Remote code execution in Solarwinds Dameware Mini Remote Client agent

1) Input validation error

EUVDB-ID: #VU22187

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 - Improper input validation

Exploit availability: Yes

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

CPE2.3

• cpe:2.3:a:solarwinds:dameware_mini_remote_client_agent:12.1.0.89:*:*:*:*:dameware_remote_mini_control:*:*
• cpe:2.3:a:solarwinds:dameware_remote_mini_control:12.1.0.89:*:*:*:*:*:*:*

External links

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

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.