Vulnerability identifier: #VU7476

Vulnerability risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7928

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SEL-3622
Hardware solutions / Routers & switches, VoIP, GSM, etc
SEL-3620
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Schweitzer Engineering Laboratories, Inc.

Description
The vulnerability allows a remote attacker to bypass security restrictions.

The weakness exists due to improper enforcing of access control while configured for NAT port forwarding. A remote attacker can use unauthorized communications to downstream devices.

Mitigation
Install update from vendor's website.

Vulnerable software versions

SEL-3622: R202 - R204-V1

SEL-3620: R202 - R204-V1

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External links
http://ics-cert.us-cert.gov/advisories/ICSA-17-192-06

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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.