MitM attacks against Skype for Business users on AudioCodes IP Phones



Published: 2018-10-25 | Updated: 2018-11-25
Risk Low
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2018-18567
CWE-ID CWE-300
Exploitation vector Local network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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450HD IP Phone
Mobile applications / Mobile firmware & hardware

440HD IP Phone
Mobile applications / Mobile firmware & hardware

Vendor AudioCodes

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Man-in-the-Middle (MitM) attack

EUVDB-ID: #VU15554

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 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

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

External links

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


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.



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