Details: HTC recovery log on some devices is world writable and so can be deleted and symlinked to /data/local.prop to allow root on reboot, this is a appears to be a unstable exploit and requires the user to reboot into recovery mode [gh-cunninglogic-tacoroot][archived]
Details: On ASUS Transformer Pime /data/sensors/AMI304_Config.ini is set world writable on boot and so a /data/local.prop symlink attack can be mounted [gh-cunninglogic-nachoroot-sh][archived]