alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP find overflow attempt"; flow:established,to_server; content:"FIND"; nocase; isdataat:100,relative; pcre:"/\sFIND\s[^\n]{100}/smi"; reference:bugtraq,1110; reference:cve,2000-0284; reference:nessus,10374; classtype:misc-attack; sid:1904; rev:7;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP partial body buffer overflow attempt"; flow:to_server,established; content:"PARTIAL"; nocase; content:"BODY["; distance:0; nocase; pcre:"/\sPARTIAL.*BODY\[[^\]]{1024}/smi"; reference:bugtraq,4713; reference:cve,2002-0379; classtype:misc-attack; sid:1755; rev:14;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP partial body.peek buffer overflow attempt"; flow:to_server,established; content:"PARTIAL"; nocase; content:"BODY.PEEK["; distance:0; nocase; pcre:"/\sPARTIAL.*BODY\.PEEK\[[^\]]{1024}/smi"; reference:bugtraq,4713; reference:cve,2002-0379; classtype:misc-attack; sid:2046; rev:6;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP create buffer overflow attempt"; flow:to_server,established; content:"CREATE"; isdataat:1024,relative; pcre:"/\sCREATE\s[^\n]{1024}/smi"; reference:bugtraq,7446; classtype:misc-attack; sid:2107; rev:3;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP create literal buffer overflow attempt"; flow:to_server,established; content:"CREATE"; nocase; pcre:"/\sCREATE\s*\{/smi"; byte_test:5,>,256,0,string,dec,relative; reference:bugtraq,7446; classtype:misc-attack; sid:2120; rev:3;)# alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP login brute force attempt"; flow:to_server,established; content:"LOGIN"; nocase; threshold:type threshold, track by_dst, count 30, seconds 30; classtype:suspicious-login; sid:2273; rev:2;)alert tcp $EXTERNAL_NET any -> $HOME_NET 993 (msg:"IMAP SSLv3 invalid data version attempt"; flow:to_server,established; flowbits:isnotset,sslv2.client_hello.request; flowbits:isnotset,sslv3.client_hello.request; flowbits:isnotset,tlsv1.client_hello.request; content:"|16 03|"; depth:2; content:"|01|"; depth:1; offset:5; content:!"|03|"; depth:1; offset:9; reference:bugtraq,10115; reference:cve,2004-0120; reference:nessus,12204; reference:url,www.microsoft.com/technet/security/bulletin/MS04-011.mspx; classtype:attempted-dos; sid:2497; rev:9;)alert tcp $EXTERNAL_NET any -> $HOME_NET 993 (msg:"IMAP PCT Client_Hello overflow attempt"; flow:to_server,established; flowbits:isnotset,sslv2.server_hello.request; flowbits:isnotset,sslv3.server_hello.request; flowbits:isnotset,tlsv1.server_hello.request; content:"|01|"; depth:1; offset:2; byte_test:2,>,0,5; byte_test:2,!,0,7; byte_test:2,!,16,7; byte_test:2,>,20,9; content:"|8F|"; depth:1; offset:11; byte_test:2,>,32768,0,relative; reference:bugtraq,10116; reference:cve,2003-0719; reference:url,www.microsoft.com/technet/security/bulletin/MS04-011.mspx; classtype:attempted-admin; sid:2517; rev:13;)alert tcp $EXTERNAL_NET any -> $HOME_NET 993 (msg:"IMAP SSLv3 Client_Hello request"; flow:to_server,established; flowbits:isnotset,sslv2.client_hello.request; flowbits:isnotset,sslv3.client_hello.request; flowbits:isnotset,tlsv1.client_hello.request; content:"|16 03 00|"; depth:3; content:"|01|"; depth:1; offset:5; flowbits:set,sslv3.client_hello.request; flowbits:noalert; classtype:protocol-command-decode; sid:2529; rev:6;)alert tcp $HOME_NET 993 -> $EXTERNAL_NET any (msg:"IMAP SSLv3 Server_Hello request"; flow:to_client,established; flowbits:isset,sslv3.client_hello.request; content:"|16 03 00|"; depth:3; content:"|02|"; depth:1; offset:5; flowbits:set,sslv3.server_hello.request; flowbits:noalert; classtype:protocol-command-decode; sid:2530; rev:6;)alert tcp $EXTERNAL_NET any -> $HOME_NET 993 (msg:"IMAP SSLv3 invalid Client_Hello attempt"; flow:to_server,established; flowbits:isset,sslv3.server_hello.request; content:"|16 03|"; depth:2; content:"|01|"; depth:1; offset:5; reference:cve,2004-0120; reference:nessus,12204; reference:url,www.microsoft.com/technet/security/bulletin/MS04-011.mspx; classtype:attempted-dos; sid:2531; rev:6;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP login literal format string attempt"; flow:established,to_server; content:"LOGIN"; nocase; pcre:"/\sLOGIN\s\w+\s\{\d+\}[\r]?\n[^\n]*?%/smi"; reference:bugtraq,10976; classtype:attempted-admin; sid:2665; rev:2;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP login format string attempt"; flow:established,to_server; content:"LOGIN"; nocase; pcre:"/\sLOGIN\s[^\n]*?%/smi"; reference:bugtraq,10976; classtype:attempted-admin; sid:2664; rev:2;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP delete overflow attempt"; flow:established,to_server; content:"DELETE"; nocase; isdataat:100,relative; pcre:"/\sDELETE\s[^\n]{100}/smi"; reference:bugtraq,11675; classtype:misc-attack; sid:3007; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP delete literal overflow attempt"; flow:established,to_server; content:"DELETE"; nocase; pcre:"/\sDELETE\s[^\n]*?\{/smi"; byte_test:5,>,100,0,string,dec,relative; reference:bugtraq,11675; classtype:misc-attack; sid:3008; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP subscribe overflow attempt"; flow:established,to_server; content:"SUBSCRIBE"; nocase; isdataat:100,relative; pcre:"/\sSUBSCRIBE\s[^\n]{100}/smi"; reference:bugtraq,11775; classtype:misc-attack; sid:3074; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP unsubscribe overflow attempt"; flow:established,to_server; content:"UNSUBSCRIBE"; nocase; isdataat:100,relative; pcre:"/\sUNSUBSCRIBE\s[^\n]{100}/smi"; reference:bugtraq,11775; classtype:misc-attack; sid:3076; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP unsubscribe literal overflow attempt"; flow:established,to_server; content:"UNSUBSCRIBE"; nocase; pcre:"/\sUNSUBSCRIBE\s[^\n]*?\s\{/smi"; byte_test:5,>,256,0,string,dec,relative; reference:bugtraq,11775; classtype:misc-attack; sid:3075; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP append overflow attempt"; flow:established,to_server; content:"APPEND"; nocase; isdataat:100,relative; pcre:"/\sAPPEND\s[^\n]{256}/smi"; reference:bugtraq,11775; classtype:misc-attack; sid:3066; rev:2;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP copy literal overflow attempt"; flow:established,to_server; content:"COPY"; nocase; pcre:"/\sCOPY\s[^\n]*?\{/smi"; byte_test:5,>,1024,0,string,dec,relative; reference:bugtraq,1110; classtype:misc-attack; sid:3058; rev:1;)# alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP append literal overflow attempt"; flow:established,to_server; content:"APPEND"; nocase; pcre:"/\sAPPEND\s[^\n]*?\s\{/smi"; byte_test:5,>,256,0,string,dec,relative; reference:bugtraq,11775; classtype:misc-attack; sid:3065; rev:2;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP status overflow attempt"; flow:established,to_server; content:"STATUS"; nocase; isdataat:100,relative; pcre:"/\sSTATUS\s[^\n]{100}/smi"; reference:bugtraq,11775; reference:bugtraq,13727; reference:cve,2005-1256; classtype:misc-attack; sid:3072; rev:2;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP fetch overflow attempt"; flow:established,to_server; content:"FETCH"; nocase; isdataat:256,relative; pcre:"/\sFETCH\s[^\n]{256}/smi"; reference:bugtraq,11775; classtype:misc-attack; sid:3070; rev:2;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP examine literal overflow attempt"; flow:established,to_server; content:"EXAMINE"; nocase; pcre:"/\sEXAMINE\s[^\n]*?\s\{/smi"; byte_test:5,>,256,0,string,dec,relative; reference:bugtraq,11775; classtype:misc-attack; sid:3067; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP fetch literal overflow attempt"; flow:established,to_server; content:"FETCH"; nocase; pcre:"/\sFETCH\s[^\n]*?\s\{/smi"; byte_test:5,>,256,0,string,dec,relative; reference:bugtraq,11775; classtype:misc-attack; sid:3069; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP subscribe literal overflow attempt"; flow:established,to_server; content:"SUBSCRIBE"; nocase; pcre:"/\sSUBSCRIBE\s[^\n]*?\s\{/smi"; byte_test:5,>,256,0,string,dec,relative; reference:bugtraq,11775; classtype:misc-attack; sid:3073; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP status literal overflow attempt"; flow:established,to_server; content:"STATUS"; nocase; pcre:"/\sSTATUS\s[^\n]*?\s\{/smi"; byte_test:5,>,256,0,string,dec,relative; reference:bugtraq,11775; classtype:misc-attack; sid:3071; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 143 (msg:"IMAP examine overflow attempt"; flow:established,to_server; content:"EXAMINE"; nocase; isdataat:100,relative; pcre:"/\sEXAMINE\s[^\n]{100}/smi"; reference:bugtraq,11775; classtype:misc-attack; sid:3068; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 993 (msg:"IMAP TLSv1 Client_Hello request"; flow:to_server,established; flowbits:isnotset,sslv2.client_hello.request; flowbits:isnotset,sslv3.client_hello.request; flowbits:isnotset,tlsv1.client_hello.request; content:"|16 03 01|"; depth:3; content:"|01|"; depth:1; offset:5; flowbits:set,tlsv1.client_hello.request; flowbits:noalert; classtype:protocol-command-decode; sid:3489; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 993 (msg:"IMAP SSLv2 Client_Hello request"; flow:to_server,established; flowbits:isnotset,sslv2.client_hello.request; flowbits:isnotset,sslv3.client_hello.request; flowbits:isnotset,tlsv1.client_hello.request; byte_test:1,>,127,0; content:"|01|"; depth:1; offset:2; content:"|00 02|"; depth:2; offset:5; flowbits:set,sslv2.client_hello.request; flowbits:noalert; classtype:protocol-command-decode; sid:3487; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 993 (msg:"IMAP SSLv2 Client_Hello with pad request"; flow:to_server,established; flowbits:isnotset,sslv2.client_hello.request; flowbits:isnotset,sslv3.client_hello.request; flowbits:isnotset,tlsv1.client_hello.request; byte_test:1,<,128,0; content:"|01|"; depth:1; offset:3; content:"|00 02|"; depth:2; offset:6; flowbits:set,sslv2.client_hello.request; flowbits:noalert; classtype:protocol-command-decode; sid:3488; rev:1;)alert tcp $EXTERNAL_NET any -> $HOME_NET 993 (msg:"IMAP TLSv1 Client_Hello via SSLv2 handshake request"; flow:to_server,established; flowbits:isnotset,sslv2.client_hello.request; flowbits:isnotset,sslv3.client_hello.request; flowbits:isnotset,tlsv1.client_hello.request; byte_test:1,>,127,0; content:"|01|"; depth:1; offset:2; content:"|03 01|"; depth:2; offset:3; flowbits:set,tlsv1.client_hello.request; flowbits:noalert; classtype:protocol-command-decode; sid:3490; rev:1;)alert tcp $HOME_NET 993 -> $EXTERNAL_NET any (msg:"IMAP TLSv1 Server_Hello request"; flow:to_client,established; flowbits:isset,tlsv1.client_hello.request; content:"|16 03 01|"; depth:3; content:"|02|"; depth:1; offset:5; flowbits:set,tlsv1.server_hello.request; flowbits:noalert; classtype:protocol-command-decode; sid:3492; rev:2;)alert tcp $HOME_NET 993 -> $EXTERNAL_NET any (msg:"IMAP SSLv2 Server_Hello request"; flow:from_server,established; flowbits:isset,sslv2.client_hello.request; content:"|04|"; depth:1; offset:2; content:"|00 02|"; depth:2; offset:5; flowbits:set,sslv2.server_hello.request; flowbits:noalert; classtype:protocol-command-decode; sid:3491; rev:2;)