CVE-2023-38493: Paths contain matrix variables bypass decorators
First published: Tue Jul 25 2023(Updated: )
### Impact Spring supports [Matrix variables](https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-controller/ann-methods/matrix-variables.html). When Spring integration is used, Armeria calls Spring controllers via `TomcatService` or `JettyService` with the path that may contain matrix variables. In this situation, the Armeria decorators might not invoked because of the matrix variables. Let's see the following example: ``` // Spring controller @GetMapping("/important/resources") public String important() {...} // Armeria decorator ServerBuilder sb = ... sb.decoratorUnder("/important/", authService); ``` If an attacker sends a request with `/important;a=b/resources`, the request would bypass the authrorizer ### Patches - https://github.com/line/armeria-ghsa-wvp2-9ppw-337j/commit/9b0ec3e099cc05fbff11d7f1012a1dddb0000d0c ### Workarounds Users can add decorators using regex. `e.g. "regex:^/important.*"`
Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| maven/com.linecorp.armeria:armeria | <=1.24.2 | 1.24.3 |
| Linecorp Armeria | <1.24.3 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://github.com/line/armeria/security/advisories/GHSA-wvp2-9ppw-337j
- https://github.com/line/armeria/commit/49e04ef231ad65750739529c7fa4ce946ff7588b
- https://nvd.nist.gov/vuln/detail/CVE-2023-38493
- https://github.com/line/armeria/commit/039db50bbfc88014ea8737fd1e1ddd6fd3fc4f07
- https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-controller/ann-methods/matrix-variables.html
- https://github.com/advisories/GHSA-wvp2-9ppw-337j (Advisory)
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2023-38493.
What is the impact of this vulnerability?
The impact of this vulnerability is that Armeria calls Spring controllers with a path that may contain matrix variables in an insecure manner.
What is the severity of CVE-2023-38493?
The severity of CVE-2023-38493 is high with a CVSS score of 7.5.
Which software is affected by CVE-2023-38493?
The Armeria microservice framework versions up to and including 1.24.2 are affected by CVE-2023-38493.
How do I fix CVE-2023-38493?
To fix CVE-2023-38493, upgrade to Armeria version 1.24.3 or later.
- collector/nvd-latest
- collector/github-advisory-latest
- alias/GHSA-wvp2-9ppw-337j
- alias/CVE-2023-38493
- collector/github-advisory
- collector/nvd-index
- collector/nvd-cve
- agent/type
- agent/first-publish-date
- agent/softwarecombine
- agent/references
- agent/remedy
- agent/weakness
- agent/severity
- agent/author
- agent/description
- collector/nvd-api
- agent/software-canonical-lookup-request
- agent/title
- agent/event
- agent/tags
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/trending
- package-manager/maven
- vendor/linecorp
- canonical/linecorp armeria