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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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18
Minecraft.World/ByteArrayOutputStream.cpp
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@ -53,9 +53,25 @@ void ByteArrayOutputStream::write(byteArray b, unsigned int offset, unsigned int
{
assert( b.length >= offset + length );
if (offset > b.length || length > b.length - offset)
{
return;
}
if (length > 0xFFFFFFFF - count)
{
return;
// If we will fill the buffer we need to make it bigger
if( count + length >= buf.length )
buf.resize( max( count + length + 1, buf.length * 2 ) );
{
unsigned int newSize = (std::max)(count + length + 1, buf.length * 2);
if (newSize <= buf.length)
{
return;
}
buf.resize(newSize);
}
XMemCpy( &buf[count], &b[offset], length );
//std::copy( b->data+offset, b->data+offset+length, buf->data + count ); // Or this instead?