected packages to version 1.24.3.
CVE-2023-38493 at a Glance
Security Impact
CVSS: 7.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
How to Fix CVE-2023-38493
To remediate this vulnerability, upgrade all affected Armeria dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>com.linecorp.armeria</groupId>
<artifactId>armeria</artifactId>
<version>1.24.3</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=com.linecorp.armeriaHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2023-38493, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=com.linecorp.armeriaAnalyze the terminal output to locate any version of Armeria in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.24.3), your application is affected.
Note: The mvn dependency:tree -Dincludes=com.linecorp.armeria command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In Armeria, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2023-38493 Affected Armeria Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
com.linecorp.armeria:armeria
|
Maven |
< 1.24.3
|
1.24.3
|
References
Frequently Asked Questions
What is CVE-2023-38493?
Which Armeria versions are affected?
What version fixes CVE-2023-38493?
Is armeria affected?
What is the CVSS score of CVE-2023-38493?
What CWE is associated with CVE-2023-38493?
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Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-wvp2-9ppw-337j",
"modified" : "2023-07-25T18:24:39Z",
"published" : "2023-07-25T18:24:39Z",
"aliases" : [ "CVE-2023-38493" ],
"summary" : "Paths contain matrix variables bypass decorators",
"details" : "### Impact\nSpring supports [Matrix variables](https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-controller/ann-methods/matrix-variables.html).\nWhen Spring integration is used, Armeria calls Spring controllers via `TomcatService` or `JettyService` with the path\nthat may contain matrix variables.\nIn this situation, the Armeria decorators might not invoked because of the matrix variables.\nLet's see the following example:\n```\n// Spring controller\n@GetMapping(\"/important/resources\")\npublic String important() {...}\n\n// Armeria decorator\nServerBuilder sb = ...\nsb.decoratorUnder(\"/important/\", authService);\n```\nIf an attacker sends a request with `/important;a=b/resources`, the request would bypass the authrorizer\n\n### Patches\n- https://github.com/line/armeria-ghsa-wvp2-9ppw-337j/commit/9b0ec3e099cc05fbff11d7f1012a1dddb0000d0c\n\n### Workarounds\nUsers can add decorators using regex. `e.g. \"regex:^/important.*\"`\n",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "com.linecorp.armeria:armeria"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1.24.3"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 1.24.2"
}
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/line/armeria/security/advisories/GHSA-wvp2-9ppw-337j"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-38493"
}, {
"type" : "WEB",
"url" : "https://github.com/line/armeria/commit/039db50bbfc88014ea8737fd1e1ddd6fd3fc4f07"
}, {
"type" : "WEB",
"url" : "https://github.com/line/armeria/commit/49e04ef231ad65750739529c7fa4ce946ff7588b"
}, {
"type" : "WEB",
"url" : "https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-controller/ann-methods/matrix-variables.html"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/line/armeria"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-863" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2023-07-25T18:24:39Z",
"nvd_published_at" : "2023-07-25T21:15:10Z"
}
}