/// <summary>
/// Checks if system directories are writable.
/// </summary>
/// <returns><c>true</c>, if one or more system directories are writable, <c>false</c> otherwise.</returns>
private static bool CheckForRwPaths()
{
var result = false;
var lines = RootCheckerUtils.ReaderFor("mount");
foreach (var line in lines)
{
// Split lines into parts
var args = line.Split(' ');
if (args.Length < 4)
{
// If we don't have enough options per line, skip this and log an error
Log.Error("CheckForRWPaths", $"Error formatting mount line: {line}");
continue;
}
var mountPoint = args[1];
var mountOptions = args[3];
foreach (var pathToCheck in RootCheckerConstants.PathsThatShouldNotBeWriteable)
{
if (mountPoint.Equals(pathToCheck, StringComparison.InvariantCultureIgnoreCase))
{
// Split options out and compare against "rw" to avoid false positives
if (mountOptions.Split(',').Any(option => option.Equals("rw", StringComparison.InvariantCultureIgnoreCase)))
{
Log.Info("CheckForRWPaths", $"{pathToCheck} path is mounted with rw permissions! {line}");
result = true;
}
}
}
}
return(result);
}
/// <summary>
/// Checks for busy box binary.
/// </summary>
/// <returns><c>true</c>, if for busy box binary was checked, <c>false</c> otherwise.</returns>
private static bool CheckForBusyBoxBinary() => RootCheckerUtils.CheckForBinary("busybox");
/// <summary>
/// Checks for several dangerous properties (ro.debuggable == 1 or ro.secure==0)
/// </summary>
/// <returns><c>true</c>, if dangerous properties are found, <c>false</c> otherwise.</returns>
private static bool CheckForDangerousProps()
{
var activeProps = RootCheckerUtils.ReaderFor("getprop");
return(activeProps.Contains("[ro.secure]: [0]") || activeProps.Contains("[ro.debuggable]: [1]"));
}
/// <summary>
/// Checks for su binary.
/// </summary>
/// <returns><c>true</c>, if for su binary was checked, <c>false</c> otherwise.</returns>
private static bool CheckForSuBinary() => RootCheckerUtils.CheckForBinary("su");
