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Low 32 Monero

fix: ltc wallets not syncing (address generation issue) (#2676)

Public commit record

What the developer wrote

Authored by cyan

85/100 · Strong
fix: ltc wallets not syncing (address generation issue) (#2676)

* fix: ltc freezing and address generation

* revert: go back to network (fixme), feeRatePerKb
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides an explanatory body✓ Links an issue, advisory, or supporting reference
The short version

What changed, and why it matters

This commit fixes Litecoin wallet syncing and address-generation problems in Cake Wallet. It swaps the MWEB helper service from a Unix-domain socket to a TCP loopback socket, regenerates the matching protobuf bindings, and hardens Dart code so that missing or empty MWEB secrets no longer crash the app. It also filters out empty addresses when fetching balances and makes script-hash failures return an empty string instead of throwing. The changes are framed by the vendor as a bug fix, not a security fix.

Recommended action

Treat as a routine bug-fix commit with minor security side effects. Review whether the 32-zero-byte fallback for MWEB secrets is ever reachable in production, because predictable scan/spend secrets would break MWEB privacy and could allow fund theft. Verify that the new TCP loopback gRPC port is bound only to 127.0.0.1 and is not exposed to other apps or the network. Confirm the dependency bump does not introduce breaking changes. Remove the leftover debug print `printV('aaaaaa')`.

Security signals we found

01

Local gRPC service moved from Unix-domain socket to TCP loopback (127.0.0.1), slightly widening the local attack surface

02

MWEB scan/spend secrets can now fall back to 32 zero bytes when derivation fails, which may produce predictable/weak key material if the fallback is actually used

03

Balance fetch now filters empty addresses, reducing the chance of querying invalid script hashes

04

Script-hash generation failures are swallowed instead of crashing, which could mask malformed addresses

05

Dependency bump for ltcmweb/mwebd and ltcmweb/ltcd (no changelog supplied in the diff)

Risk score

Why this scored 32/100

Our methodology →
Potential impact 8/30
Exploitability 5/25
Stealth signal 4/15
Affected reach 6/15
Confidence 6/10
Evidence quality 3/5
Human-validated context

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