Insecure DLL library loading in Advantech WebAccess

1) Insecure DLL library loading

EUVDB-ID: #VU5824

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-5175

CWE-ID: CWE-427 - Uncontrolled Search Path Element

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insecure inclusion of dynamic libraries (.dll), used by Advantech WebAccess. A remote attacker can place a specially crafted .dll file on a public SMB or WebDav share, trick the victim into opening file with  Advantech WebAccess and execute arbitrary code on the target system with privileges of the current user.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update to version 8.2.

Vulnerable software versions

Advantech WebAccess: 8.1_20151230 - 8.1_20160519

External links

http://ics-cert.us-cert.gov/advisories/ICSA-17-045-01

Q & A

Can this vulnerability be exploited remotely?

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