Core/Misc: Throw an exception if client sends invalid float/double data

Throw a ByteBufferException if client sends 1.#INF0000, 1.#QNAN000, 1.#IND0000 or other invalid float/double values.
Handle this invalid values in StaticMapTree::isInLineOfSight() to avoid triggering an assert.
Fixes #12126

1 files changed, 4 insertions, 0 deletions

diff --git a/src/server/shared/Packets/ByteBuffer.h b/src/server/shared/Packets/ByteBuffer.h
index dd0a9d5fdf4..e06556423aa 100644
--- a/src/server/shared/Packets/ByteBuffer.h
+++ b/src/server/shared/Packets/ByteBuffer.h
@@ -241,12 +241,16 @@ class ByteBuffer
         ByteBuffer &operator>>(float &value)
         {
             value = read<float>();
+            if (!isfinite(value))
+                throw ByteBufferException();
             return *this;
         }
 
         ByteBuffer &operator>>(double &value)
         {
             value = read<double>();
+            if (!isfinite(value))
+                throw ByteBufferException();
             return *this;
         }