Privilege escalation in SolarWinds Serv-U

1) Privilege escalation

EUVDB-ID: #VU17401

Risk: High

CVSSv3.1: 8.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-15906

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to escalate privileges on the system.

The vulnerability exists due to improper privileges and access controls. A remote attacker who is a member of the "Domain Administrators" can leverage the CSV user import function and execute arbitrary code under the context of the Windows SYSTEM account in a default installation.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

The vulnerability has been addressed in the version 15.1.6 Hotfix 2.

Vulnerable software versions

Serv-U FTP Server: 15.1.6

External links

http://seclists.org/fulldisclosure/2019/Feb/4

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

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.