#VU51393 Improper access control in JGS516PE and GS116Ev2 - CVE-2020-35220

Vulnerability identifier: #VU51393

Vulnerability risk: Medium

CVSSv4.0: 5.2 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-35220

CWE-ID: CWE-284

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
JGS516PE
Hardware solutions / Routers & switches, VoIP, GSM, etc
GS116Ev2
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: NETGEAR

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the TFTP server. A remote attacker on the local network can bypass implemented security restrictions and update the switch firmware.

Mitigation
Install update from vendor's website.

Vulnerable software versions

JGS516PE: 2.6.0.43

GS116Ev2: 2.6.0.43

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External links
https://research.nccgroup.com/2021/03/08/technical-advisory-multiple-vulnerabilities-in-netgear-prosafe-plus-jgs516pe-gs116ev2-switches/

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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.