Description (CNA)
Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Files#fail sets the Content-Length response header using String#size instead of String#bytesize. When the response body contains multibyte UTF-8 characters, the declared Content-Length is smaller than the number of bytes actually sent on the wire. Because Rack::Files reflects the requested path in 404 responses, an attacker can trigger this mismatch by requesting a non-existent path containing percent-encoded UTF-8 characters. This results in incorrect HTTP response framing and may cause response desynchronization in deployments that rely on the incorrect Content-Length value. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| rack / rack | affected < 2.2.23; affected >= 3.0.0.beta1, < 3.1.21; affected >= 3.2.0, < 3.2.6 |
CWE
CWE-130, CWE-135
References
ADP enrichment
No English description supplied.
No references supplied.