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Bug #5492

open

Applayer Detect protocol only one direction - Kerberos

Added by Orion Poplawski almost 3 years ago. Updated 21 days ago.

Status:
New
Priority:
Normal
Assignee:
OISF Dev
Target version:
TBD
Affected Versions:
8.0.0
Effort:
Difficulty:
Label:
Beginner, Good First Issue, Needs Suricata-Verify test, Protocol, Rust

Description

Some kerberos traffic between a Synology NAS and a Windows Active directory controller generates the following alert:

[**] [1:324000010:1] SURICATA Applayer Detect protocol only one direction (non-SMTP) [**] [Classification: Generic Protocol Command Decode] [Priority: 3] {TCP}

I can reproduce it with the attached pcap file.

Files

kerberos.pcap.xz (23.9 KB) kerberos.pcap.xz Orion Poplawski, 08/09/2022 02:59 PM
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 #1

Updated by Philippe Antoine over 1 year ago

Confirmed : rs_krb5_probing_parser only works for ASN1/BER whose length is less than 128 bytes

cf check of rem[2],rem[3],rem[4]

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 #2

Updated by Philippe Antoine 24 days ago

  • Affected Versions 8.0.0 added
  • Affected Versions deleted (6.0.4)
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 #3

Updated by Philippe Antoine 21 days ago

  • Label Beginner, Good First Issue, Needs Suricata-Verify test, Protocol, Rust added
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