CVE-2016-4989

Setroubleshoot permite a los usuarios locales evitar un mecanismo de protección de contenedor previsto y ejecutar comandos arbitrarios al activar una denegación de SELinux con un nombre de archivo manipulado, que es manejado por la función _set_tpath en audit_data.py oa través de un (2) local_id o ( 3) campo analysis_id en un documento XML manipulado a la función run_fix en SetroubleshootFixit.py, relacionado con las funciones subprocess.check_output y commands.getstatusoutput, una vulnerabilidad diferente de CVE-2016-4445.

Shell command injection flaws were found in the way the setroubleshoot executed external commands. A local attacker able to trigger certain SELinux denials could use these flaws to execute arbitrary code with root privileges.

The setroubleshoot packages provide tools to help diagnose SELinux problems. When Access Vector Cache messages are returned, an alert can be generated that provides information about the problem and helps to track its resolution. The setroubleshoot-plugins package provides a set of analysis plugins for use with setroubleshoot. Each plugin has the capacity to analyze SELinux AVC data and system data to provide user friendly reports describing how to interpret SELinux AVC denials.