Abstract: Malware on android platform can bypass the conventional android security mechanisms through the privilege escalation process．Due to the android fragmentation phenomenon,the emergence of root vulnerabilities in utilization patterns and scopes strongly urges the researchers’ exhaustive understanding of these mechanisms to implement corresponding security policy．The categorization of android root vulnerabilities was proposed based on their utilization patterns of whether they can be directly utilized on the mobile terminal．And then a detailed description of the existing vulnerabilities in the implementation particulars,exploit patterns,as well as coverage was presented to help to further develop the vulnerability detection program.

Key words: Android root,Privilege escalation process,Vulnerability analysis