The CMTS MIC is a security measure which simply ensures that you do not edit your config file.
If you edit your config file, the CMTS MIC will change, and the CMTS will reject your edited config file that you are forcing.
If you are able to serve forced config files, this is the security measure that prevents you from editing them.
If you want to edit your config file, you may be able to crack your CMTS MIC hash which is a salted MD5. DOCSIS white papers go into further detail regarding the specific encryption. Depending on how many characters was used, it may take from a week to several months to crack. There is a "cmtsmiccracker" tool that rajiko wrote a while back.
If you edit your config file, the CMTS MIC will change, and the CMTS will reject your edited config file that you are forcing.
If you are able to serve forced config files, this is the security measure that prevents you from editing them.
If you want to edit your config file, you may be able to crack your CMTS MIC hash which is a salted MD5. DOCSIS white papers go into further detail regarding the specific encryption. Depending on how many characters was used, it may take from a week to several months to crack. There is a "cmtsmiccracker" tool that rajiko wrote a while back.