TCP: Options Error Unsolicited WSF

This protocol anomaly triggers when it detects a WSF (Window Scale Factor) option in a SYN-ACK packet, even though the SYN packet does not specify one (as required by RFC793). Because these ambiguous packets can be interpreted by the receiver in different, unpredictable ways, it is recommended to drop them.

Short Name
TCP:AUDIT:UNSOL-WSF
Severity
Info
Recommended
False
Recommended Action
None
Category
TCP
Keywords
FACTOR SCALE TCP UNSOLICITED WINDOW WSF
Release Date
04/22/2003
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

Found a potential security threat?