MQTT Security: A Novel Fuzzing Approach

Table 4

Publish packet variable header nonnormative example.

Byte position	Description
Topic name
Byte 1	Length MSB (0)
Byte 2	Length LSB (3)
Byte 3	“a” (0x61)
Byte 4	“/” (0x2F)
Byte 5	“b” (0x62)
Packet identifier
Byte 6	Packet identifier MSB (0)
Byte 7	Packet identifier LSB (10)