#VU26710 Path traversal in WebAccess/NMS - CVE-2020-10631

Vulnerability identifier: #VU26710

Vulnerability risk: High

CVSSv4.0: 6.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-10631

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WebAccess/NMS
Server applications / Remote management servers, RDP, SSH

Vendor: Advantech Co., Ltd

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted URL and delete or read files outside the application’s control.

Mitigation
Install update from vendor's website.

Vulnerable software versions

WebAccess/NMS: before 3.0.2

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External links
https://ics-cert.us-cert.gov/advisories/icsa-20-098-01

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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.