[Oisf-devel] FN on http POST query suricata v1.2.1?

rmkml rmkml at yahoo.fr
Wed Apr 18 23:58:49 UTC 2012


Hi,

Im restart my Suricata (v1.2.1 and 1.3git) testing and Im found strange results with these sigs not fire:

alert tcp any any -> any 80 (msg:"FN suricata"; flow:to_server,established; isdataat:1; classtype:web-application-activity; sid:90011667; rev:1;)

alert tcp any any -> any 80 (msg:"FN suricata"; flow:to_server,established; pcre:"/^[^\n]{5}/P"; classtype:web-application-activity; sid:90011668; rev:1;)

alert tcp any any -> any 80 (msg:"FN suricata"; flow:to_server,established; content:"galid"; nocase; http_client_body; classtype:web-application-activity; sid:90011669; rev:1;)


Tested with these two http commands:
  wget http://192.168.1.1/abcd.php --post-data="galid=abcdzad&dzadzza=dzadzdza"
  curl http://192.168.1.1/abcd.php --data "galid=abcdzad&dzadzza=dzadzdza"

Joigned my two pcap for replaying.
No suricata error.
Disabled cksum validation.

Im sure Im totaly wrong but if someone check/confirm please ? if ok Im open a new redmine ticket.
Of course, snort always fire.
Regards
Rmkml

http://twitter.com/rmkml
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