Fix vuln OSV-2024-343 (seladb#1680)

Author: oss-patch

Packet++/src/BgpLayer.cpp

@@ -542,6 +542,11 @@ namespace pcpp
 		if (headerLen >= minLen)
 		{
 			size_t withdrawnRouteLen = getWithdrawnRoutesLength();
+			// Ensure the memory access is within bounds
+			if (sizeof(bgp_common_header) + sizeof(uint16_t) + withdrawnRouteLen + sizeof(uint16_t) > headerLen)
+			{
+				return 0;  // Invalid access, return 0
+			}
 			uint16_t res =
 			    be16toh(*(uint16_t*)(m_Data + sizeof(bgp_common_header) + sizeof(uint16_t) + withdrawnRouteLen));
 			if ((size_t)res > headerLen - minLen - withdrawnRouteLen)