Vulnerability identifier: #VU48563

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3482

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Expressway
Server applications / Conferencing, Collaboration and VoIP solutions
Cisco TelePresence Video Communication Server
Server applications / Other server solutions

Vendor: Cisco Systems, Inc

Description

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

The vulnerability exists due to improper validation of specific connection information by the Traversal Using Relays around NAT (TURN) server. A remote attacker can send traffic through the affected software to destinations beyond the application and gain unauthorized network access.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Expressway: All versions

Cisco TelePresence Video Communication Server: All versions

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-Expressway-8J3yZ7hV

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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.