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AUSCERT External Security Bulletin Redistribution
Cisco Video Communication Server Session Initiation Protocol
Packet Processing Denial of Service Vulnerability
17 May 2016
AusCERT Security Bulletin Summary
Product: Cisco Video Communications Server (VCS)
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2016-1400
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Cisco Security Advisory
Cisco Video Communication Server Session Initiation Protocol Packet
Processing Denial of Service Vulnerability
2016 May 16 00:00 GMT
Base - 5.0
No workarounds available
Cisco Bug IDs:
A vulnerability in the Session Initiation Protocol (SIP) implementation
of the Cisco Video Communications Server (VCS) could allow an
unauthenticated, remote attacker to cause a denial of service (DoS)
The vulnerability is due to a malformed SIP header message. An attacker
could exploit this vulnerability by manipulating the SIP URI. An
exploit could allow the attacker to cause a disruption of service to
Cisco has released software updates that address this
vulnerability. Workarounds that address this vulnerability are not
This advisory is available at the following link:
Cisco TelePresence VCS X8.x releases prior to X8.7.2 are vulnerable.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
There are no workarounds that address this vulnerability.
When considering software upgrades, customers are advised to
consult the Cisco Security Advisories and Responses archive at
http://www.cisco.com/go/psirt and review subsequent advisories to
determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded
contain sufficient memory and confirm that current hardware and
software configurations will continue to be supported properly by the
new release. If the information is not clear, customers are advised to
contact the Cisco Technical Assistance Center (TAC) or their contracted
Exploitation and Public Announcements
The Cisco Product Security Incident Response Team (PSIRT) is not aware
of any public announcements or malicious use of the vulnerability that
is described in this advisory.
Version Description Section Status Date
1.0 Initial public release. - Final 2016-May-16
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE
DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO
RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits
the distribution URL is an uncontrolled copy and may lack important
information or contain factual errors. The information in this document
is intended for end users of Cisco products.
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