Remote denial of service in Cisco Meeting Server

1) Improper input validation

EUVDB-ID: #VU5854

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-3830

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to cause denial of service.

The vulnerability exists due to improper input validation when processing requests sent to port 2829/TCP in internal API of the Cisco Meeting Server (CMS). A remote unauthenticated attacker can send a specially crafted request to port 2829/TCP and cause denial of service.

Successful exploitation of the vulnerability may allow an attacker to perform denial of service (DoS) attack against vulnerable service.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco Meeting Server: 2.0 - 2.1.3

CPE2.3

• cpe:2.3:a:cisco_systems:cisco_meeting_server:2.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_meeting_server:2.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_meeting_server:2.0.11:*:*:*:*:*:*:*

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170215-cms

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.