CVE-2023-38493
Paths contain matrix variables bypass decorators
Impact
### 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.*"`
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | com.linecorp.armeria:armeria | <= 1.24.2 | 1.24.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linecorp | Armeria | before 1.24.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-controller/ann-methods/matrix-variables.html
- https://github.com/line/armeria/commit/039db50bbfc88014ea8737fd1e1ddd6fd3fc4f07
- https://github.com/line/armeria/security/advisories/GHSA-wvp2-9ppw-337j
- https://github.com/advisories/GHSA-wvp2-9ppw-337j
- https://github.com/line/armeria/commit/49e04ef231ad65750739529c7fa4ce946ff7588b
- https://nvd.nist.gov/vuln/detail/CVE-2023-38493