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check max frame size

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Benjamin Sergeant
2019-10-26 11:48:03 -07:00
parent ebb31b4e87
commit 499262f752
1 changed files with 7 additions and 0 deletions
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7
ixwebsocket/IXWebSocketTransport.cpp
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@@ -542,6 +542,13 @@ namespace ix
ws.masking_key[3] = 0; ws.masking_key[3] = 0;
} }
// Prevent integer overflow in the next conditional
const uint64_t maxFrameSize(1 << 63);
if (ws.N > maxFrameSize)
{
return;
}
if (_rxbuf.size() < ws.header_size + ws.N) if (_rxbuf.size() < ws.header_size + ws.N)
{ {
return; /* Need: ws.header_size+ws.N - _rxbuf.size() */ return; /* Need: ws.header_size+ws.N - _rxbuf.size() */