org.apache.kylin:kylin-server@4.0.0 vulnerabilities

org.apache.kylin:kylin-server is an analytics Engine, contributed by eBay Inc., provides SQL interface and multi-dimensional analysis (OLAP) on Hadoop supporting extremely large datasets.

Affected versions of this package are vulnerable to Information Exposure due to the reflection of the Origin header, which allow credentials to be sent cross-origin in the default configuration.

PoC:

// request:

OPTIONS /kylin/api/projects HTTP/1.1
Host: localhost:7070
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:94.0) Gecko/20100101 Firefox/94.0
Accept: */*
Accept-Language: en-US
Accept-Encoding: gzip, deflate
Access-Control-Request-Method: POST
Access-Control-Request-Headers: content-type
Referer: http://b49b-95-62-58-48.ngrok.io/
Origin: http://b49b-95-62-58-48.ngrok.io
Connection: keep-alive
Cache-Control: max-age=0

// reply:

HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Access-Control-Allow-Origin: http://b49b-95-62-58-48.ngrok.io
Access-Control-Allow-Credentials: true
Vary: Origin
Access-Control-Allow-Methods: DELETE, POST, GET, OPTIONS, PUT
Access-Control-Allow-Headers: Authorization, Origin, No-Cache, X-Requested-With, Cache-Control, Accept, X-E4m-With, If-Modified-Since, Pragma, Last-Modified, Expires, Content-Type
Content-Length: 0

Upgrade org.apache.kylin:kylin-server to version 3.1.3, 4.0.1 or higher.