Improper input validation in Advantech WebAccess

1) Improper input validation

EUVDB-ID: #VU16607

Risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-18999

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists due to improper validation of user-supplied input. A remote attacker can send specially crafted input, trigger stack-based buffer overflow and perform unspecified actions on the system.

Mitigation

Update to version 8.3.4.

Vulnerable software versions

Advantech WebAccess: 8.3.2

External links

http://ics-cert.us-cert.gov/advisories/ICSA-18-352-02

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.