exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

Avira Free Security Suite 2019 Software Updater 2.0.6.13175 Improper Access Control

Avira Free Security Suite 2019 Software Updater 2.0.6.13175 Improper Access Control
Posted Aug 4, 2019
Authored by Silton Santos

Avira Free Security Suite 2019 Software Updater version 2.0.6.13175 suffers from an improper access control that allows for arbitrary file write that can allow an unprivileged user to obtain SYSTEM privileges.

tags | advisory, arbitrary
advisories | CVE-2019-11396
SHA-256 | 69fdf1c757c972b00a6ac38b381268805e095c1577ed18107e11edadd414cc65

Avira Free Security Suite 2019 Software Updater 2.0.6.13175 Improper Access Control

Change Mirror Download
=====[ Tempest Security Intelligence - ADV-01/2019 ]==========================

Avira Free Security Suite 2019 - Software Updater v2.0.6.13175
Author: Silton Santos
Tempest Security Intelligence - Recife, Pernambuco - Brazil

=====[ Table of Contents]=====================================================

* Overview
* Detailed description
* Timeline of disclosure
* Thanks & Acknowledgements
* References

=====[ Vulnerability Information]=============================================

* Class: Improper Access Control[CWE-284][1]
* CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
* CVE-2019-11396[2]

=====[ Overview]==============================================================

* System affected : Avira Free Security Suite 2019 - Software Updater[3].
* Software Version : 2.0.6.13175 (other versions may also be affected).
* Impact : An unprivileged user could obtain SYSTEM privileges.

=====[ Detailed description]==================================================

The permissive access rights on the SoftwareUpdater folder (files / folders)
are incompatible with the privileged file manipulation performed by the product.
Files can be created that can be used by an unprivileged user to obtain SYSTEM privileges.
Arbitrary file creation can be achieved by abusing the SwuConfig.json file creation.
An unprivileged user can replace these files by symbolic links to arbitrary files.
When an update occurs, a privileged service creates a file and sets its access rights,
offering write access to the Everyone group in any directory.

More Details: https://medium.com/sidechannel-br/vulnerabilidade-no-avira-security-suite-pode-levar-%C3%A0-escala%C3%A7%C3%A3o-de-privil%C3%A9gios-no-windows-71964236c077


=====[ Timeline of disclosure]===============================================

15/Apr/2019 - Responsible disclosure initiated with the vendor.
16/Apr/2019 - Vendor requested more details about the exploitation.
21/Apr/2019 - CVE assigned (reserved) CVE-2019-11396.
21/Apr/2019 - Email sent to the vendor requesting an update on the fix status.
23/Apr/2019 - The vendor has reproduced the vulnerability and works to correct it.
21/May/2019 - The vulnerability has been fixed and the vendor has informed that the release will be done in one week.
28/May/2019 - The vendor reported that the vulnerability had been fixed and that the update was public.
o4/Jun/2019 - Email sent to the vendor stating that the vulnerability has not been fixed.
18/Jun/2019 - Avira reported that the vulnerability has been fixed.
19/Jun/2019 - Email sent to the vendor stating that the vulnerability has not been fixed.
03/Jul/2019 - Avira replied that he had identified the real problem and was going to try to correct it again.
08/Jul/2019 - The vendor fixed the vulnerability.

=====[ Thanks & Acknowledgements]============================================

- Tempest Security Intelligence [4]

=====[ References ]===========================================================

[1] https://cwe.mitre.org/data/definitions/284.html

[2] https://cwe.mitre.org/data/definitions/284.html

[3] https://www.avira.com/pt-br/free-security-suite

[4] http://www.tempest.com.br

=====[ EOF ]====================================================================
Login or Register to add favorites

File Archive:

March 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Mar 1st
    16 Files
  • 2
    Mar 2nd
    0 Files
  • 3
    Mar 3rd
    0 Files
  • 4
    Mar 4th
    32 Files
  • 5
    Mar 5th
    28 Files
  • 6
    Mar 6th
    42 Files
  • 7
    Mar 7th
    17 Files
  • 8
    Mar 8th
    13 Files
  • 9
    Mar 9th
    0 Files
  • 10
    Mar 10th
    0 Files
  • 11
    Mar 11th
    15 Files
  • 12
    Mar 12th
    19 Files
  • 13
    Mar 13th
    21 Files
  • 14
    Mar 14th
    38 Files
  • 15
    Mar 15th
    15 Files
  • 16
    Mar 16th
    0 Files
  • 17
    Mar 17th
    0 Files
  • 18
    Mar 18th
    10 Files
  • 19
    Mar 19th
    32 Files
  • 20
    Mar 20th
    46 Files
  • 21
    Mar 21st
    16 Files
  • 22
    Mar 22nd
    13 Files
  • 23
    Mar 23rd
    0 Files
  • 24
    Mar 24th
    0 Files
  • 25
    Mar 25th
    12 Files
  • 26
    Mar 26th
    31 Files
  • 27
    Mar 27th
    19 Files
  • 28
    Mar 28th
    42 Files
  • 29
    Mar 29th
    0 Files
  • 30
    Mar 30th
    0 Files
  • 31
    Mar 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close