Vulnerability identifier: #VU15554

Vulnerability risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:P/RL:U/RC:C]

CVE-ID: CVE-2018-18567

CWE-ID: CWE-300

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
450HD IP Phone
Mobile applications / Mobile firmware & hardware
440HD IP Phone
Mobile applications / Mobile firmware & hardware

Vendor: AudioCodes

Description
The vulnerability allows a remote attacker to perform MitM attacks.

The vulnerability exists due to the application does not perform proper validation of the X.509 certificates when used with an on-premise installation with Skype for Business. A remote attacker can obtain sensitive credential information.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

450HD IP Phone: 3.1.1.43.1 - 3.1.2.89

440HD IP Phone: 3.1.1.43.1 - 3.1.2.89

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External links
http://seclists.org/bugtraq/2018/Oct/32
http://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2018-026.txt

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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. However, proof of concept for this vulnerability is available.