Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Summary: The pmproxy REST API exposes a /store endpoint writing to any PMDA metric
via pmStore() without authentication. Two authentication flags (-S for credential
requirements, -Q for client certificate) exist as case blocks in the source but are absent from
the short_options string and longopts table, making both code paths permanently dead and
impossible to activate. Combined with an unrestricted hostspec parameter, an
unauthenticated HTTP attacker can force pmproxy to connect to pmcd via Unix socket,
bypassing all pmcd [access] host rules that cover only IPv4 and IPv6 transports.
Prerequisites: pmproxy running and reachable on default port 44322. pmcd running.
linux_sockets PMDA loaded (required for the full RCE chain with Vulnerability 3).