GPL NETBIOS SMB Session Setup NTMLSSP andx asn1 overflow attempt

alert tcp $EXTERNAL_NET any -> $HOME_NET 139 (
    msg:"GPL NETBIOS SMB Session Setup NTMLSSP andx asn1 overflow attempt";
    flow:established,to_server;
    content:"|00|"; depth:1;
    content:"|FF|SMB"; within:4; distance:3;
    pcre:"/^(\x75|\x2d|\x2f|\xa2|\x2e|\x24|\x74)/sR";
    byte_test:1,!&,128,6,relative;
    content:"s"; depth:1; offset:39;
    byte_jump:2,0,little,relative;
    byte_test:4,&,2147483648,21,relative,little;
    content:!"NTLMSSP"; within:7; distance:27;
    asn1:double_overflow, bitstring_overflow, relative_offset 27, oversize_length 2048;
    reference:bugtraq,9633;
    reference:bugtraq,9635;
    reference:cve,2003-0818;
    reference:nessus,12052;
    reference:nessus,12065;
    reference:url,www.microsoft.com/technet/security/bulletin/MS04-007.mspx;
    classtype:protocol-command-decode;
    sid:2103001; rev:5;
    metadata:created_at 2010_09_23, cve CVE_2003_0818, confidence Medium, signature_severity Informational, updated_at 2019_07_26;
)