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Unix Domain Socket: A Hidden Door Leading to Privilege Escalation in the Android Ecosystem
Unix Domain Sockets: A Hidden Door to Privilege Escalation in the Android Ecosystem, exploring unique vulnerabilities and attack paths, including packaging mistakes, misconfiguration and lack of input validation, to improve security and detection.
- Unique Domain Sockets (UDS) are a hidden door to privilege escalation in the Android ecosystem.
- UDS are created in native code and are a standard component of the POSIX operating system.
- UDS can be used to bypass access control restrictions, making them a valuable attack target.
- There are two common mistakes that result in dangerous interfaces being exported: packaging configuration mistakes and misconfiguration vulnerabilities.
- UDS services often ignore their security because untrusted apps cannot directly access them.
- Access restrictions cannot solve all security problems, and it is highly recommended to improve the security of the service implementation itself.
- Automated RSS methods can help improve the efficiency of UDS vulnerability mining.
- Code QL and static chain analysis are effective tools for code analysis.
- UDS services often have access control, but this cannot determine how the upstream process uses the UDS service.
- There are three attack paths: directly using the UDS, sending payload to the hardware vendor service, and then forwarding to the UDS service, or using a broadcast receiver to receive log measurement commands.
- UDS services are often ignored in the communication flowchart, making them a hidden door to privilege escalation.
- Access restrictions can only determine who can access the UDS service, but cannot determine how the upstream process uses this UDS service.
- There are many ways to do access control for UDS, including SE_INUX policies and macros.
- UDS services often have logical vulnerabilities, which are often caused by the lack of input validation.
- UDS services often have integer overflow vulnerabilities, which can be exploited to achieve command injection.
- Automated analysis methods can help improve the efficiency of UDS vulnerability mining.
- There are many tools available for UDS vulnerability mining, including code QL, static chain analysis, and SEsearch.
- UDS services often have memory corruption vulnerabilities, which can be exploited to achieve privilege escalation.
- There are many ways to bypass access control restrictions, including using a broadcast receiver to receive log measurement commands.
- UDS services often have code injection vulnerabilities, which can be exploited to achieve privilege escalation.
- Automated analysis methods can help improve the efficiency of UDS vulnerability mining.
- There are many tools available for UDS vulnerability mining, including code QL, static chain analysis, and SEsearch.