<185>Jun  5 05:21:57 WAFirewall CEF:0|Barracuda|WAF|1220|152|METOSCORPARACTER_IN_PARAMETER|1|cat=WF dst=23.113.104.141 dpt=443 act=DENY msg=[token\="%00 " Parameter\="skin" value\="../../../../../../../../../etc/passwd"] duser="-" src=101.255.253.240 spt=44174 requestMethod=GET app=TLSv1.3 requestContext="-" start=Jun 05 2024 05:21:57  rt=1717582917452  request=/res/I18nMsg,AjxMsg,ZMsg,ZmMsg,AjxKeys,ZmKeys,ZdMsg,Ajx%20TemplateMsg.js.zgz requestClientApplication="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.0 Safari/605.1.15" dvchost=WAFirewall externalId=18fe7eb6f4b-dec909e5 cn2=44174 cn2Label=ProxyPort cs1=security-policy cs1Label=RuleID cs2=NONE cs2Label=FollowUpAction cs3=GLOBAL cs3Label=RuleType cs4=Other Attacks cs4Label=AttackGroup cs5=101.255.253.240 cs5Label=ProxyIP cs6="-" cs6Label=SessionID 

This is a syslog message from a product called Barracuda WAF by Barracuda. The following fields were extracted from the message:
action: block
clientport: 44174
facilitycode: 23
facilitylabel: local7
fqdn: /res/I18nMsg,AjxMsg,ZMsg,ZmMsg,AjxKeys,ZmKeys,ZdMsg,Ajx%20TemplateMsg.js.zgz
localhostname: WAFirewall
localstarttime: 1717582917452 
messagetype: METACHARACTER_IN_PARAMETER
priority: 185
senderhost: 10.0.0.250
sensitivity: normal
serverport: 443
severitycode: 9
severitylabel: alert
sourceinfo: unknown
tags: ['RuleType:GLOBAL', 'barracuda_waf', 'rfc3164', 'barracuda_waf_METACHARACTER_IN_PARAMETER', 'AttackGroup:Other Attacks', 'cef', 'ProxyIP:64.23.234.67', 'RuleID:security-policy', 'SessionID:-', 'METACHARACTER_IN_PARAMETER', 'FollowUpAction:NONE']
vendorcode: 152
streamName: barracuda_waf
clientIP: 101.255.253.240
serverIP: 23.113.104.141
userName: -