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Dell System Detect installs root certificate and private key (DSDTestProvider)

Vulnerability Note VU#925497

Original Release Date: 2015-11-24 | Last Revised: 2015-12-01

Overview

Dell System Detect installs the DSDTestProvider certificate into theTrusted Root Certificate Store on Microsoft Windows systems. The certificate includes the private key. This allows attackers to create trusted certificates and perform impersonation, man-in-the-middle (MiTM), and passive decryption attacks, resulting in the exposure of sensitive information.

Description

Dell System Detect (DSD) is an application that runs on your Windows-based PC or Tablet with your permission and interacts with the Dell Support website. DSD is pre-installed on some Dell systems. DSD installs a trusted root certificate (DSDTestProvider) that includes the private key.

Dell systems that have been re-imaged or do not otherwise have DSD installed are not affected.

Impact

An attacker can generate certificates signed by the DSDTestProvider CA. Systems that trusts the DSDTestProvider CA will trust any certificate issued by the CA. An attacker can impersonate web sites and other services, sign software and email messages, and decrypt network traffic and other data. Common attack scenarios include impersonating a web site, performing a MiTM attack to decrypt HTTPS traffic, and installing malicious software.

Solution

Mark DSDTestProvider certificate as untrusted

Mark Revoke the DSDTestProvider certificate. Using the Windows certificate manager (certmgr.msc), move the DSDTestProvider certificate from the Trusted Root Certificate Store to Untrusted Certificates. Revoking the certificate helps prevent reinstating trust if DSD is reinstalled.

Remove DSDTestProvider certificate

Dell has issued guidance to remove the DSDTestProvider certificate in this blog post.

Administrators can Configure Trusted Roots and Disallowed Certificates for managed systems.

Update Certified Trust List

Microsoft Security Advisory 3119884 documents updates to the Certified Trust List (CTL) to mark the DSDTestProvider certificate as untrusted. Most Windows systems will automatically receive the updated CTL.

Vendor Information

925497
Expand all

Dell

Updated:  November 25, 2015

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

http://www.dell.com/support/article/us/en/19/SLN300321

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base 9.4 AV:N/AC:L/Au:N/C:C/I:C/A:N
Temporal 8.5 E:H/RL:TF/RC:C
Environmental 6.4 CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

Credit

Reported in a blog post by Hanno Böck.

This document was written by Brian Gardiner.

Other Information

CVE IDs: None
Date Public: 2015-11-24
Date First Published: 2015-11-24
Date Last Updated: 2015-12-01 19:43 UTC
Document Revision: 34

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