Vulnerability identifier: #VU18547

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-8370

CWE-ID: CWE-327

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
MELSEC-Q QJ71E71-B2
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC-Q QJ71E71-B5
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC-Q QJ71E71-100
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Mitsubishi Electric

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to usage of weak cryptographic algorithms. A remote attacker with ability to perform a man-on-the-middle attack can decrypt communication between client and PLC device.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MELSEC-Q QJ71E71-B2: All versions

MELSEC-Q QJ71E71-B5: All versions

MELSEC-Q QJ71E71-100: All versions

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External links
http://ics-cert.us-cert.gov/advisories/ICSA-16-336-03
http://www.mitsubishielectric.com/fa/document/technews/plc/fa-a-0230/faa0230.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 local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.