Authentication bypass in Cisco Meeting Server

1) Authentication bypass

EUVDB-ID: #VU940

Risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-6445

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated user to bypass authentication and perform valid user's actions on the target system.
The weakness is due to improper processing of a deprecated authentication scheme by XMPP service that allows attackers to be admitted to the system as authenticated user.
Successful exploitation of the vulnerability results in malicious user's access to the vulnerable system.

Mitigation

Update Cisco Meeting Server to version 2.0.6 or later.
Update Acano Server to version 1.8.18 or 1.9.6.

Vulnerable software versions

Cisco Meeting Server: 1.8 - 2.0

CPE2.3

• cpe:2.3:a:cisco_systems:cisco_meeting_server:2.0:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_meeting_server:1.9:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_meeting_server:1.8:*:*:*:*:*:*:*

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161012-msc

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.