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Rapid Scada 5.5.0 Insecure Permissions

Rapid Scada 5.5.0 Insecure Permissions
Posted Mar 6, 2018
Authored by Felipe Xavier Oliveira

Rapid Scada version 5.5.0 suffers from an insecure permission vulnerability.

tags | exploit
advisories | CVE-2018-5313
MD5 | c81b2a59f24e59822c91601bace1421d

Rapid Scada 5.5.0 Insecure Permissions

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=====[ Tempest Security Intelligence - ADV-21/2018 ]===

Rapid Scada - 5.5.0 - Insecure Permissions
-------------------------------------------------------
Author:
- Filipe Xavier Oliveira: < filipe.xavier () tempest.com.br

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

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

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

* System affected : Rapid Scada [1]
* Software Version : 5.5.0. Other versions or models may also be affected.
* Impact : A malware could overwrite originals files to do persistence or elevate privileges, because the installation folder gives full access to any user on the system.

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

A vulnerability allows local attackers to escalate privilege on Rapid Scada 5.5.0 because of weak C:\SCADA permissions. The specific flaw exists within the access control that is set and modified during the installation of the product. The product sets weak access control restrictions. An attacker can leverage this vulnerability to execute arbitrary code under the context of Administrator, the IUSR account, or SYSTEM.

C:\>icacls SCADA
SCADA BUILTIN\Administrators:(I)(F)
BUILTIN\Administrators:(I)(OI)(CI)(IO)(F)
NT AUTHORITY\SYSTEM:(I)(F)
NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F)
BUILTIN\Users:(I)(OI)(CI)(RX)
NT AUTHORITY\Authenticated Users:(I)(M)
NT AUTHORITY\Authenticated Users:(I)(OI)(CI)(IO)(M)

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

01/09/2018 - Vendor was informed of the vulnerability.
01/15/2018 - Vendor told us that will not focus on this vulnerability for now.
02/09/2018 - CVE assigned [2]
03/05/2018 - Advisory publication date.

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

- Tempest Security Intelligence / Tempest's Pentest Team [3]

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

[1] - http://rapidscada.org/
[2] - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5313
[3] http://www.tempest.com.br/
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