6e37b533244047babf0199fe1a149877c65cb7f2
5
Commits
| Author | SHA1 | Message | Date | |
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  Thomas GöttgensandGitHub
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6f522aad17 |
Return the secret sentinel for remote admin config gets (#11093)
writeSecret is a setter, so calling it on the NETWORK_CONFIG get path was a no-op: the buffer already holds the stored psk, never the sentinel. MQTT_CONFIG returned the broker password verbatim. Both get paths now return secretReserved when req.from != 0, and the matching set paths call writeSecret so a read-modify-write round trip keeps the stored value. |
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Thomas GöttgensandGitHub
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8147970957 |
AdminModule: only accept admin responses to requests we sent (#11024)
* AdminModule: only accept admin responses to requests we sent An admin *_response short-circuited the auth and session-passkey checks that gate every other admin message, so any node could deliver one. On a channel the module listens to unauthenticated, a get_module_config_response drives the remote-hardware pin handler with attacker-supplied values. Track the destination of outgoing admin requests (per remote, with the pinned PKC key when there is one) and accept a response only from a node with a matching outstanding request, inside the same window as the session passkey. Local (from == 0) admin is unchanged; PhoneAPI already gates it. Also fix the response dispatch: get_module_config_response.which_payload_variant is a ModuleConfig oneof tag, but it was compared against the AdminMessage ModuleConfigType enum (different numbering), so the handler never ran. Compare against the oneof tag. * AdminModule: rollover-safe request window, bind response to request type Two review refinements to the request/response pairing: Use Throttle::isWithinTimespanMs for the outstanding-request expiry instead of comparing millis()/1000 sums, which mis-expired across the millis() rollover. Bind each accepted response to a request type actually sent to that node. Each outstanding record now carries a bitmask of the response variants its requests authorize, so a get_owner request no longer admits a get_module_config response. The mask accumulates per remote, so a client may still pipeline several request types to one node and have every answer accepted. * AdminModule: track admin requests per-request, not per-node Reworks the outstanding-request table so each request is its own entry with its own expiry window and pinned key, replacing the per-node bitmask that shared one timestamp and one key across every response variant. That sharing let a later request to the same node extend an earlier one's window and, worse, clear its PKC pin: an unpinned request cleared keyValid, so a plaintext response to an earlier PKC-pinned request was then accepted. Per-request entries keep each pin intact. Identical requests are de-duplicated (a client may fetch several config subtypes, all answered by one response variant) and eviction compares elapsed time, which is rollover-safe. Test: a pinned request's response still requires its key after an unpinned request to the same node. * AdminModule: match module-config subtype and consume answered requests Two refinements to the request/response pairing: Only remote_hardware get_module_config_response mutates state (the pin table), so it must answer a request for that exact ModuleConfigType, not just any module-config request. Each entry records the requested subtype and the gate checks it. A matched request is now consumed on accept, so a node cannot replay a state-mutating response within the window. Because one request yields one response, request de-dup is dropped (a client's N indexed get_channel requests are N entries, each consumed once). Tests: a non-remote-hardware request does not admit a remote_hardware response, and a second copy of an answered response is rejected. |
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Thomas GöttgensandGitHub
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d3d02af817 |
AdminModule: don't return the device private key to remote config reads (#11030)
A SECURITY_CONFIG get_config response copied config.security verbatim, so a remote request was answered with the device identity private_key and sent over the air. Only the local owner needs it, for backup. Zero private_key in the SECURITY_CONFIG response when the request is remote (from != 0); the local BLE/USB/TCP path (from == 0) still receives it. public_key and admin_key are public and stay as they were. |
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952c825167 |
Allow key verification to work for unknown nodes. (#10669)
* Allow key verification to work for unknown nodes. * trunk * More reliable admin key decryption * Add admin key fallback tests * Actually check haveRemoteKey * Logging cleanup * Address review feedback - Persist the committed key + manually-verified flag in commitVerifiedRemoteNode via saveToDisk(SEGMENT_NODEDATABASE), replacing the "todo: initiate save" - Guard the CryptoEngine pending-key slot with a dedicated internal lock; the Router reads it while already holding the non-recursive cryptLock, so the accessors cannot reuse that lock - Draw the security number from the hardware RNG (CryptRNG fallback) under cryptLock instead of random(); on nRF52 the entropy fill toggles the same CC310 the BLE task's packet crypto uses - Return true after fully handling the hash2 response (restores develop behavior; consistent with the hash1 branch) - Take uint32_t in the number-picker callbacks so 8-digit hex nodenums can't truncate through int - Trim over-long comments flagged by review * feat(tests): add deterministic tests for admin session-key behavior --------- Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Co-authored-by: Ben Meadors <benmmeadors@gmail.com> |
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d846780a9b |
More fuzz tests and small fixes for the findings (#10864)
* first pass tests * more tests * Fix two crafted-admin-packet crashes found by the E5 fuzzer Both are reachable from an authorized admin (local from==0, admin channel, or PKC) - remote DoS: 1. SIGFPE in LoRa config validation. A set_config LoRaConfig with use_preset=false and bandwidth=0 makes freqSlotWidth 0, so numFreqSlots is 0 and `hash(name) % numFreqSlots` (RadioInterface.cpp) divides by zero. Guard the modulo; the existing channel_num check then rejects/ clamps the config. 2. Stack overflow in Channels::getKey. A SECONDARY channel at the primary slot with an empty PSK recursed into getKey(primaryIndex) forever. Skip the primary-key borrow when chIndex == primaryIndex. Re-enable the E5 admin fuzzer to hit both triggers again (use_preset both ways incl. bandwidth 0, plus the set_channel tag) as regression guards. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * Correct fuzz-test invariants after the crash fixes - E5 admin fuzz: node eviction under a filling NodeDB is legitimate, so assert only the bounded-count invariant, not that a specific seed node survives 6000 mutating ops. - TMM blitz: scope off the nodeinfo direct-response send path (it needs a fully-wired MeshService/phone queue the fixture doesn't provide; the deterministic directResponse tests cover it). The crafted-nodenum rate/unknown/position cache stress is unchanged. clod helped too * realistic tests * test: dedup fuzz RNG into shared test/support/DeterministicRng.h The four in-tree fuzz suites (test_fuzz_decode, test_fuzz_packets, test_hop_scaling, test_traffic_management) each carried a byte-identical copy of the seeded 64-bit LCG (rngSeed/rngNext/rngByte/rngRange). Hoist it into one shared header so there is a single generator to reason about and no risk of the copies drifting. static inline keeps per-suite state per translation unit and avoids -Wunused-function for suites that don't use every helper. Also corrects a stale comment in test_traffic_management (the blitz's nodeinfo direct-response path is intentionally left off). No behavioral change: same constants, same per-suite seeds. clod helped too * test: fuzz uncovered ProtobufModule handlers and the MQTT downlink ingress Extend the in-tree fuzz coverage to packet sources that previously had none: - test_fuzz_packets E8/E9/E10: drive PositionModule, DeviceTelemetryModule and NeighborInfoModule at handleReceivedProtobuf directly (via using-shims, bypassing the ProtobufModule reply/send path so no router is needed). The fixture already stands up nodeDB/service/channels, and nodeStatus/powerStatus are auto-initialized in main.cpp, so no new globals are required. Adds a shared fuzzRxHeader() helper for crafting adversarial RX packet headers. - test_fuzz_decode: add meshtastic_KeyVerification to the decode table. The KeyVerification and StoreForward handler paths are documented as decode-level only, with the concrete reason each is intrinsic (private-state gating / PSRAM + self-pointer wiring), not a fixture gap. - test_mqtt: test_receiveFuzzServiceEnvelope blitzes the non-RF broker-push ingress (onReceiveProto) two ways - raw garbage bytes that must fail envelope decode cleanly, and a well-formed ServiceEnvelope wrapping a crafted inner MeshPacket over crafted channel_id/gateway_id - exercising the channel match, isFromUs, XEdDSA receive policy and perhapsDecode chain. Adds a deliverRaw() passthrough to MQTTUnitTest. All under the coverage env (ASan/LSan). No firmware/src changes. Full sweep GREEN 27/27, 544 cases. clod helped too * Harden LoRa/channel config against crafted admin messages; consolidate test helpers Production (review findings on the hot-fuzz crash fixes): - Clamp bandwidth at the source (clampBandwidthKHz) in checkOrClampConfigLora and applyModemConfig so numFreqSlots can never be 0 for any consumer; a bandwidth-0 set_config previously passed validation and re-armed the SIGFPE on the next applyModemConfig. - Guard applyModemConfig's hash % numFreqSlots (the validator's sibling modulo was fixed earlier but this one was still unguarded). - Enforce the primary-channel invariant in Channels::onConfigChanged: a config demoting every slot now re-promotes the stale SECONDARY slot (keeping its key) or restores the default channel if the slot is DISABLED, instead of leaving every getPrimaryIndex() reader on a non-primary slot. The getKey recursion guard stays as defense-in-depth. Tests: - New test/support/MockMeshService.h and AdminModuleTestShim.h replace four byte-identical mocks and three divergent admin shims (test_mqtt's capturing mock is genuinely different and stays). - DeterministicRng.h: add rngFill() (replaces 14 hand-rolled fill loops) and rngEdgeNodeNum() (unifies the three NodeNum boundary pools). - Extract fuzzChannelSettings() shared by the set_channel case and fuzzBeacon. - fuzzBeacon: the un-terminated branch now fills the whole buffer with non-NUL bytes so the strnlen bound is actually stressed (~50% of iterations, not ~4%). - E6 beacon fuzz: replace the TEST_ASSERT_TRUE(true) tautology with real invariants (handler never consumes; offers land in lastReceivedOffer keyed to the sender). - Trim the seven over-long comment blocks flagged against the 1-2 line rule; the FINDINGS trailer moves to this commit message (see production notes). Full native suite GREEN 27/27 under the coverage (ASan/LSan) env. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * Clamp UTF-8 char length in the emote walkers; add test_fuzz_emotes A TEXT_MESSAGE payload is opaque protobuf bytes, so PB_VALIDATE_UTF8 never screens it - invalid UTF-8 and truncated multi-byte lead bytes reach the emote/width render path verbatim. EmoteRenderer's walkers advanced by utf8CharLen(lead) without clamping to the bytes actually remaining, so a truncated lead (e.g. a lone 0xF0, which claims 4 bytes) near the end of the buffer made getUtf8ChunkWidth's memcpy read past the string. ASan confirms a heap-buffer-overflow READ from measureStringWithEmotes. Add utf8CharLenClamped() and use it at every walk site (width measure, truncation cut-loop, and the draw-path text-run/chunk builders); the one already-guarded site (matchAtIgnoringModifiers) is unchanged. New test/test_fuzz_emotes drives measureStringWithEmotes and truncateToWidth over adversarial byte strings (biased to embed/end in truncated multi-byte leads) in exact-sized heap buffers so any over-read is a hard ASan fault. Its headless display uses a synthetic font (firstChar 0, fontData centered in a large buffer) so the stock OLEDDisplay::getStringWidth - which indexes the font jump table with a signed char and over-reads for any byte >= 0x80 - does not mask the finding. native-suite-count bumped 27 -> 28. Full native suite GREEN 28/28 under the coverage (ASan/LSan) env. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * Keep emote width measurement in-bounds for non-ASCII bytes OLEDDisplay::getStringWidth (the utf8=false path EmoteRenderer uses on default builds) indexes the font jump table by (c - firstChar) with a signed char and no bounds check, so any byte outside printable ASCII - high bytes from UTF-8 text, but also a stray control byte like 0x0A - reads outside the font array. On-device this reads adjacent flash and returns a garbage width; under ASan the test_fuzz_emotes fuzzer flags it as a global-buffer-overflow, and it made the non-ASCII width measurement meaningless either way. The OLED driver is a pinned upstream dependency, so guard it firmware-side in EmoteRenderer's getStringWidth helper: measure a sanitized copy where any byte outside [0x20, 0x7E] counts as a '?' placeholder. Printable ASCII is unchanged and the UA/RU lookup path is untouched. test_fuzz_emotes now drives a real ArialMT font instead of the synthetic in-bounds font it needed before this fix, so the suite exercises the true production width path (utf8CharLen clamp + this sanitizer) end to end. The same fuzzer tripped the global-buffer-overflow before this change. Full native suite GREEN 28/28 under the coverage (ASan/LSan) env. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Fable 5 <noreply@anthropic.com> |