DSA-2019-001: Dell Networking OS10 Improper Certificate Validation Vulnerability

DSA-2019-001: Dell Networking OS10 Improper Certificate Validation Vulnerability

CVE Identifier: CVE-2018-15784

Dell Identifier: DSA-2019-001

Severity: High

Severity Rating: CVSS Base Score: 7.4 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)

Affected products:

Dell Networking OS10 versions prior to


Dell Networking OS10 has been updated to address a vulnerability which may be potentially exploited to compromise the system.


Dell Networking OS10 versions prior to contain a vulnerability in the Phone Home feature which does not properly validate the server’s certificate authority during TLS handshake. Use of an invalid or malicious certificate could potentially allow an attacker to spoof a trusted entity by using a man-in-the-middle (MITM) attack.


The following Dell OS10 versions have been patched to resolve this vulnerability:

  • Dell OS10 versions 10.3.2-R2,
  • Dell OS10 versions 10.4.0-R3S,
  • Dell OS10 versions,
  • Dell OS10 versions and later.

Dell recommends all customers upgrade or apply available patches at the earliest opportunity.

If an upgrade cannot be done immediately, Dell recommends to disable the SupportAssist feature on Dell Networking OS10 versions prior to

Link to remedies:

Customers can download software from https://www.dell.com/support/software/.

Customers can disable the phone home feature by disabling SupportAssist. Command reference: Page 945 of OS10 Enterprise Edition User Guide Release https://topics-cdn.dell.com/pdf/force10-s3048-on_Connectivity-Guide4_en-us.pdf


Dell would like to thank Thorsten Tüllmann from the Karlsruhe Institute of Technology for reporting this vulnerability.

Dell recommends that all users determine the applicability of this information to their individual situations and take appropriate action. The information set forth herein is provided "as is" without warranty of any kind. Dell disclaims all warranties, either express or implied, including the warranties of merchantability, fitness for a particular purpose, title and non-infringement. In no event, shall Dell or its suppliers, be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Dell or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages, so the foregoing limitation may not apply.

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Article ID: SLN315899

Last Date Modified: 09/14/2019 12:17 PM

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