Vulnerability identifier: #VU11894

Vulnerability risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8840

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

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 due to stack-based buffer overflow. A remote unauthenticated attacker can send a carefully crafted packet during a tag, alarm, or event related action such as read and write, trigger memory corruption and execute arbitrary code with elevated privileges.

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

Mitigation
Update to version 8.1 SP1.

Vulnerable software versions

InTouch Edge HMI: 8.0 - 8.1

AVEVA Edge: 8.0 - 8.1

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External links
http://software.schneider-electric.com/pdf/security-bulletin/lfsec00000125/%20

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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.