ID

VAR-201008-0195

CVE

CVE-2010-2822

TITLE

Cisco ACE Module RTSP Service operation interruption in inspection function (DoS) Vulnerabilities

DESCRIPTION

Unspecified vulnerability in the RTSP inspection feature on the Cisco Application Control Engine (ACE) Module with software before A2(3.2) for Catalyst 6500 series switches and 7600 series routers, and the Cisco Application Control Engine (ACE) 4710 appliance with software before A3(2.6), allows remote attackers to cause a denial of service (device reload) via crafted RTSP packets over TCP, aka Bug IDs CSCta85227 and CSCtg14858. The Cisco Application Control Engine Application Control Engine is a solution for a portfolio of load balancing and application delivery products. RTSP is used for RealAudio, RealNetworks, Apple QuickTime 4, RealPlayer and Cisco IP/TV links. RTSP applications use TCP and UDP port 554 as control channels. Modules and applications only support RTSP over TCP. Devices that only enable RTSP detection are affected by this vulnerability. RTSP detection is not enabled by default. Note: To exploit this vulnerability, you need to complete a three-way handshake. Only Transit communication can trigger this vulnerability, and the target communication for the affected device is not affected by this vulnerability. An attacker can exploit this issue to cause an affected device to crash and reload, denying service to legitimate users. This issue is tracked by Cisco bug IDs CSCta85227 and CSCtg14858. Workarounds that mitigate some of the vulnerabilities are available. Note: These vulnerabilities are independent of each other. For specific version information, refer to the Software Versions and Fixes section of this advisory. Note: This vulnerability is independent from the other RSTP and SIP inspection vulnerabilities described in this advisory. SIP inspection is disabled by default. All rights reserved. The copyrights to certain works contained herein are owned by other third parties and are used and distributed under license. Some parts of this software are covered under the GNU Public License. A copy of the license is available at http://www.gnu.org/licenses/gpl.html. Software loader: Version 0.95 system: Version A3(1.0) [build 3.0(0)A3(0.0.148)] system image file: (nd)/192.168.65.31/scimitar.bin Device Manager version 1.1 (0) 20080805:0415 ... All rights reserved. The copyrights to certain works contained herein are owned by other third parties and are used and distributed under license. Some parts of this software are covered under the GNU Public License. A copy of the license is available at http://www.gnu.org/licenses/gpl.html. Software loader: Version 12.2[121] system: Version A2<3.0> [build 3.0(0)A2(2.99.80)] system image file: [LCP] disk0:c6ace-t1k9-mzg.A2_2_99_80.bin licensed features: no feature license is installed ... <output truncated> Products Confirmed Not Vulnerable +-------------------------------- The Cisco ACE XML Gateway, the Cisco ACE Web Application Firewall, and the Cisco ACE GSS 4400 Series Global Site Selector Appliances are not affected by any of the vulnerabilities that are described in this advisory. No other Cisco products are currently known to be affected by these vulnerabilities. Multiple vulnerabilities exist in both products. These vulnerabilities are independent of each other. The following information provides the details about each of the vulnerabilities that are addressed in this advisory. Deep packet inspection is a special case of application inspection where the ACE examines the application payload of a packet or a traffic stream and makes decisions based on the content of the data. During HTTP deep inspection, the main focus of the application inspection process is on HTTP attributes such as the HTTP header, the URL, and to a limited extent, the payload. User-defined regular expressions can also be used to detect "signatures" in the payload. SIP Inspection DoS Vulnerability ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SIP is used for call handling sessions, especially two-party conferences. SIP inspection is disabled by default. Note: TCP or UDP SIP packets may cause a device reload. 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 CSCta85227, CSCtg14858 - RTSP Inspection DoS Vulnerability 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 CSCtb54493 - HTTP, RTSP, and SIP Inspection DoS Vulnerability 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 CSCta20756 - SSL DoS Vulnerability 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 CSCta65603, CSCta71569 - SIP Inspection DoS Vulnerability 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 any of the vulnerabilities described in this security advisory may cause a reload of the affected device. Repeated exploitation could 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. Each row of the software table (below) describes the earliest possible releases that contain the fix (along with the anticipated date of availability for each, if applicable) are listed in the "First Fixed Release" column of the table. The "Recommended Release" column indicates the releases which have fixes for all the published vulnerabilities at the time of this Advisory. A device running a release in the given train that is earlier than the release in a specific column (less than the First Fixed Release) is known to be vulnerable. Cisco recommends upgrading to a release equal to or later than the release in the "Recommended Releases" column of the table. Administrators can disable RTSP inspection by issuing the "no inspect rtsp" command under the respective policy map. Note: This workaround is only feasible if RTSP inspection is not needed or required in a load-balancing deployment. HTTP, RTSP, and SIP Inspection DoS Vulnerability ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This vulnerability can be mitigated by disabling HTTP, RTSP, and SIP inspection if they are not required. Administrators can disable HTTP inspection by issuing the "no inspect http" command under the respective policy map. Administrators can disable RTSP inspection by issuing the "no inspect rtsp" command under the respective policy map. Administrators can disable SIP inspection by issuing the "no inspect sip" command under the respective policy map. Note: This workaround is only feasible if HTTP, RTSP, and SIP inspections are not needed or required in a load-balancing deployment. SSL DoS Vulnerability ~~~~~~~~~~~~~~~~~~~~~ There are no workarounds available to mitigate this vulnerability. SIP Inspection DoS Vulnerability ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This vulnerability can be mitigated by disabling SIP inspection if it is not required. SIP inspection is disabled by default. Administrators can disable SIP inspection by issuing the "no inspect sip" command under the respective policy map. Note: This workaround is only feasible if SIP inspection is not needed or required in a load-balancing deployment. 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 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 the troubleshooting of customer service requests and internal testing. 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-20100811-ace.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 | 2010-August-11 | 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----- iD8DBQFMYrc986n/Gc8U/uARAsRXAJ9mSSZZEsFDbdgF09VYUcdoSiGcDwCfQmNk Aw+GHKEq3mpY2/rCv+nq7Gg= =qoPf -----END PGP SIGNATURE-----

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

2024-11-23T22:19:06.690000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE