Denial of service in Cisco Meeting Server

1) Improper input validation

EUVDB-ID: #VU9383

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-12311

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to H.264 frame has an invalid picture parameter set (PPS) value. A remote attacker can send a specially crafted H.264 frame and cause the media process to  restart.

Mitigation

The vulnerability is fixed in the following versions: 2.3.TBD, 2.2.9.

Vulnerable software versions

Cisco Meeting Server: 2.0 - 2.3

CPE2.3

• cpe:2.3:a:cisco_systems:cisco_meeting_server:2.3:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_meeting_server:2.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_meeting_server:2.1:*:*:*:*:*:*:*

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-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.