TCP: C2S Ambiguity Mismatching Overlapping Data
This protocol anomaly triggers when it detects a TCP segment retransmission from the client to server in which the retransmitted data differs from the original data. This is a common IDS evasion attack; do not allow these packets to pass IDP.
Extended Description
The impact depends on how the implementation handles this kind of anomalous packet.
Short Name
TCP:C2S:AMBIG:OLAP-MISMATCH
Severity
Critical
Recommended
False
Recommended Action
Drop Packet
Category
TCP
Release Date
08/27/2003
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