18 January 2018
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.0185 Cisco Unified Customer Voice Portal Denial of Service Vulnerability 18 January 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Unified Customer Voice Portal Publisher: Cisco Systems Operating System: Cisco Windows Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-0086 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-cvp - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Security Advisory Cisco Unified Customer Voice Portal Denial of Service Vulnerability High Advisory ID: cisco-sa-20180117-cvp First Published: 2018 January 17 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCve85840 CVSS Score: Base 8.6 Base 8.6 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X CVE-2018-0086 CWE-400 Summary A vulnerability in the application server of the Cisco Unified Customer Voice Portal (CVP) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability is due to malformed SIP INVITE traffic received on the CVP during communications with the Cisco Virtualized Voice Browser (VVB). An attacker could exploit this vulnerability by sending malformed SIP INVITE traffic to the targeted appliance. An exploit could allow the attacker to impact the availability of services and data on the device, causing a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-cvp Affected Products Vulnerable Products This vulnerability affects Cisco Unified CVP running any software release prior to 11.6(1). To determine which release of Cisco Unified CVP software is running, administrators can use a web browser to connect to the Cisco Unified CVP client via HTTPS. The release number appears on the software home page. The following is an example of the text that may appear on the home page: Cisco Unified Customer Voice Portal Version 11.5(1) Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Workarounds There are no workarounds that address this vulnerability; however, there are ways to mitigate this vulnerability. 1) Ensure the Cisco UCCE (Unified Contact Center Enterprise) infrastructure is configured to only allow incoming SIP traffic from trusted IP addresses. 2) Ensure third-party gateway(s) residing between the CVP & ISP are enabled for content filtering to drop packets containing malformed SIP headers or malicious inputs. Fixed Software Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to upgrade 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 maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Fixed Releases This vulnerability is fixed in Cisco Unified CVP software release 11.6(1) or later. The software can be downloaded from the Software Center on Cisco.com by navigating to Downloads Home > Products > Customer Collaboration > Options for Contact Center Solutions > Unified Customer Voice Portal. 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. Source This vulnerability was found during the resolution of a Cisco TAC support case. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-cvp Revision History Version Description Section Status Date 1.0 Initial public release. Final 2018-January-17 LEGAL DISCLAIMER 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. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWl/rjYx+lLeg9Ub1AQidzQ//Q0KBO7lrjuliJjl3HA//2qL4+mX+mJS/ 9xL+WlbNLIieXXAkdl7tIX02CZ5fsWCuufNwl2nxXIYubenkW1e6j5flJrMKilpd 5sK0PnyWvMFGtwxQjbhN5eeG9fyOIGQyv5VTbWMwmvNAkEDlpS4aGH5NnRBWfMQp 7oCdFRmZ6xDrpWfB4Ak5EZBIyPKp6Px9L9b70I9ChXutORFSk7v1cLd0ld7QYiQ/ MbM1NIBjrOrz5rUfFIB8pyFsIqMrp7+UtvU0jeb6dBLx+MeE9mSASSHAk1H46GjL rFcQchJBDARw64GsnPPLrMuJjq5VWnCjp6prkHeEeKvgEkBNn8taS5pYDTVoGYoD pX3QMDuvhOcfdin1wKq5W/Ss8RF2EhvPdh3soLw2vzytvSV8iwUExcSrnMkdei5d k8xFjtVGP6zwyMCAUZJ9MX5sj5a2A8aySHghsbP8zgAE6glbnChB4qWuaQSzlAu8 jlqctHteAIThrCybydG0dMDL+hhJjmPAESNOK50P6Xhn2S94+hOAehCPJLFHDlG0 OQv+8LXEz4rRtB75VaS4BEAfHm44ManWyj/WjpJVnzYcH34e8m+tJO3zDPTPiyaT ESj86Da4K4fDxb5JkTxMYQwcuvcovnYOc1s3bjikUbJfrp1gOoW7IE3VV3w/Y/EP GpeTVDICZxw= =uIme -----END PGP SIGNATURE-----