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Short Name

SMB:NETBIOS:INV-SHDR-LEN

Severity

High

Recommended

No

Category

SMB

Release Date

2003/04/22

Update Number

1213

Supported Platforms

di-5.3+, idp-4.0+, isg-3.0+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+

SMB: Invalid Session Header Length


This protocol anomaly is an invalid session header length in the NETBIOS header that encapsulates an SMB. The minimum length of an SMB message is 33 bytes.

Extended Description

This condition could indicate a network configuration error or that an attack involving the injection of malformed NetBIOS datagrams is underway.

References

  • URL: http://www.faqs.org/rfcs/rfc1001.html
  • URL: http://www.faqs.org/rfcs/rfc1002.html
  • URL: http://samba.anu.edu.au/cifs/docs/what-is-smb.html

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