ID

VAR-201108-0093

CVE

CVE-2011-2563

TITLE

Cisco Unified Communications Manager and Cisco Intercompany Media Engine Vulnerability in

DESCRIPTION

Unspecified vulnerability in the Service Advertisement Framework (SAF) in Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 8.x before 8.5(1) and Cisco Intercompany Media Engine 8.x before 8.5(1) allows remote attackers to cause a denial of service (device reload) via crafted SAF packets, aka Bug ID CSCth26669. Cisco Unified Communications Manager is a call processing component in the Cisco IP Telephony solution. The Service Advertisement Framework (SAF) has a denial of service attack. An unauthenticated attacker can use these vulnerabilities to send specially crafted SAF packets to the affected device. The attacker exploits the vulnerability to overload the device. An attacker can exploit these issues to cause an affected device to reload, denying service to legitimate users. These issues are being tracked by Cisco Bug IDs CSCth26669 and CSCth19417. Intercompany Media Engine versions 8.0.x are affected. A workaround exists for the SIP and Packet Capture Service DoS vulnerabilities. Products Confirmed Not Vulnerable +-------------------------------- All supported versions of Cisco Unified Communications Manager are affected by one or more of the vulnerabilities described in this advisory. The first DoS vulnerability involves the Packet Capture Service which is enabled by default. The Packet Capture Service fails to timeout or close idle TCP connections. This vulnerability is documented in Cisco Bug ID CSCtf97162 ( registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) identifier CVE-2011-2560. The second DoS vulnerability involves certain configurations of Media Termination Points (MTP). One-way audio may be observed when an MTP is configured with the g729ar8 codec only. In certain situations, an interruption in service may occur and a stack trace will be generated by the Session Initiation Protocol (SIP) process when processing the Session Description Protocol SDP portion of a SIP call. This vulnerability is documented in Cisco Bug ID CSCtc61990 ( registered customers only) and has been assigned CVE identifier CVE-2011-2561. The third DoS vulnerability involves a coredump when processing certain SIP INVITE messages. This vulnerability is documented in Cisco Bug ID CSCth43256 ( registered customers only) and has been assigned CVE identifier CVE-2011-2562. These vulnerabilities are documented in Cisco Bug IDs CSCth26669 ( registered customers only) and CSCth19417 ( registered customers only) and have been assigned CVE identifiers CVE-2011-2563 and CVE-2011-2564, respectively. That advisory is available at: http://www.cisco.com/warp/public/707/cisco-sa-20110824-ime.shtml Note: An established TCP connection with a three-way handshake is required to trigger the SAF vulnerabilities. Vulnerability Scoring Details +---------------------------- Cisco has provided scores for the vulnerabilities in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this Security Advisory is done in accordance with CVSS version 2.0. CVSS is a standards-based scoring method that conveys vulnerability severity and helps determine urgency and priority of response. Cisco has provided a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks. Cisco has provided an FAQ to answer additional questions regarding CVSS at: http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at http://intellishield.cisco.com/security/alertmanager/cvss * CSCtf97162 - CCM Application Restarts During TCP Flood CVSS Base Score - 7.8 Access Vector - Network Access Complexity - Low Authentication - None Confidentiality Impact - None Integrity Impact - None Availability Impact - Complete CVSS Temporal Score - 6.4 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed * CSCtc61990 - Coredump may be experienced when processing certain SIP packets CVSS Base Score - 7.1 Access Vector - Network Access Complexity - Medium Authentication - None Confidentiality Impact - None Integrity Impact - None Availability Impact - Complete CVSS Temporal Score - 5.9 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed * CSCth43256 - Coredump may be experienced when processing certain SIP packets CVSS Base Score - 7.8 Access Vector - Network Access Complexity - Low Authentication - None Confidentiality Impact - None Integrity Impact - None Availability Impact - Complete CVSS Temporal Score - 6.4 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed * CSCth26669 - CUCM may experience a reload when receiving certain UCM client msgs CVSS Base Score - 7.8 Access Vector - Network Access Complexity - Low Authentication - None Confidentiality Impact - None Integrity Impact - None Availability Impact - Complete CVSS Temporal Score - 6.4 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed * CSCth19417 - CUCM may experience a reload when receiving certain UCM client msgs CVSS Base Score - 7.8 Access Vector - Network Access Complexity - Low Authentication - None Confidentiality Impact - None Integrity Impact - None Availability Impact - Complete CVSS Temporal Score - 6.4 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed Impact ====== Successful exploitation of the vulnerabilities that are described in this advisory could result in the interruption of voice services. In certain instances, the affected Cisco Unified Communications Manager processes will restart, but repeated attacks may result in a sustained DoS condition. Software Versions and Fixes =========================== When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution. In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance. Cisco recommends upgrading to a release equal to or later than the release in the Recommended Releases column of the table. +---------------------------------------+ | Cisco Unified | Recommended | | Communications Manager | Releases | | Version | | |-------------------------+-------------| | 6.x | 6.1(5)SU3 | |-------------------------+-------------| | 7.x | 7.1(5b)SU4 | |-------------------------+-------------| | 8.0 | 8.0(3a)SU2 | |-------------------------+-------------| | 8.5 | 8.5(1)SU2, | | | 8.6(1) | +---------------------------------------+ Workarounds =========== A workaround exists for the SIP DoS vulnerabilities. SIP processing is enabled by default. Customers who do not require SIP processing can use the following instructions to disable SIP processing: * Step 1: Log into the Cisco Unified Communications Manager Administration Interface. * Step 3: Change the SIP Interoperability Enabled parameter to False, and click Save. Note: For a SIP processing change to take effect, the Cisco CallManager service must be restarted. For information on how to restart the service, refer to the "Restarting the Cisco CallManager Service" section of the document at the following location: http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/7_1_2/ccmcfg/b03dpi.html#wp1075124 It is possible to mitigate these vulnerabilities by implementing filtering on screening devices and only permitting access to TCP ports 5060 and 5061 and UDP ports 5060 and 5061 from networks that require SIP access to Cisco Unified Communications Manager servers. A workaround exists for the DoS vulnerabilities involving the Packet Capture Service in Cisco Communications Manager version 4.x. Customers who do not require the Packet Capture Service for troubleshooting can use the following instructions to disable this process: * Step 1: Log into the Cisco Unified Communications Manager Administration web interface. * Step 3: Change the Packet Capture Enabled parameter to False, and click Save. Note: For the Packet Capture Service change to take effect, the Cisco CallManager service must be restarted. For information on how to restart the service, refer to the "Restarting the Cisco CallManager Service" section of the document at the following location: http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/7_1_2/ccmcfg/b03dpi.html#wp1075124 Additional mitigations that can be deployed on Cisco devices in the network are available in the companion document "Cisco Applied Mitigation Bulletin: Identifying and Mitigating Exploitation of the Multiple Vulnerabilities in Cisco Unified Communications Manager" which is available at the following location: http://www.cisco.com/warp/public/707/cisco-amb-20110824-cucm-ime.shtml Obtaining Fixed Software ======================== Cisco has released free software updates that address these vulnerabilities. Prior to deploying software, customers should consult their maintenance provider or check the software for feature set compatibility and known issues specific to their environment. Customers may only install and expect support for the feature sets they have purchased. By installing, downloading, accessing or otherwise using such software upgrades, customers agree to be bound by the terms of Cisco's software license terms found at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html or as otherwise set forth at Cisco.com Downloads at: http://www.cisco.com/public/sw-center/sw-usingswc.shtml Do not contact psirt@cisco.com or security-alert@cisco.com for software upgrades. Customers with Service Contracts +------------------------------- Customers with contracts should obtain upgraded software through their regular update channels. For most customers, this means that upgrades should be obtained through the Software Center on Cisco's worldwide website at http://www.cisco.com Customers using Third Party Support Organizations +------------------------------------------------ Customers whose Cisco products are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers should contact that support organization for guidance and assistance with the appropriate course of action in regards to this advisory. The effectiveness of any workaround or fix is dependent on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Due to the variety of affected products and releases, customers should consult with their service provider or support organization to ensure any applied workaround or fix is the most appropriate for use in the intended network before it is deployed. Customers without Service Contracts +---------------------------------- Customers who purchase direct from Cisco but do not hold a Cisco service contract, and customers who purchase through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should acquire upgrades by contacting the Cisco Technical Assistance Center (TAC). TAC contacts are as follows. * +1 800 553 2447 (toll free from within North America) * +1 408 526 7209 (toll call from anywhere in the world) * e-mail: tac@cisco.com Customers should have their product serial number available and be prepared to give the URL of this notice as evidence of entitlement to a free upgrade. Free upgrades for non-contract customers must be requested through the TAC. Refer to: http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html for additional TAC contact information, including localized telephone numbers, and instructions and e-mail addresses for use in various languages. Exploitation and Public Announcements ===================================== The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities described in this advisory. These vulnerabilities were found during internal testing and during the troubleshooting of customer service requests. Status of this Notice: FINAL ============================ 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 stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors. Distribution ============ This advisory is posted on Cisco's worldwide website at: http://www.cisco.com/warp/public/707/cisco-sa-20110824-cucm.shtml In addition to worldwide web posting, a text version of this notice is clear-signed with the Cisco PSIRT PGP key and is posted to the following e-mail and Usenet news recipients. * cust-security-announce@cisco.com * first-bulletins@lists.first.org * bugtraq@securityfocus.com * vulnwatch@vulnwatch.org * cisco@spot.colorado.edu * cisco-nsp@puck.nether.net * full-disclosure@lists.grok.org.uk * comp.dcom.sys.cisco@newsgate.cisco.com Future updates of this advisory, if any, will be placed on Cisco's worldwide website, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the above URL for any updates. Revision History ================ +---------------------------------------+ | Revision | | Initial | | 1.0 | 2011-August-24 | public | | | | release. | +---------------------------------------+ Cisco Security Procedures ========================= Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at: http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at: http://www.cisco.com/go/psirt +-------------------------------------------------------------------- Copyright 2010-2011 Cisco Systems, Inc. All rights reserved. +-------------------------------------------------------------------- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (SunOS) iFcDBQFOVFpYQXnnBKKRMNARCOCeAPwP66zH85V+OOW8YRl94JMDc+UpiRzqoqUl 6C0WGFrBJgD/eR7bXF71he/ByVHVpfpY3qaX8M45+MqcqzIDrM6hbCY= =kz9x -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/ . There are no available workarounds to mitigate these vulnerabilities. Details ======= Cisco Intercompany Media Engine provides a technique for establishing direct IP connectivity between enterprises by combining peer-to-peer technologies with the existing public switched telephone network (PSTN) infrastructure. ---------------------------------------------------------------------- The Secunia CSI 5.0 Beta - now available for testing Find out more, take a free test drive, and share your opinion with us: http://secunia.com/blog/242 ---------------------------------------------------------------------- TITLE: Cisco Unified Communications Manager Multiple Denial of Service Vulnerabilities SECUNIA ADVISORY ID: SA45738 VERIFY ADVISORY: Secunia.com http://secunia.com/advisories/45738/ Customer Area (Credentials Required) https://ca.secunia.com/?page=viewadvisory&vuln_id=45738 RELEASE DATE: 2011-08-25 DISCUSS ADVISORY: http://secunia.com/advisories/45738/#comments AVAILABLE ON SITE AND IN CUSTOMER AREA: * Last Update * Popularity * Comments * Criticality Level * Impact * Where * Solution Status * Operating System / Software * CVE Reference(s) http://secunia.com/advisories/45738/ ONLY AVAILABLE IN CUSTOMER AREA: * Authentication Level * Report Reliability * Secunia PoC * Secunia Analysis * Systems Affected * Approve Distribution * Remediation Status * Secunia CVSS Score * CVSS https://ca.secunia.com/?page=viewadvisory&vuln_id=45738 ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI: * AUTOMATED SCANNING http://secunia.com/vulnerability_scanning/personal/ http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/ DESCRIPTION: Multiple vulnerabilities have been reported in Cisco Unified Communications Manager, which can be exploited by malicious people to cause a DoS (Denial of Service). Note: This vulnerability only affects version 7.0.x and later. The vulnerabilities are reported in versions 6.x, 7.x, and 8.x. SOLUTION: Update to version 6.1(5)SU3, 7.1(5b)SU4, 8.0(3a)SU2, 8.5(1)SU2, or 8.6(1). PROVIDED AND/OR DISCOVERED BY: Reported by the vendor. ORIGINAL ADVISORY: http://www.cisco.com/warp/public/707/cisco-sa-20110824-cucm.shtml OTHER REFERENCES: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ DEEP LINKS: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXTENDED DESCRIPTION: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXTENDED SOLUTION: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXPLOIT: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help private users keeping their systems up to date against the latest vulnerabilities. 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IOT TAXONOMY

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

lack of information

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Cisco

SOURCES

LAST UPDATE DATE

2024-11-23T22:19:02.119000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE