Article Number: 000188311


DSA-2021-124: Dell EMC NetWorker Security Update for Multiple Vulnerabilities

Summary: Mitigations are available for multiple vulnerabilities affecting Dell EMC NetWorker that may be exploited by malicious users to gain access to unauthorized information.

Article Content


Impact

Medium

Details

 
Propriety Code CVEs  Description CVSS Base Score CVSS Vector String
CVE-2021-21569 Dell NetWorker, versions 18.x and 19.x contain a Path traversal vulnerability. A NetWorker server user with remote access to NetWorker clients may potentially exploit this vulnerability and gain access to unauthorized information.  6.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
CVE-2021-21570
 
Dell NetWorker, versions 18.x and 19.x contain an Information disclosure vulnerability. A NetWorker server user with remote access to NetWorker clients may potentially exploit this vulnerability and gain access to unauthorized information. 6.8 CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H


 
Propriety Code CVEs  Description CVSS Base Score CVSS Vector String
CVE-2021-21569 Dell NetWorker, versions 18.x and 19.x contain a Path traversal vulnerability. A NetWorker server user with remote access to NetWorker clients may potentially exploit this vulnerability and gain access to unauthorized information.  6.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
CVE-2021-21570
 
Dell NetWorker, versions 18.x and 19.x contain an Information disclosure vulnerability. A NetWorker server user with remote access to NetWorker clients may potentially exploit this vulnerability and gain access to unauthorized information. 6.8 CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H


Dell Technologies recommends all customers consider both the CVSS base score and any relevant temporal and environmental scores that may impact the potential severity associated with a particular security vulnerability.

Affected Products and Remediation

CVEs Addressed Product Affected Versions Updated Version Link to Update
CVE-2021-21569 Dell EMC NetWorker Dell EMC NetWorker 18.x, 19.1.x, 19.2.x, 19.3.x, and 19.4.x versions prior to 19.4.0.4 19.4.0.4

If an updated version cannot be applied, follow the workaround that is detailed in the Workarounds and Mitigations section of this DSA.
https://www.dell.com/support/home/en-in/product-support/product/networker/drivers
CVE-2021-21570
CVEs Addressed Product Affected Versions Updated Version Link to Update
CVE-2021-21569 Dell EMC NetWorker Dell EMC NetWorker 18.x, 19.1.x, 19.2.x, 19.3.x, and 19.4.x versions prior to 19.4.0.4 19.4.0.4

If an updated version cannot be applied, follow the workaround that is detailed in the Workarounds and Mitigations section of this DSA.
https://www.dell.com/support/home/en-in/product-support/product/networker/drivers
CVE-2021-21570

Workarounds and Mitigations

These vulnerabilities can be partially mitigated by configuring the Dell EMC NetWorker server to use nsrauth authentication, and configuring the NetWorker nonempty servers file. Follow the recommendations in the security configuration guide for your product version. These actions limit the scope of exploitation to authorized NetWorker users already defined with “Operator” level or higher privileges.

Mitigation procedure:
Step 1:
Configure the Dell EMC NetWorker server to use nsrauth:
See Security Configuration Guide Chapter 2.
Access Control Settings:
Component access control > Component authentication > Modifying the authentication methods used by NetWorker hosts

Step 2:
Configure the NetWorker nonempty servers file:
See Security Configuration Guide Chapter 2.
Access Control Settings:
Component access control > Component authorization > Restricting remote program executions and client-tasking rights

Note: If you are unsure of your NetWorker server's hostname or IP address, it is recommended to update the servers file with local hostname or IP address.

Security Configuration Guide Links:   

Acknowledgements

Dell would like to thank Quentin Kaiser for reporting these vulnerabilities.

Revision History

RevisionDateDescription
1.02021-06-12Initial Release
1.12021-09-02Updated 'Affected Products and Remediation' Section

Related Information

Dell Security Advisories and Notices
Dell Vulnerability Response Policy
CVSS Scoring Guide


The information in this Dell Technologies Security Advisory should be read and used to assist in avoiding situations that may arise from the problems described herein. Dell Technologies distributes Security Advisories to bring important security information to the attention of users of the affected product(s). Dell Technologies assesses the risk based on an average of risks across a diverse set of installed systems and may not represent the actual risk to your local installation and individual environment. It is recommended that all users determine the applicability of this information to their individual environments and take appropriate actions. The information set forth herein is provided "as is" without warranty of any kind. Dell Technologies expressly 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 Technologies, its affiliates or suppliers, be liable for any damages whatsoever arising from or related to the information contained herein or actions that you decide to take based thereon, including any direct, indirect, incidental, consequential, loss of business profits or special damages, even if Dell Technologies, its affiliates or 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 shall apply to the extent permissible under law.

Article Properties


Affected Product

NetWorker Family, NetWorker, NetWorker Series, Product Security Information

Last Published Date

02 Sep 2021

Version

3

Article Type

Dell Security Advisory

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