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Short Name

MS-RPC:ERR:INV-AUTH-PAD-LEN

Severity

High

Recommended

No

Category

MS-RPC

Release Date

2004/02/24

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+

MS-RPC: Invalid Authentication Pad Length


This protocol anomaly is an Microsoft Remote Procedure Call (MSRPC) message with authentication padding length plus authentication section length that is larger than the entire MSRPC message payload length. Detecting this anomaly can indicate a malicious user might be attacking your system.

Extended Description

MSRPC messages whose authentication padding length plus authentication section length are longer than the length of the message are protocol anomalies and should be detected.

References

  • URL: http://windowssdk.msdn.microsoft.com/en-us/library/ms719418.aspx
  • URL: http://en.wikipedia.org/wiki/MSRPC

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