Cisco IOS Software Internet Key Exchange Memory Leak Vulnerability

A vulnerability in the Internet Key Exchange (IKE) protocol of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak that could lead to a device reload.

Advisory ID: cisco-sa-20130925-ike

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130925-ike

Revision 1.0

For Public Release 2013 September 25 16:00  UTC (GMT)

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Summary

A vulnerability in the Internet Key Exchange (IKE) protocol of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak that could lead to a device reload.

The vulnerability is due to incorrect handling of malformed IKE packets by the affected software. An attacker could exploit this vulnerability by sending crafted IKE packets to a device configured with features that leverage IKE version 1 (IKEv1).

Although IKEv1 is automatically enabled on a Cisco IOS Software and Cisco IOS XE Software when IKEv1 or IKE version 2 (IKEv2) is configured, the vulnerability can be triggered only by sending a malformed IKEv1 packet.

In specific conditions, normal IKEv1 packets can also cause an affected release of Cisco IOS Software to leak memory.

Only IKEv1 is affected by this vulnerability.

An exploit could cause Cisco IOS Software not to release allocated memory, causing a memory leak. A sustained attack may result in a device reload.

Cisco has released free software updates that address this vulnerability. There are no workarounds to mitigate this vulnerability.
This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130925-ike


Note: The September 25, 2013, Cisco IOS Software Security Advisory bundled publication includes eight Cisco Security Advisories. All advisories address vulnerabilities in Cisco IOS Software. Each Cisco IOS Software Security Advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all Cisco IOS Software vulnerabilities in the September 2013 bundled publication.

Individual publication links are in "Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication" at the following link:

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep13.html


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Affected Products






Vulnerable Products


Although only IKEv1 packets can be used to trigger this vulnerability, devices that are running Cisco IOS Software or Cisco IOS XE Software are vulnerable when they are configured to use IKEv1 or IKEv2.

Configuring IKEv2 on Cisco IOS Software or Cisco IOS XE Software automatically enables IKEv1.

A number of features use IKEv1, including different types of VPNs such as the following:



LAN-to-LAN VPN
Remote access VPN (excluding SSLVPN)
Dynamic Multipoint VPN (DMVPN)
Group Domain of Interpretation (GDOI)


The preferred method to determine whether a device has been configured for IKE is to issue the show ip sockets or show udp EXEC command. If the device has UDP port 500, UDP port 4500, or UDP port 848 open, it is processing IKE packets.




In the following example, the device is processing IKE packets in UDP port 500 and UDP port 4500, using either IP version 4 (IPv4) or IP version 6 (IPv6):





router# show udp
Proto        Remote      Port      Local       Port  In Out  Stat TTY OutputIF  
17       --listen--          192.168.130.21    500   0   0 1001011   0  
17(v6)   --listen--          UNKNOWN           500   0   0 1020011   0  
17       --listen--          192.168.130.21   4500   0   0 1001011   0  
17(v6)   --listen--          UNKNOWN          4500   0   0 1020011   0  
!--- Output truncated
router#





To determine the Cisco IOS Software release that is running on a Cisco product, administrators can log in to the device and issue the show version command to display the system banner. The system banner confirms that the device is running Cisco IOS Software by displaying text similar to "Cisco Internetwork Operating System Software" or "Cisco IOS Software." The image name displays in parentheses, followed by "Version" and the Cisco IOS Software release name. Other Cisco devices do not have the show version command or may provide different output.

The following example identifies a Cisco product that is running Cisco IOS Software Release 15.0(1)M1 with an installed image name of C3900-UNIVERSALK9-M:
Router> show version Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1)Technical Support: http://www.cisco.com/techsupportCopyright (c) 1986-2009 by Cisco Systems, Inc.Compiled Wed 02-Dec-09 17:17 by prod_rel_team !--- output truncated  
Additional information about Cisco IOS Software release naming conventions is available in "White Paper: Cisco IOS and NX-OS Software Reference Guide" at http://www.cisco.com/web/about/security/intelligence/ios-ref.html.






Products Confirmed Not Vulnerable


Cisco IOS XR Software is not affected by this vulnerability.

Cisco ASA 5500 Series Adaptive Security Appliance is not affected by this vulnerability.

No other Cisco products are currently known to be affected by this vulnerability.

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Details


The IKE protocol is used in the IP Security (IPsec) protocol suite to negotiate cryptographic attributes that will be used to encrypt or authenticate the communication session. These attributes include cryptographic algorithm, mode, and shared keys. The result of IKE is a shared session secret that will be used to derive cryptographic keys.

Cisco IOS Software or Cisco IOS XE Software support IKE for IPv4 and IPv6 communications.  IKE communication can use any of the following UDP ports:


UDP port 500
UDP port 4500, Network Address Translation (NAT) Traversal (NAT-T)
UDP port 848,  Group Domain of Interpretation (GDOI)

A vulnerability in the Internet Key Exchange (IKE) protocol of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak that could lead to a device reload.

The vulnerability is due to incorrect handling of malformed IKE packets by the affected software. An attacker could exploit this vulnerability by sending crafted IKE packets to a device configured with features that leverage IKE version 1 (IKEv1).

Although IKEv1 is automatically enabled on a Cisco IOS Software and Cisco IOS XE Software when IKEv1 or IKE version 2 (IKEv2) is configured, the vulnerability can be triggered only by sending a malformed IKEv1 packet.

In specific conditions, normal IKEv1 packets can also cause an affected release of Cisco IOS Software to leak memory.

Only IKEv1 is affected by this vulnerability.

An exploit could cause Cisco IOS Software not to release allocated memory, causing a memory leak. A sustained attack may result in a device reload.
An attacker could exploit this vulnerability using either IPv4 or IPv6 on any of the listed UDP ports.



How to Determine Whether the Vulnerability Has Been Exploited

To determine whether the vulnerability has been exploited on an affected device, issue the show memory debug leaks summary command from the command-line interface.

The following example shows the output of an affected Cisco IOS or Cisco IOS XE device where there are observed memory leaks in IKE FSM CONTEXT:



Router#show memory debug leaks summary
Adding blocks for GD...

                 I/O memory                
Alloc PC        Size     Blocks      Bytes    What

                 Processor memory                
Alloc PC        Size     Blocks      Bytes    What

0x651A3D38 0000000092 0000000005 0000000460    IKE FSM CONTEXT
0x651A3D38 0000000104 0000000002 0000000208    IKE FSM CONTEXT
0x651A3D38 0000000112 0000000002 0000000224    IKE FSM CONTEXT
0x651A3D38 0000000156 0000000002 0000000312    IKE FSM CONTEXT

Note: The show memory debug leaks summary command may be CPU intensive and should be used with caution.

This vulnerability is documented in Cisco bug ID CSCtx66011 (registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2013-5473.


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Vulnerability Scoring Details



Cisco has scored the vulnerability in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this security advisory is in accordance with CVSS version 2.0.

CVSS is a standards-based scoring method that conveys vulnerability severity and helps organizations determine the urgency and priority of a response.

Cisco has provided a base and temporal score. Customers can also compute environmental scores that help determine the impact of the vulnerability in their own networks.

Cisco has provided additional information regarding CVSS at the following link:

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

Cisco has also provided a CVSS calculator to compute the environmental impact for individual networks at the following link:



http://intellishield.cisco.com/security/alertmanager/cvss








CSCtx66011 - Cisco IOS Software Internet Key Exchange Memory Leak Vulnerability

Calculate the environmental score of CSCtx66011




CVSS Base Score - 7.8




Access Vector


Access Complexity


Authentication


Confidentiality Impact


Integrity Impact


Availability Impact




Network


Low


None


None


None


Complete




CVSS Temporal Score - 6.4




Exploitability


Remediation Level


Report Confidence




Functional


Official-Fix


Confirmed



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Impact


Successful exploitation of the vulnerability may cause Cisco IOS Software or Cisco IOS XE Software not to release allocated memory, causing a memory leak. A sustained attack may result in a device reload.
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Software Versions and Fixes



When considering software upgrades, customers are advised to consult the Cisco Security Advisories, Responses, and Notices archive at http://www.cisco.com/go/psirt and review subsequent advisories 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.


Cisco IOS Software

Each row of the following Cisco IOS Software table corresponds to a Cisco IOS Software train. If a particular train is vulnerable, the earliest releases that contain the fix are listed in the First Fixed Release column. The First Fixed Release for All Advisories in the September 2013 Bundled Publication column lists the earliest possible releases that correct all the published vulnerabilities in the Cisco IOS Software Security Advisory bundled publication. Cisco recommends upgrading to the latest available release where possible.

The Cisco IOS Software Checker allows customers to search for Cisco Security Advisories that address specific Cisco IOS Software releases. This tool is available on the Cisco Security Intelligence Operations (SIO) portal at http://tools.cisco.com/security/center/selectIOSVersion.x




Major Release

     Availability of Repaired Releases



Affected 12.0-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2013 Cisco IOS Software Security Advisory Bundled Publication



There are no affected 12.0 based releases



Affected 12.2-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2013 Cisco IOS Software Security Advisory Bundled Publication



12.2EX

Not vulnerable


Vulnerable; First fixed in Release 15.0SE




12.2EY

Not vulnerable


Vulnerable; First fixed in Release 15.2S




12.2EZ

Not vulnerable


Releases prior to 12.2(60)EZ2 are vulnerable; Releases 12.2(60)EZ2 and later are not vulnerable. First fixed in Release 15.0SE




12.2IRB

Not vulnerable


Vulnerable; First fixed in Release 12.2SRE




12.2IRC

Not vulnerable


Vulnerable; First fixed in Release 12.2SRE




12.2IRD

Not vulnerable


Vulnerable; First fixed in Release 12.2SRE




12.2IRE

Not vulnerable


Vulnerable; First fixed in Release 12.2SRE




12.2IRF

Not vulnerable


Vulnerable; First fixed in Release 12.2SRE




12.2IRG

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2IRH

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2IRI

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2IXG

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2IXH

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2MC

Not vulnerable


Vulnerable; First fixed in Release 15.1M




12.2MRA

Not vulnerable


Vulnerable; First fixed in Release 12.2SRE




12.2MRB

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2SB

Not vulnerable


12.2(33)SB15




12.2SCA

Not vulnerable


Vulnerable; First fixed in Release 12.2SCH




12.2SCB

Not vulnerable


Vulnerable; First fixed in Release 12.2SCH




12.2SCC

Not vulnerable


Vulnerable; First fixed in Release 12.2SCH




12.2SCD

Not vulnerable


Vulnerable; First fixed in Release 12.2SCH




12.2SCE

Not vulnerable


Vulnerable; First fixed in Release 12.2SCH




12.2SCF

Not vulnerable


Vulnerable; First fixed in Release 12.2SCH




12.2SCG

Not vulnerable


Vulnerable; First fixed in Release 12.2SCH




12.2SCH

Not vulnerable


12.2(33)SCH1




12.2SE

Not vulnerable


12.2(55)SE8




12.2SEG

Not vulnerable


Vulnerable; First fixed in Release 15.0SE




12.2SG

Not vulnerable



12.2(53)SG10; available December 2013 *




12.2SGA

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2SM

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2SQ

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2SRA

Not vulnerable


Vulnerable; First fixed in Release 12.2SRE




12.2SRB

Not vulnerable


Vulnerable; First fixed in Release 12.2SRE




12.2SRC

Not vulnerable


Vulnerable; First fixed in Release 12.2SRE




12.2SRD

Not vulnerable


Vulnerable; First fixed in Release 12.2SRE




12.2SRE

Not vulnerable


12.2(33)SRE9




12.2STE

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2SV

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2SVD

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2SVE

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2SW

Not vulnerable


Vulnerable; First fixed in Release 15.1M




12.2SXF

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2SXH

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2SXI

Not vulnerable


12.2(33)SXI12




12.2SXJ

Not vulnerable


12.2(33)SXJ6




12.2SY

Not vulnerable


Vulnerable; First fixed in Release 15.0SY




12.2WO

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2XNA

Please see Cisco IOS XE Software Availability


Please see Cisco IOS XE Software Availability




12.2XNB

Please see Cisco IOS XE Software Availability


Please see Cisco IOS XE Software Availability




12.2XNC

Please see Cisco IOS XE Software Availability


Please see Cisco IOS XE Software Availability




12.2XND

Please see Cisco IOS XE Software Availability


Please see Cisco IOS XE Software Availability




12.2XNE

Please see Cisco IOS XE Software Availability


Please see Cisco IOS XE Software Availability




12.2XNF

Please see Cisco IOS XE Software Availability


Please see Cisco IOS XE Software Availability




12.2XO

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




12.2ZYA

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




Affected 12.3-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2013 Cisco IOS Software Security Advisory Bundled Publication



There are no affected 12.3 based releases



Affected 12.4-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2013 Cisco IOS Software Security Advisory Bundled Publication



There are no affected 12.4 based releases



Affected 15.0-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2013 Cisco IOS Software Security Advisory Bundled Publication



There are no affected 15.0 based releases



Affected 15.1-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2013 Cisco IOS Software Security Advisory Bundled Publication



15.1EY

Not vulnerable


Vulnerable; First fixed in Release 15.2S




15.1GC

Not vulnerable


Vulnerable; First fixed in Release 15.1M




15.1M

15.1(4)M5


15.1(4)M7




15.1MR

Releases up to and including 15.1(1)MR4 are not vulnerable.


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




15.1MRA

Not vulnerable


15.1(3)MRA2




15.1S

Cisco IOS XE devices: Please see Cisco IOS XE Software Availability


15.1(3)S6
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability



15.1SG

Cisco IOS XE devices: Please see Cisco IOS XE Software Availability


15.1(2)SG1
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability



15.1SNG

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




15.1SNH

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




15.1SNI

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




15.1SVD

Not vulnerable


Not vulnerable




15.1SVE

Not vulnerable


Not vulnerable




15.1SVF

Not vulnerable


Not vulnerable




15.1SY

Not vulnerable



15.1(1)SY2; Available on 28-OCT-13
15.1(2)SY



15.1T

Not vulnerable


Vulnerable; First fixed in Release 15.1M




15.1XO

Not vulnerable


Not vulnerable




Affected 15.2-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2013 Cisco IOS Software Security Advisory Bundled Publication



15.2E

Not vulnerable


Not vulnerable




15.2GC

15.2(3)GC1
15.2(4)GC


Vulnerable; migrate to any release in 15.4T




15.2JA

Not vulnerable


15.2(4)JA1




15.2JAX

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




15.2JB

Not vulnerable


15.2(2)JB2




15.2JN

Not vulnerable


Not vulnerable




15.2M

Not vulnerable


15.2(4)M4




15.2S

15.2(4)S

Cisco IOS XE devices: Please see Cisco IOS XE Software Availability


15.2(4)S4
Cisco IOS XE devices: Please see Cisco IOS XE Software Availability



15.2SA

Not vulnerable


15.2(2)SA




15.2SNG

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




15.2SNH

Not vulnerable


Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.




15.2SNI

Not vulnerable


Vulnerable; First fixed in Release 15.3S




15.2T

15.2(3)T3


15.2(3)T4




Affected 15.3-Based Releases

First Fixed Release

First Fixed Release for All Advisories in the September 2013 Cisco IOS Software Security Advisory Bundled Publication



There are no affected 15.3 based releases


* Cisco Catalyst 4500 Series Switches with Cisco Catalyst 4500 Supervisor Engines 6-E or 6L-E can migrate to Cisco IOS Software Release 15.1SG.




Cisco IOS XE Software
For a mapping of Cisco IOS XE Software releases to Cisco IOS Software releases, refer to Cisco IOS XE 2 Release Notes, Cisco IOS XE 3S Release Notes, and Cisco IOS XE 3SG Release Notes.




Cisco IOS XE Software Release

First Fixed Release

First Fixed Release for All Advisories in the September 2013 Cisco IOS Software Security Advisory Bundled Publication



2.1.x

Not vulnerable

Vulnerable; migrate to 3.4.6S or later.



2.2.x

Not vulnerable

Vulnerable; migrate to 3.4.6S or later.



2.3.x

Not vulnerable

Vulnerable; migrate to 3.4.6S or later.



2.4.x

Not vulnerable

Vulnerable; migrate to 3.4.6S or later.



2.5.x

Not vulnerable

Vulnerable; migrate to 3.4.6S or later.



2.6.x

Not vulnerable

Vulnerable; migrate to 3.4.6S or later.



3.1.xS

Not vulnerable

Vulnerable; migrate to 3.4.6S or later.



3.1.xSG

Not vulnerable

Vulnerable; migrate to 3.4.1SG or later.



3.2.xS

Not vulnerable

Vulnerable; migrate to 3.4.6S or later.



3.2xSE

Not vulnerable

3.2.3SE



3.2.xSG

Not vulnerable

Vulnerable; migrate to 3.4.1SG or later.



3.2.xXO

Not vulnerable

Vulnerable; migrate to 3.3.0XO or later.



3.2.xSQ

Not vulnerable

Vulnerable; migrate to 3.3.0SQ or later.



3.3.xS

Not vulnerable

Vulnerable; migrate to 3.4.6S or later.



3.3xSG

Not vulnerable

Vulnerable; migrate to 3.4.1SG or later.



3.3xXO

Not vulnerable

Not vulnerable



3.3xSQ

Not vulnerable

Not vulnerable



3.4.xS

Only releases 3.4.2S through 3.4.5S are vulnerable.

3.4.6S



3.4.xSG

Not vulnerable

3.4.1SG*



3.5.xE

Not vulnerable

Not vulnerable



3.5.xS

Not vulnerable

Vulnerable; migrate to 3.7.4S or later.



3.6.xS

3.6.1S

Vulnerable; migrate to 3.7.4S or later.



3.7.xS

Not vulnerable

3.7.4S



3.8.xS

Not vulnerable

Vulnerable; migrate to 3.9.2S or later.



3.9.xS

Not vulnerable

3.9.2S



3.10.xS

Not vulnerable

Not vulnerable


* Cisco Catalyst 4500 Series Switches with Cisco Catalyst 4500 Supervisor Engines 7-E and 7L-E and Cisco Catalyst 4500-X Series Switches can migrate to Cisco IOS XE Software Release 3.4SG.


Cisco IOS XR Software
Cisco IOS XR Software is not affected by any of the vulnerabilities that are disclosed in the September 2013 Cisco IOS Software Security Advisory Bundled Publication.





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Workarounds


There are no workarounds for this vulnerability.

The following identification mechanism exists for this vulnerability.

Embedded Event Manager (EEM)
A Cisco IOS Embedded Event Manager (EEM) policy that is based on Tool Command Language (Tcl) can be used on vulnerable Cisco IOS devices to identify and detect a memory leak that is caused by this vulnerability. The policy allows administrators to monitor the memory for the affected process on a Cisco IOS device. When Cisco IOS EEM detects potential exploitation of this vulnerability, the policy can trigger a response by sending an alert to the network administrator, who could then decide to implement an upgrade or reload the device to recover the lost memory at a suitable time. The example policy is based on a Tcl script that sends a syslog message when the memory keeps dropping and reaches EEM_IKE_BUFF_INCR_THRES and when the IKE buffers have dropped EEM_IKE_BUFF_INCR_THRES times. If IKE buffers are freed the counter starts counting from zero. After generating the memory leak syslog message the script re-initializes.
The Tcl script is available for download in Cisco Beyond: Embedded Event Manager (EEM) Scripting Community.

A sample device configuration follows:




event manager environment EEM_MEM_LEAK_INTERVAL 20
event manager environment EEM_MEM_LEAK_MAX_RUNTIME 5
event manager environment EEM_IKE_BUFF_INCR_THRES 3
event manager environment EEM_FREE_MEMORY_THRES 70
event manager directory user policy "flash:/"
event manager policy eem_ike_mem_leak.tcl


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Obtaining Fixed Software



Cisco has released free software updates that address the vulnerability described in this advisory. Prior to deploying software, customers are advised to consult their maintenance providers or check the software for feature set compatibility and known issues that are specific to their environments.

Customers may only install and expect support for feature sets they have purchased. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html.



Customers with Service Contracts






Customers Using Third-Party Support Organizations









Customers Without Service Contracts











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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.

This vulnerability was discovered during resolution of a support case.

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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.

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Distribution



This advisory is posted on Cisco Security Intelligence Operations at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130925-ike

Additionally, a text version of this advisory is clear signed with the Cisco PSIRT PGP key and circulated among the following e-mail addresses:
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

Future updates of this advisory, if any, will reside on Cisco.com but may not be announced on mailing lists. Users can monitor this advisory's URL for any updates.

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Revision History





Revision 1.0

2013-September-25

Initial public release


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Cisco Security Procedures


Complete information about reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco is available on Cisco.com at http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html. This web page includes instructions for press inquiries regarding Cisco Security Advisories. All Cisco Security Advisories are available at http://www.cisco.com/go/psirt.