#VU17382 Missing authentication for critical function in InTouch Edge HMI and AVEVA Edge - CVE-2019-6543

Vulnerability identifier: #VU17382

Vulnerability risk: High

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2019-6543

CWE-ID: CWE-306

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
InTouch Edge HMI
Server applications / SCADA systems
AVEVA Edge
Server applications / SCADA systems

Vendor: AVEVA Software, LLC.

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists in the TCP/IP Server Task due to missing authentication for critical function. A remote unauthenticated attacker can execute arbitrary code under the program runtime privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

InTouch Edge HMI: before 2017 Update 3

AVEVA Edge: before 81.3.0

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External links
https://sw.aveva.com/hubfs/assets-2018/pdf/security-bulletin/SecurityBulletin_LFSec133.pdf

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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. However, proof of concept for this vulnerability is available.