#VU22187 Input validation error in Dameware Mini Remote Client agent and Dameware Remote Mini Control - CVE-2019-3980

Vulnerability identifier: #VU22187

Vulnerability risk: High

CVSSv4.0: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2019-3980

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Dameware Mini Remote Client agent
Client/Desktop applications / Software for system administration
Dameware Remote Mini Control
Server applications / SCADA systems

Vendor: SolarWinds

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to the affected software 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.

PoC:

 python dwrcs_dwDrvInst_rce.py -t  -e 

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Dameware Mini Remote Client agent: 12.1.0.89

Dameware Remote Mini Control: 12.1.0.89

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External links
https://github.com/tenable/poc/blob/master/Solarwinds/Dameware/dwrcs_dwDrvInst_rce.py
https://www.tenable.com/security/research/tra-2019-43

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.