Security restrictions bypass in Cisco Expressway

Published: 2016-12-07

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2016-9207
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Cisco TelePresence Video Communication Server Server applications / Other server solutions Cisco Expressway Server applications / Conferencing, Collaboration and VoIP solutions
Vendor	Cisco Systems, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Security restrictions bypass

EUVDB-ID: #VU12996

Risk: Medium

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-9207

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to improper input validation when processing incoming requests within HTTP traffic server. A remote attacker can use a specially crafted URL in HTTP request to initiate TCP connections to hosts located in local network.

Mitigation

Update to version X8.9.

Vulnerable software versions

Cisco TelePresence Video Communication Server: All versions

Cisco Expressway: X8.1 - X8.8.3

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-expressway
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvc10834

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.