Authorization Bypass Through User-Controlled Key Affecting github.com/zeromicro/go-zero/rest/internal/cors package, versions <1.5.1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMZEROMICROGOZERORESTINTERNALCORS-6371516
- published5 Mar 2024
- disclosed4 Mar 2024
- creditcokeBeer
Introduced: 4 Mar 2024
CVE-2024-27302 (opens in a new tab)How to fix?
Upgrade github.com/zeromicro/go-zero/rest/internal/cors to version 1.5.1 or higher.
Overview
Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key due to the improper input validation in the CORS Filter feature. An attacker can bypass CORS policy and make requests to retrieve data on behalf of other users by using a domain that has a suffix matching an allowed domain in the CORS policy.
PoC
package main
import (
"errors"
"net/http"
"github.com/zeromicro/go-zero/rest"
)
func main() {
svr := rest.MustNewServer(rest.RestConf{Port: 8888}, rest.WithRouter(mockedRouter{}), rest.WithCors("safe.com"))
svr.Start()
}
type mockedRouter struct{}
// some sensitive path
func (m mockedRouter) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// check user's cookie
// ...
// return sensitive data
w.Write([]byte("social_id: 420101198008292930"))
}
func (m mockedRouter) Handle(_, _ string, handler http.Handler) error {
return errors.New("foo")
}
func (m mockedRouter) SetNotFoundHandler(_ http.Handler) {
}
func (m mockedRouter) SetNotAllowedHandler(_ http.Handler) {
}