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LCEMP RCE fixes

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Based on commit d017bfc30a68888bf5c79b23cf5c4f607cf828bf
This commit is contained in:
Loki Rautio
2026-03-09 04:45:14 -05:00
parent 0c4f459904
commit d557ca2dfb
27 changed files with 222 additions and 80 deletions
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6
Minecraft.World/BlockRegionUpdatePacket.cpp
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@@ -105,6 +105,12 @@ void BlockRegionUpdatePacket::read(DataInputStream *dis) //throws IOException
levelIdx = ( size >> 30 ) & 3;
size &= 0x3fffffff;
const int MAX_COMPRESSED_CHUNK_SIZE = 5 * 1024 * 1024;
if (size < 0 || size > MAX_COMPRESSED_CHUNK_SIZE)
{
size = 0;
}
if(size == 0)
{
buffer = byteArray();