ID

VAR-200805-0206

CVE

CVE-2008-1742

TITLE

Cisco Unified Communications Manager Service disruption in (DoS) Vulnerabilities

DESCRIPTION

Memory leak in the Certificate Trust List (CTL) Provider service in Cisco Unified Communications Manager (CUCM) 5.x before 5.1(3) allows remote attackers to cause a denial of service (memory consumption and service interruption) via a series of malformed TCP packets, as demonstrated by TCPFUZZ, aka Bug ID CSCsj80609. TCPFUZZ A series of deliberately created, as demonstrated by TCP Service disruption via packets (DoS) There is a possibility of being put into a state. The problem is Bug ID : CSCsj80609 It is a problem.Please refer to the “Overview” for the impact of this vulnerability. These issues affect the following components: Certificate Trust List (CTL) Provider Certificate Authority Proxy Function (CAPF) Session Initiation Protocol (SIP) Simple Network Management Protocol (SNMP) Trap An attacker can exploit these issues to cause denial-of-service conditions in the affected application. ---------------------------------------------------------------------- Secunia Network Software Inspector 2.0 (NSI) - Public Beta The Public Beta has ended. Thanks to all that participated. This vulnerability is reported in version 5.x. 2) Another error within the CTL Provider service can be exploited to consume large amounts of memory resources via a series of specially crafted packets sent to default port 2444/TCP. This vulnerability is reported in versions 5.x and 6.x. This vulnerability is reported in versions 4.1, 4.2, and 4.3. This vulnerability is reported in versions 5.x and 6.x. This vulnerability is reported in versions 4.1, 4.2, 4.3, 5.x, and 6.x. SOLUTION: Update to the fixed versions. PROVIDED AND/OR DISCOVERED BY: Reported by the vendor. ORIGINAL ADVISORY: http://www.cisco.com/warp/public/707/cisco-sa-20080514-cucmdos.shtml ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. These vulnerabilities were discovered internally by Cisco. Workarounds that mitigate some of these vulnerabilities are available. This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20080514-cucmdos.shtml. The software version can also be determined by running the command show version active via the command line interface (CLI). No other Cisco products are currently known to be affected by these vulnerabilities. Details ======= Cisco Unified Communications Manager is the call processing component of the Cisco IP Telephony solution that extends enterprise telephony features and functions to packet telephony network devices, such as IP phones, media processing devices, voice-over-IP (VoIP) gateways, and multimedia applications. The CTL Provider service listens by default on TCP port 2444 and is user configurable. The CTL Provider service is enabled by default. There is a workaround for this vulnerability. The CTL Provider service listens by default on TCP port 2444 and is user configurable. There is a workaround for this vulnerability. The CAPF service listens by default on TCP port 3804 and is user configurable. The CAPF service is disabled by default. There is a workaround for this vulnerability. SIP-Related Vulnerabilities Cisco Unified Communications Manager versions 5.x and 6.x contain a vulnerability in the handling of malformed SIP JOIN messages that may result in a DoS condition. There is no workaround for this vulnerability. There is no workaround for this vulnerability. There is no workaround for this vulnerability. The SNMP Trap Agent service listens by default on UDP port 61441. There is a workaround for this vulnerability. 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 * CSCsj80609 - Memory Leak Due to TCPFUZZ on Port 2444 (CTLProvider) 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 * CSCsi98433 - CTLProvider leaks memory in certain scenarios 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 * CSCsk46770 - CAPF crash with network traffic 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 * CSCsi48115 - CM 6.1 stops providing service when receiving malformed Join sip-header 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 * CSCsk46944 - CCM service restarts on receiving a valid SIP Packet 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 * CSCsl22355 - CCM does not validate SIP URL input properly 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 * CSCsj24113 - CCM Process Coredump/Restart During ISIC Execution Against Port 61441 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 in this advisory may result in the interruption of voice services. 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. It can downloaded at the following link: http://www.cisco.com/pcgi-bin/tablebuild.pl/callmgr-61?psrtdcat20e2 Workarounds =========== CTL Provider Related Vulnerabilities To mitigate against the CTL Provider service vulnerabilities (CSCsj80609 and CSCsi98433), system administrators can disable the CTL Provider service if it is not needed. The CTL Provider service is controlled via the Cisco CTL Provider menu selection. It is possible to mitigate the CTL Provider vulnerabilities by implementing filtering on screening devices. Note: It is possible to change the default port of the CTL Provider service (TCP port 2444). If changed, filtering should be based on the values used. CAPF Related Vulnerability To mitigate against the CAPF service vulnerability (CSCsk46770), system administrators can disable the CAPF service if it is not needed. If phones are not configured to use certificates, then the CAPF service can be disabled. The CAPF service is controlled by the Cisco Certificate Authority Proxy Function menu selection. It is possible to mitigate the CAPF vulnerability by implementing filtering on screening devices. If the CAPF service is enabled, permit access to TCP port 3804 only from networks that contain IP phone devices needing to utilize the CAPF service. SIP-Related Vulnerabilities It is possible to mitigate the SIP vulnerabilities by implementing filtering on screening devices. SNMP Trap-Related Vulnerability To mitigate against the SNMP Trap service vulnerability (CSCsj24113), system administrators can disable the SNMP Trap service. To disable the Windows SNMP service, navigate to Start > Programs > Administrative Tools > Services, and stop the SNMP Service. Note: The SNMP Trap Service listed in the Windows Service configuration screen is not applicable to this vulnerability and disabling it does not provide any benefit as a workaround for this vulnerability. For Cisco Unified Communications Manager 5.x and 6.x systems, the SNMP Trap service is controlled via the Cisco CallManager SNMP Service selection on the Control Center Feature Services screen. It is possible to mitigate the SNMP Trap service vulnerability by implementing filtering on screening devices. Permit access to UDP port 61441 only from management systems that need access to the SNMP Trap service. 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. ustomers 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/products/prod_warranties_item09186a008088e31f.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/warp/public/687/Directory/DirTAC.shtml 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 discovered internally by Cisco. 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-20080514-cucmdos.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-teams@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 | 2008-May-14 | 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. -----BEGIN PGP SIGNATURE----- iD8DBQFIKw3c86n/Gc8U/uARAo4iAJ461QSdwp9yXivfv/yWe4Xlj2wNaACcD/nW GpnghuWFfH2gIjp6Yk6857c= =L6xn -----END PGP SIGNATURE-----

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

resource management error

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Cisco Security bulletin

SOURCES

LAST UPDATE DATE

2024-11-23T22:14:44.711000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE