MODBUS: Overlong Packet

This anomaly triggers when it detects Modbus/MBAP Length-header value over 256 bytes. Modbus over TCP exists on top of MBAP header (6 bytes). It is strongly recommended that a TCP frame transports only one Modbus ADU.

Short Name
SCADA:MODBUS:OVERLONG-PDU
Severity
Minor
Recommended
False
Recommended Action
None
Category
SCADA
Keywords
MODNUS OVERLONG
Release Date
01/22/2008
Supported Platforms

srx-branch-12.3

srx-19.3

srx-branch-19.3

vsrx3bsd-19.2

srx-branch-19.4

vsrx-19.4

mx-12.3

mx-19.4

vmx-19.4

mx-19.3

vsrx3bsd-19.4

srx-19.4

vsrx-12.3

vmx-19.3

vsrx-19.2

srx-12.3

Sigpack Version
3324
False Positive
Unknown

Found a potential security threat?