Vulnerability identifier: #VU17424

Vulnerability risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1676

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Meeting Server
Client/Desktop applications / Multimedia software

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists in the Session Initiation Protocol (SIP) call processing of Cisco Meeting Server (CMS) due to insufficient validation of Session Description Protocol (SDP) messages. A remote attacker can send a specially crafted SDP message to the CMS call bridge and cause the CMS to reload, causing a DoS condition for all connected clients.

Mitigation
The vulnerability has been fixed in the versions 2.3.9, 2.2.14.

Vulnerable software versions

Cisco Meeting Server: 2.3.7

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190206-meeting-sipdos

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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.