Snort mailing list archives
Re: snort2lua error
From: Russ <rucombs () cisco com>
Date: Wed, 14 Dec 2016 08:40:04 -0500
Hi Fabian, snort2lua is tripping over modbus_data. We will get a fix out ASAP. In the meantime, if you change the offset and depth for those contents to be comma separated instead of semicolon separated it will work: alert tcp $EXTERNAL_NET any -> $HOME_NET 502 (msg:"PROTOCOL-SCADA Tri PLC Nano 10 PLC denial of service attempt"; flow:to_server,established; content:"|00 06|"; depth:2; offset:4; modbus_func:1; modbus_data; content:"|00 00|", depth:2, offset:2; reference:cve,2013-2784; classtype:denial-of-service; sid:29965; rev:2;) Thanks for reporting the issue. Russ On 12/14/16 6:15 AM, koppfabi wrote:
Hi I encountered an error while converting the snapshot rules to snort3 rules. snort2lua gave me this message for the protocoll-scada.rules file : --[[ FAILED RULES CONVERSIONS: These rules has invalid rule options Failed to convert rule: alert tcp $EXTERNAL_NET any -> $HOME_NET 502 (msg:"PROTOCOL-SCADA Tri PLC Nano 10 PLC denial of service attempt"; flow:to_server,established; content:"|00 06|"; depth:2; offset:4; modbus_func:1; modbus_data; content:"|00 00|"; depth:2; offset:2; reference:cve,2013-2784; classtype:denial-of-service; sid:29965; rev:2;) ^^^^ unknown_option=depth ^^^^ unknown_option=offset --]] i guess depth and offeset are unknow...is there a way to fix this ? the script I used: #!/bin/bash # SNORT2LUA helper echo "Snort2Lua rule converter" mkdir -p new_rules for file in rules/*.rules do #remove header sed -i -e 1,20d $file #remove # and leading space (optional) sed -i 's/^#//;s/^[ \t]*//' $file name=${file##*/} base=${name%.rules} NEWNAME=new_${name} echo $name #-c source -r dest snort2lua -c $file -r new_rules/$NEWNAME done mfg Fabian ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
Current thread:
- snort2lua error koppfabi (Dec 14)
- Re: snort2lua error Russ (Dec 14)
- Re: snort2lua error Russ (Dec 16)
- Re: snort2lua error Russ (Dec 14)