Description
Distribution is a toolkit to pack, ship, store, and deliver container content. Prior to 3.1.0, in pull-through cache mode, distribution discovers token auth endpoints by parsing WWW-Authenticate challenges returned by the configured upstream registry. The realm URL from a bearer challenge is used without validating that it matches the upstream registry host. As a result, an attacker-controlled upstream (or an attacker with MitM position to the upstream) can cause distribution to send the configured upstream credentials via basic auth to an attacker-controlled realm URL. This vulnerability is fixed in 3.1.0.
Problem types
CWE-918: Server-Side Request Forgery (SSRF)
Product status
References
github.com/...bution/security/advisories/GHSA-3p65-76g6-3w7r
github.com/...bution/security/advisories/GHSA-3p65-76g6-3w7r