Vulnerability identifier: #VU49228

Vulnerability risk: Low

CVSSv3.1: 6.6 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5686

CWE-ID: CWE-303

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
UNIVERGE SV9500
Server applications / Conferencing, Collaboration and VoIP solutions
UNIVERGE SV8500
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: NEC Corporation

Description

The vulnerability allows a remote attacker to to bypass authentication process.

The vulnerability exists due to incorrect implementation of authentication algorithm. A remote attacker on the local network can send a specially crafted request, access the remote system maintenance feature and disclose sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

UNIVERGE SV9500: V1 - V7

UNIVERGE SV8500: S6 - S8

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External links
http://jvn.jp/en/jp/JVN38784555/index.html
http://www.necplatforms.co.jp/press/files/SV85Vulnerability_UNIVERGE_Product_E_20210104.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.