Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.2449.2 Cisco Unified Communications Manager Session Initiation Protocol Denial of Service Vulnerability 9 July 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Unified Communications Manager Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-1887 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-cucm-dos Revision History: July 9 2019: Update 1.1 from Cisco July 4 2019: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Unified Communications Manager Session Initiation Protocol Denial of Service Vulnerability Priority: High Advisory ID: cisco-sa-20190703-cucm-dos First Published: 2019 July 3 16:00 GMT Last Updated: 2019 July 8 22:30 GMT Version 1.1: Final Workarounds: No workarounds availableCisco Bug IDs: CSCvo70834 CVE-2019-1887 CWE-787 CVSS Score: 8.6 AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X Summary o A vulnerability in the Session Initiation Protocol (SIP) protocol implementation of Cisco Unified Communications Manager and Unified Communications Manager Session Management Edition could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to insufficient validation of input SIP traffic. An attacker could exploit this vulnerability by sending a malformed SIP packet to an affected Cisco Unified Communications Manager or Unified Communications Manager Session Management Edition. A successful exploit could allow the attacker to trigger a new registration process on all connected phones, temporarily disrupting service. 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-20190703-cucm-dos Affected Products o Vulnerable Products This vulnerability affects Cisco Unified Communications Manager and Unified Communications Manager Session Management Edition. For information about which Cisco Unified Communications Manager and Unified Communications Manager Session Management Edition releases are vulnerable, see the Fixed Software section of this advisory. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following Cisco products: Emergency Responder Finesse Hosted Collaboration Mediation Fulfillment MediaSense Prime Collaboration Assurance Prime Collaboration Provisioning Prime License Manager SocialMiner Unified Communications Manager IM and Presence Service (IM&P) Unified Contact Center Express (UCCx) Unified Intelligence Center (UIC) Unity Connection Virtualized Voice Browser Workarounds o There are no workarounds that address this vulnerability. Fixed Software o 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: https://www.cisco.com/c/en/us/products/end-user-license-agreement.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 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 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: https://www.cisco.com/c/en/us/support/web/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 Customers are advised to upgrade to an appropriate fixed software release or apply the corresponding patch file as indicated in the following table: Cisco Unified Fix Options Communications Manager Major Release Prior to 10.5(2) Migrate to 10.5(2) and apply patch file ciscocm.V10-5-2-SU7-SU8_CSCvo70834_C0003-1.cop.sgn 10.5(2) Apply patch file ciscocm.V10-5-2-SU7-SU8_CSCvo70834_C0003-1.cop.sgn 11.5 Apply patch file ciscocm.V11-5-1-SU5-SU6_CSCvo70834_C0003-1.cop.sgn Apply patch file 12.0 ciscocm.V12-0-1-22900-11_CSCvo70834_C0003-1.cop.sgn or upgrade to 12.0(1)SU3 Apply patch file 12.5 ciscocm.V12-5-1-10000-22_CSCvo70834_C0003-1.cop.sgn or upgrade to 12.5(1)SU1 The patch files are available in the Cisco Unity Connection Utilities - COP-Files section of the software downloads page for each release. Instructions for applying the patch are in the release notes that accompany each patch file. Exploitation and Public Announcements o 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 o This vulnerability was found during the resolution of a Cisco TAC support case. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-20190703-cucm-dos Revision History o +---------+----------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +---------+----------------------------+----------+--------+--------------+ | | Add the Unified | Summary, | | | | 1.1 | Communications Manager | Affected | Final | 2019-July-09 | | | Session Management Edition | Products | | | | | as a vulnerable product. | | | | +---------+----------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2019-July-03 | +---------+----------------------------+----------+--------+--------------+ - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXSQJW2aOgq3Tt24GAQhooA/7BtaF1kXVfZAmyt+CfMLyRIF4eNC1gy4h ba3mYvlRsvw3zOnBFpDs27S7Pb/jiSLrXaGmut9SZfpAm06PpPcaN+mtjgICi8/A QrltaYQzu/zrtTAfylr+cVuExg6pPpJmzUW8v0F/FR+dh2PMFtmpJ0m7tg8hzRAf 6ddVT+6f86NmSfM521xPIQ89mWlFkIHn5u5tYe43P4cqJ13xv77Csy8ftTfodOjP lnZHu4ONG2PQSvAWYIKVcwqE+ZekOh/Uvl7T1qPICPk9emI4vzVdTPscPAYoPts/ HR46sS8+TUMbcXu3OlZCj4RCp2vFxt5Uy/4dCUKHXElIZMKk2r5bgZWi2Bl23Cj2 Dyjkz6oD9amnhIkFy2r72QiXvAAiH70vH+4s1F+iUKWLfCnP2eBCjwoGHkotHSAd Q0smKbkf47i/KZDIGogOkEylmgtCtMjRODG2v5M8M5Qp53MSt62MEkYGvm28DNGY fBWf2eict88G2m9MR0R32iLUce5unE+ui5e4p2E7rOZ6QBgmw+7rgqWsc53WzB9z DGEx3XqFuSpv//2Hc0gcHhAH+xfQFkY0sl0B6A+zAPDsIj4geGWK+RwIqf8sZrBG 191KMwd11CSF40C3KWepMgMBBbyHFse23tOdH6LY68LHJuLRtkvfzIZXcS8k5mBX bzLYEbLzLgo= =ukwy -----END PGP SIGNATURE-----