#VU63355 Improper access control in Serv-U FTP Server - CVE-2021-35249

Vulnerability identifier: #VU63355

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-35249

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Serv-U FTP Server
Server applications / File servers (FTP/HTTP)

Vendor: SolarWinds

Description

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote authenticated user with domain admin permissions can access configuration and user information of other domains that they should not have access to.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Serv-U FTP Server: 15.1 - 15.3

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External links
https://www.solarwinds.com/trust-center/security-advisories/CVE-2021-35249
https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3-1_release_notes.htm

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.