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SolarWinds Dameware Mini Remote Control Unauthenticated RCE

Critical
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Synopsis

Tenable found an unauthenticated remote code execution vulnerability in the SolarWinds Dameware Remote Mini Remote Client Agent Service (DWRCS.exe) version 12.1.0.89.

CVE-2019-3980: Unauthenticated RCE

The Solarwinds Dameware Mini Remote Client agent supports smart card authentication by default which allows a user to upload an executable to be executed on the DWRCS.exe host. The executable will be saved in C:\Windows\Temp\ as dwDrvInst.exe and executed with the privileges of the Local System account. An unauthenticated, remote attacker can request smart card login and upload and execute an arbitrary executable run under the Local System account. *

Proof of Concept

This vulnerability can be demonstrated by executing the PoC (link provided in advisory) as such:

 python dwrcs_dwDrvInst_rce.py -t <target_host> -e <binary_to_execute>

Solution

According to SolarWinds, the vulnerability has been fully remediated in the latest release of Dameware 12.1.2.

Additional References

https://github.com/tenable/poc/blob/master/Solarwinds/Dameware/dwrcs_dwDrvInst_rce.py

Disclosure Timeline

07/10/2019 - Tenable discloses vulnerability to [email protected]
07/11/2019 - Solarwinds received disclosure and initiated investigation
07/26/2019 - Tenable follows up on issues and asks expected version for fix.
07/26/2019 - Solarwinds confirms vulnerability and that engineers are working on a fix.
08/12/2019 - Tenable follows up and asks for an update
08/13/2019 - Solarwinds mentions they are still working on a fix
9/3/2019 - Tenable follows up and asks for an update
9/10/2019 - Solarwinds identifies fix for issue, expected release date pending
9/23/2019 - Tenable follows up and asks for update. Also asks for download link for patch when fix is released.
10/7/2019 - Solarwinds notifies Tenable that engineering teams continue to work on a release date.
11/12/2020 - Tenable notifies SolarWinds of incomplete patch. Per policy, we will update our advisory on Nov 20, 2020.
02/17/2021 - SolarWinds notifies us that a patch was released which fixes this. Asks us to update the advisory.

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Risk Information

CVE ID: CVE-2019-3980
Tenable Advisory ID: TRA-2019-43
Credit:
Tenable Research
CVSSv2 Base / Temporal Score:
10.0
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:C/I:C/A:C
Affected Products:
Solarwinds Dameware Mini Remote Client Agent Service versions prior to 12.1.0 Hotfix 3
Risk Factor:
Critical

Advisory Timeline

10/8/2019 - Advisory Released
10/30/2019 - Updated Solution
11/20/2020 - Solution and disclosure timeline updated
02/17/2020 - Solution and disclosure timeline updated
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