alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT Ghostscript illegal read undefinedfilename attempt"; flow:established,to_client; file.data; content:"undefinedfilename"; fast_pattern; content:"errordict"; content:"invalidfileaccess"; content:"typecheck"; pcre:"/errordict\s+\x2Finvalidfileaccess/smi"; reference:url,seclists.org/oss-sec/2018/q3/142; classtype:attempted-user; sid:2026087; rev:2; metadata:attack_target Client_Endpoint, created_at 2018_09_05, deployment Perimeter, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_14;)