Denial of service in Cisco TelePresence Video Communication Server

1) Denial of service

EUVDB-ID: #VU7982

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-6790

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 n the Session Initiation Protocol (SIP) on the Cisco TelePresence Video Communication Server (VCS) due to excessive SIP traffic sent to the device. A remote attacker can transmit large volumes of SIP traffic to the VCS and cause the system to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco TelePresence Video Communication Server: All versions

CPE2.3

• cpe:2.3:a:cisco_systems:cisco_telepresence_video_communication_server:*:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-vcs

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.