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wyuc
68aed2932a
* fix(proxy-media): connect only to addresses the SSRF guard validated The route validated a URL with validateUrlForSSRF and then handed the hostname to fetch(), which resolved it again at connect time. An attacker-controlled name could answer a public address to the guard and an internal address (loopback, RFC1918, link-local, cloud metadata) to the socket, and every redirect hop repeated the same validate-then-refetch gap. Add a shared policy-aware pinned dispatcher (lib/server/pinned-dispatcher.ts) whose connect.lookup resolves all addresses, runs the same local-network policy as validateUrlForSSRF over every answer (cloud metadata is always blocked, even with ALLOW_LOCAL_NETWORKS=true), and passes only the vetted list to the connection. proxy-media creates one dispatcher per request and uses it on every hop, mapping a connect-time refusal to 403 INVALID_URL instead of a generic 500. The agent-runtime pinned agent now reuses the same builder with its strict assertSafeIp policy unchanged. The other routes that validate with validateUrlForSSRF and then hand the URL to provider SDKs (parse-pdf, transcription, generate/*, verify-*, probe-models, azure-voices) are not covered; that is a follow-up. Tests: new tests/server/proxy-media-rebinding.test.ts covers the two-answer rebind, the ALLOW_LOCAL_NETWORKS opt-in through the pinned path, metadata refusal under the opt-in, and a redirect-hop rebind. * fix(proxy-media): destroy the per-request dispatcher and align non-unicast policy across layers Follow-up hardening for the proxy-media SSRF pin. 1. Handler hang: the route awaited `dispatcher.close()` in `finally`. undici's `close()` drains in-flight requests, and the response body is intentionally left unread on the 30x (`redirect: 'manual'`), non-2xx, oversize and connect-refusal paths, so an upstream that keeps its body open never completes and the POST never settles. Tear the pool down with a non-awaited `destroy()` instead; the response blob is already in memory by the time `finally` runs. Regression tests drive a loopback server that answers 404, a 30x, and an oversize 200 while trickling its body forever and assert the route settles in well under a second. 2. Headline rebinding test sensitivity: install an attacker-controlled global dispatcher (`setGlobalDispatcher` plus a lookup that always answers loopback) in `beforeEach` so the unpinned fetch path really reaches the loopback server. Removing the route's dispatcher now fails on `internal.requests() === 0` rather than on an unrelated DNS resolution error. The positive control also asserts the pinned connect lookup was invoked, so a runtime that silently ignores `init.dispatcher` goes red. 3. Non-unicast policy parity: `validateUrlForSSRF` only classified IP-literal URLs through `isPrivateIP`, so a literal in CGNAT 100.64/10 or an IANA reserved/special-use range (240/4, 198.18/15, the TEST-NET blocks, 192.0.0.0/24, multicast, broadcast) passed the URL layer while the same address reached through a hostname was refused at connect time. Both layers now share `isNeverAllowedRange`, applied to IP-literal URLs and to every resolved answer, with or without `ALLOW_LOCAL_NETWORKS`. `connectionAddressBlockReason` drops its blunt `range() !== 'unicast'` test so the two layers agree exactly, while private, loopback and link-local answers keep following the opt-in. Behaviour change: a hostname resolving into CGNAT 100.64/10 or an IANA reserved/special-use range is now refused (403 INVALID_URL) where it was previously proxied, including under `ALLOW_LOCAL_NETWORKS=true`, since these ranges are never legitimate proxy targets. 4. Do not echo an unparseable connect-time answer in the refusal. Return the generic block message instead of `Unable to classify network address: <value>`; the route relays that message to the client in a 403 body. Tests: new trickle-body regression tests and CGNAT/reserved cases for both literals and resolved answers, plus a `connectionAddressBlockReason` parity suite. One existing fixture is updated from the IANA documentation prefix 2001:db8::/32 (reserved) to a real public prefix 2001:4860::/32. * fix(ssrf-guard): let the local-network opt-in cover CGNAT and decode local-use NAT64 prefixes