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* PAYLOAD_TYPE_PATH bad path_len now rejected

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Scott Powell
2026-06-13 18:19:41 +10:00
parent 5f3b7f25d0
commit d5f74e93c5
1 changed files with 4 additions and 0 deletions
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src/Mesh.cpp
+4
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@@ -155,6 +155,10 @@ DispatcherAction Mesh::onRecvPacket(Packet* pkt) {
if (pkt->getPayloadType() == PAYLOAD_TYPE_PATH) { if (pkt->getPayloadType() == PAYLOAD_TYPE_PATH) {
int k = 0; int k = 0;
uint8_t path_len = data[k++]; uint8_t path_len = data[k++];
if (!Packet::isValidPathLen(path_len)) {
MESH_DEBUG_PRINTLN("%s PAYLOAD_TYPE_PATH, bad path_len: %u", getLogDateTime(), (uint32_t)path_len);
break; // reject bad encoding
}
uint8_t hash_size = (path_len >> 6) + 1; uint8_t hash_size = (path_len >> 6) + 1;
uint8_t hash_count = path_len & 63; uint8_t hash_count = path_len & 63;
uint8_t* path = &data[k]; k += hash_size*hash_count; uint8_t* path = &data[k]; k += hash_size*hash_count;