Multiple Vulnerabilities in Cisco ASA 5500 Series Adaptive Security Appliances and Cisco Catalyst 6500 Series ASA Services Module

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Updated:May 31, 2014
Document ID:1454785019614872

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Cisco Security Advisory

Multiple Vulnerabilities in Cisco ASA 5500 Series Adaptive Security Appliances and Cisco Catalyst 6500 Series ASA Services Module

High
Advisory ID:
cisco-sa-20120314-asa
First Published:
2012 March 14 16:00 GMT
Version 1.0:
Final
Workarounds:
See below
CVE-2012-0353
CVE-2012-0354
CVE-2012-0355

More...

CVSS Score:
Base 7.8, Temporal 6.4Click Icon to Copy Verbose Score
AV:N/AC:L/Au:N/C:N/I:N/A:C/E:F/RL:OF/RC:C
CVE-2012-0353
CVE-2012-0354
CVE-2012-0355

More...

Summary

  • Cisco ASA 5500 Series Adaptive Security Appliances (ASA) and Cisco Catalyst 6500 Series ASA Services Module (ASASM) are affected by the following vulnerabilities:
    • Cisco ASA UDP Inspection Engine Denial of Service Vulnerability
    • Cisco ASA Threat Detection Denial of Service Vulnerability
    • Cisco ASA Syslog Message 305006 Denial of Service Vulnerability
    • Protocol Independent Multicast Denial of Service Vulnerability

    These vulnerabilities are independent of each other; a release that is affected by one of the vulnerabilities may not be affected by the others.

    Cisco has released software updates that address these vulnerabilities. Workarounds are available to mitigate some of the vulnerabilities. This advisory is available at the following link:

    https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120314-asa

    Note: The Cisco Catalyst 6500 Series Firewall Services Module (FWSM) may be affected by some of the vulnerabilities above.
    A separate Cisco Security Advisory has been published to disclose the vulnerabilities that affect the Cisco FWSM. This advisory is available at: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120314-fwsm

Affected Products

  • Cisco ASA 5500 Series Adaptive Security Appliances and Cisco Catalyst 6500 Series ASA Services Module are affected by multiple vulnerabilities. Affected versions of Cisco ASA Software will vary depending on the specific vulnerability. Consult the "Software Versions and Fixes" section of this security advisory for more information about the affected version.

    Cisco PIX Security Appliances may be affected by some of the vulnerabilities described in this security advisory. Cisco PIX has reached end of maintenance support. Cisco PIX Security Appliance customers are encouraged to migrate to Cisco ASA 5500 Series Adaptive Security Appliances. Consult the dedicated section for Cisco PIX Security Appliances in the "Vulnerable Products" section of this security advisory for more information about affected versions.

    Vulnerable Products

    For specific version information, refer to the "Software Versions and Fixes" section of this advisory.

    Cisco ASA UDP Inspection Engine Denial of Service Vulnerability

    The Cisco ASA UDP inspection engine that is used to inspect UDP-based protocols contains a vulnerability that could allow a remote unauthenticated attacker to trigger a reload of the Cisco ASA.

    All UDP protocols that are being inspected by the Cisco ASA UDP inspection engine may be vulnerable. The following protocols are known to use the Cisco ASA UDP inspection engine:

    • Domain Name System (DNS)
    • Session Initiation Protocol (SIP)
    • Simple Network Management Protocol (SNMP)
    • GPRS Tunneling Protocol (GTP)
    • H.323, H.225 RAS
    • Media Gateway Control Protocol (MGCP)
    • SunRPC
    • Trivial File Transfer Protocol (TFTP)
    • X Display Manager Control Protocol (XDMCP)
    • IBM NetBios
    • Instant Messaging (depending on the particular IM client/solution being used)

    Note: UDP inspection engines may be enabled by default on Cisco ASA Software. Please consult your user guide for more information.

    The default inspected ports are listed at the following link: http://www.cisco.com/en/US/docs/security/asa/asa84/configuration/guide/inspect_overview.html

    Note: The Cisco ASA UDP inspection can be applied to non-default UDP ports via class-map and policy-map commands. Any instance of use of the Cisco ASA UDP inspection engines may be vulnerable to this vulnerability, thus, configurations that include non-default UDP ports but use the Cisco ASA UDP inspection engine are considered vulnerable.

    To determine whether any of the above inspections are enabled, issue the show service-policy | include <inspection engine name> command and confirm that the command returns output. The following example shows a Cisco ASA configured to inspect IBM NetBIOS traffic: 
    ciscoasa# show service-policy | include netbios
  Inspect: netbios, packet 0, drop 0, reset-drop 0

    Cisco ASA Threat Detection Denial of Service Vulnerability

    The Cisco ASA Threat Detection feature, when configured with the Scanning Threat Mode feature and with shun option enabled, contains a vulnerability that could allow a remote unauthenticated attacker to trigger a reload of the Cisco ASA. This feature is not enabled by default.

    To determine whether the Cisco ASA Threat Detection with Scanning Threat feature and shun option is enabled, issue the show running-config threat-detection scanning-threat command and confirm that the returned output includes the shun option. The following example shows a vulnerable configuration: 
    ciscoasa# show running-config threat-detection scanning-threat
threat-detection scanning-threat shun
    Note: This feature was first introduced in Cisco ASA Software Version 8.0(2), Previous versions of Cisco ASA are not vulnerable.
    

    

    

    

    

    

    

    Cisco ASA Syslog Message 305006 Denial of Service Vulnerability
    

    A denial of service (DoS) vulnerability exists in the implementation of one specific system log (syslog) message (message ID 305006), that could cause a reload of the Cisco ASA if this syslog message needs to be generated.
    

    Syslog message ID 305006 is generated when the Cisco ASA is unable to create a network address translation for a new connection. Additional information regarding this syslog message can be found in the Cisco ASA System Log Messages guide at: http://www.cisco.com/en/US/products/ps6120/products_system_message_guides_list.html. Logging is not enabled by default on Cisco ASA, however, when logging is enabled, Cisco ASA will automatically enable syslog message 305006.
    

    Cisco ASA Software may be affected by this vulnerability if the following conditions are satisfied: 
    

      
    
    • System logging is enabled and syslogs are configured to be sent to any syslog destination (including Buffer or ASDM for example) 
      • 
    
    • Cisco ASA Software is configured in any way to generate syslog message 305006 
      • 

    
Syslog message 305006 has a default severity level of 3 (errors). Cisco ASA Software configured for logging at Level 3 or higher (that is Levels 3 through 7) may be vulnerable. To verify if logging is enabled, issue the show logging command. The following example shows a Cisco ASA with logging enabled and buffer logging enabled at Level 6 (informational):
    

    

    ciscoasa# show logging
    Syslog logging: enabled
        Facility: 20
        Timestamp logging: disabled
        Standby logging: disabled
        Debug-trace logging: disabled
        Console logging: disabled
        Monitor logging: disabled
        Buffer logging: level informational, 2 messages logged
        Trap logging: disabled
        Permit-hostdown logging: disabled
        History logging: disabled
        Device ID: disabled
        Mail logging: disabled
        ASDM logging: disabled
    


    
Using a custom message list (created via the logging list command) that includes syslog message 305006, either by severity or by explicitly including the message ID, is also a vulnerable configuration. 
    

    
The default severity level of syslog messages can be changed. If the default severity level of syslog message 305006 is changed and the device is configured to log to any destination at the new severity level, the device is vulnerable. 
    

    
Note: This vulnerability was introduced after the implementation of the new Cisco ASA  Identity Firewall (IDFW) feature. The Cisco ASA IDFW feature was introduced in the Cisco ASA Software Version 8.4(2), thus previous versions of Cisco ASA Software are not affected.
    

    Protocol Independent Multicast Denial of Service Vulnerability
    
Cisco ASA Sofware is affected by a vulnerability that may cause affected devices to reload during the processing of Protocol-Indipendent Multicast (PIM) message when multicast routing is enabled. This feature is not enabled by default.

    To verify if PIM is enabled on an interface use the show pim interface command and verify that the state on appears under the PIM column. The following example shows PIM enabled on the interface outside but disabled on the interface inside:
    

    

    ciscoasa# show pim interface

    Address          Interface          PIM  Nbr   Hello  DR         DR
                                             Count Intvl  Prior

    192.168.1.1      outside            on   0     30     1          this system
    192.168.2.1      inside             off  0     30     1          this system

    
Note: Cisco ASA is vulnerable if at least one interface state is marked with on under the PIM column of the show pim interface command output.
    

    

    

    

    

    Determine the Running Software Version
    
To determine whether a vulnerable version of Cisco ASA Software is running on an appliance, administrators can issue the show version command. The following example shows a Cisco ASA 5500 Series Adaptive Security Appliance that is running software version 8.4(1):
    

    

    ciscoasa#show version | include Version
    Cisco Adaptive Security Appliance Software Version 8.4(1) 
    Device Manager Version 6.4(1)
    
Customers who use Cisco Adaptive Security Device Manager (ASDM) to manage devices can locate the software version in the table that is displayed in the login window or upper-left corner of the Cisco ASDM window.
    

    

    

    

    Information about Cisco PIX Security Appliance
    

    Cisco PIX may be affected by some of the vulnerabilities described in this security advisory. Cisco PIX has reached end of maintenance support. Cisco PIX customers are encouraged to migrate to Cisco ASA. 
    

    All versions of the Cisco PIX Security Appliances Software are affected by the Protocol Independent Multicast Denial of Service Vulnerability.
    

    Version 8.0 of Cisco PIX Security Appliances Software is affected by the Cisco ASA UDP Inspection Engine Denial of Service Vulnerability and Cisco ASA Threat Detection Denial of Service Vulnerability 
    

    

    Cisco PIX Security Appliances is not vulnerable to Cisco ASA Syslog Message 305006 Denial of Service Vulnerability. 
    

    
                                    Products Confirmed Not Vulnerable
                                    
                                  
    

    With the exception of the Cisco FWSM, no other Cisco products are currently known to be affected by these vulnerabilities.
    

    
    

    

    • 







                          Details
                          
                        




    

  • 

    
The following section gives additional detail about each vulnerability.
    

    

    Cisco ASA UDP Inspection Engine Denial of Service Vulnerability
    

    Inspection engines are required for services that
embed IP addressing information in the user data packet or that open
secondary channels on dynamically assigned ports. Cisco ASA Software supports a number
of inspection engines for UDP and TCP-based protocols. 
    

    

    

    The Cisco ASA UDP
inspection engine that is used to inspect UDP-based protocols contains a
vulnerability that could allow a remote unauthenticated attacker to trigger a
reload of the Cisco ASA. The vulnerability is due to improper flow
handling by the inspection engine. An attacker could exploit this
vulnerability by sending a specially crafted sequence through the
affected system. 
    

    All
UDP protocols that are inspected by the inspection engine may be
vulnerable to this vulnerability. The following protocols are known to use UDP inspection engine: 
    

      
    
    • Domain Name System (DNS) 
      • 
    
    • Session Initiation Protocol (SIP) 
      • 
    
    • Simple Network Management Protocol (SNMP) 
      • 
    
    • GPRS Tunneling Protocol (GTP) 
      • 
    
    • H.323, H.225 RAS 
      • 
    
    • Media Gateway Control Protocol (MGCP) 
      • 
    
    • SunRPC 
      • 
    
    • Trivial File Transfer Protocol (TFTP) 
      • 
    
    • X Display Manager Control Protocol (XDMCP) 
      • 
    
    • IBM NetBios
      • 
    
    • Instant Messaging (depending on the particular IM client/solution being used) 
      • 

    

    Inspection engines may be enabled by default on Cisco ASA Software. Please consult your user guide for more information. The
default inspected ports are listed at the following link: http://www.cisco.com/en/US/docs/security/asa/asa84/configuration/guide/inspect_overview.html#wp1536127 
    
Note:
Only transit traffic can be used to exploit this vulnerability. This
vulnerability affects both routed and transparent firewall mode in both
single and multi-context mode. This vulnerability can be triggered by
IPv4 and IPv6 traffic. Only UDP traffic can trigger this vulnerability.
    

    
This vulnerability is documented in Cisco bug ID, CSCtq10441 (registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2012-0353. 
    

    

    Cisco ASA Threat Detection Denial of Service Vulnerability 
    

    The Cisco ASA Threat Detection feature consists of different
levels of statistics gathered for various threats, as well as scanning
threat detection, which determines when a host is performing a scan. Optionally, you
can shun any hosts that are determined to be a scanning threat.  
    

    The Cisco ASA Threat Detection feature, when configured with the Cisco ASA Scanning Threat Mode feature and with the shun option enabled, contains a vulnerability that could allow a remote, unauthenticated attacker to trigger a reload of the Cisco ASA. The vulnerability is due to
improper handling of the internal flaw that is triggered by the shun event. An
attacker may exploit this vulnerability by sending IP packets through the affected system in a way that triggers the shun option of Threat Detection scanning feature. 
    
Note:
Only transit traffic can be used to exploit this vulnerability. This
vulnerability affects both routed and transparent firewall mode only in
single context mode. This vulnerability can be triggered by IPv4 and
IPv6 traffic.
    

    
This vulnerability is documented in Cisco bug ID, CSCtw35765 (registered customers only) and has been assigned CVE ID CVE-2012-0354. 
    

    

    Cisco ASA Syslog Message 305006 Denial of Service Vulnerability
    

    Cisco ASA  Software has a System Log (syslog)
feature that provides information for monitoring normal operation and
troubleshooting network or device issues. Syslog messages are
assigned different severities (including debugging, informational, error and critical, for example) and can be sent to different logging destinations. 
    

    A denial of service vulnerability is in the
implementation of one specific syslog message (message ID 305006), that can cause a reload of the
Cisco ASA if this syslog message needs to be
generated. An attacker could exploit this vulnerability by
sending a sequence of packets that could trigger the  generation of the syslog message.
    

    Syslog message ID 305006 is generated when the Cisco ASA is unable to create a network address translation for a new
connection. Additional information about this syslog message can be found in the Cisco ASA System Log Messages guide: http://www.cisco.com/en/US/products/ps6120/products_system_message_guides_list.html 
    

    Note: Only transit traffic can be used to exploit this vulnerability. This
vulnerability affects both routed and transparent firewall mode in both
single and multi-context mode. This vulnerability can be triggered by
IPv4 and IPv6 traffic.

    
This vulnerability is documented in Cisco bug ID, CSCts39634 (registered customers only) and has been assigned CVE ID CVE-2012-0355.
    

    Protocol Independent Multicast Denial of Service Vulnerability
    

    Multicast routing is a bandwidth-conserving
technology that reduces traffic by simultaneously delivering a single
stream of information to multiple recipients. 
    

    

    

    Protocol Independent Multicast (PIM) is a multicast
routing protocol that is independent of any IP routing
protocol. PIM can leverage any unicast routing
protocols that are in use,  including
Exterior Gateway Routing Protocol (EIGRP), Open Shortest Path First (OSPF), Border Gateway Protocol (BGP), or static routes, to populate the unicast routing table. PIM uses this unicast routing
information to perform the multicast forwarding function, and is IP
protocol-independent. Although PIM is called a multicast routing
protocol, it actually uses the unicast routing table to perform the Reverse Path Forwarding (RPF) check function instead of building a
completely independent multicast routing table. PIM does not send or
receive multicast routing updates between routers as do other routing
protocols. 
    

    A vulnerability exists in the way PIM is implemented that may cause affected devices to reload
during the processing of a PIM message when multicast routing is
enabled. The vulnerability is due to improper handling of PIM messages. An attacker could exploit this vulnerability by sending a crafted PIM message to the affected system.

    
Note: This vulnerability affects Cisco ASA configured only in routed firewall mode and only in single context mode. This vulnerability can be triggered only by IPv4 PIM message as PIM over IPv6 is currently not supported.
    

    
This vulnerability is documented in Cisco bug ID, CSCtr47517 (registered customers only) and has been assigned CVE ID CVE-2012-0356.
    

    

    • 







                          Workarounds
                          
                        




    

  • 

    The following section will detail the workaround if available for each vulnerability detailed in this security advisory.
    

    

    Cisco ASA UDP Inspection Engine Denial of Service Vulnerability
    

    There are no workarounds that mitigate this vulnerability. 
    

    Cisco ASA Threat Detection Denial of Service Vulnerability
    

    If the shun option needs to be enabled, there are no workarounds that mitigate this vulnerability. However, if this option is not required, you can workaround this vulnerability by disabling this option.
    

    This can be done by issuing the no threat-detection scanning-threat shun command. The threat-detection scanning-threat command can be used afterwards to configure the feature without the shun option.
    

    To verify that the shun option has been correctly removed, issue the show running-config threat-detection scanning-threat command and confirm that the returned output does not show the shun option. The following example shows a Cisco ASA configured with the threat-detection scanning-threat feature without the shun option enabled: 
    

    

    ciscoasa# show running-config threat-detection scanning-threat
threat-detection scanning-threat 

    

    

    Cisco ASA Syslog Message 305006 Denial of Service Vulnerability
    

    A possible workaround is to prevent the Cisco ASA from generating the particular syslog message. This can be done by issuing the no logging message 305006 command. 
    

    To verify that the message is not being generated issue show running-configuration logging command. The following example shows the output of the command when the logging of message 305006 is disabled:
    

    

    ciscoasa# show run logging
    [...]
    no logging message 305006
    [...]
    

    

    

    

    Protocol Independent Multicast Denial of Service Vulnerability
    

    If PIM is required to be enabled, then there are no workarounds that mitigate this vulnerability. However, 
    
if multicast routing is required but PIM is not used, PIM can be disabled on the Cisco ASA interfaces by issuing the no pim interface-level command.

    The following example shows the interface Ethernet0/0 on a Cisco ASA device with PIM disabled:
    

    

    interface Ethernet0/0
     nameif outside
     security-level 0
     ip address 192.168.1.1 255.255.255.0
     no pim

    

    

    To verify that PIM is disabled on all interfaces, issue the show pim interface command and make sure that for all interface the PIM state is set to off. The following example shows a Cisco ASA with PIM disabled on all interfaces.
    

    

    ciscoasa# show pim interface

    Address          Interface          PIM  Nbr   Hello  DR         DR
                                             Count Intvl  Prior

    192.168.1.1      outside            off  0     30     1          this system
    192.168.2.1      inside             off  0     30     1          this system

    

    

    

    • 







                          Fixed Software
                          
                        




    

  • 

    When considering software upgrades, customers are advised to consult the Cisco Security Advisories and Responses 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 ASA UDP Inspection Engine Denial of Service Vulnerability
    

    
    
        
    
            Vulnerability
            Major Release
    
                		
            First Fixed Release
    
                		
        
    
        
    
            Cisco ASA UDP Inspection Engine Denial of Service Vulnerability - CSCtq10441
    
                		
            7.0
            Not Affected
    
                		
        
    
        
    
            7.1
            Not Affected
    
                		
        
    
        
    
            7.2
            Not Affected
        
    
        
    
            8.0
            8.0(5.25)
        
    
        
    
            8.1
            8.1(2.50)
        
    
        
    
            8.2
            8.2(5.5)
        
    
        
    
            8.3
            8.3(2.22)
        
    
        
    
            8.4
            8.4(2.1)
        
    
        
    
            8.5
            8.5(1.2)
        
    
        
    
            8.6
            Not Affected
        
    
        

    

    

    Cisco ASA Threat Detection Denial of Service Vulnerability
    

    
    
        
    
            Vulnerability
            Major Release
    
                		
            First Fixed Release
    
                		
        
    
        
    
            Cisco ASA Threat Detection Denial of Service Vulnerability - CSCtw35765
    
                		
            7.0
            Not Affected
    
                		
        
    
        
    
            7.1
            Not Affected
    
                		
        
    
        
    
            7.2
            Not Affected
    
                		
        
    
        
    
            8.0
            Migrate to 8.2(5.20) 
        
    
        
    
            8.1
            Migrate to 8.2(5.20) 
        
    
        
    
            8.2
            8.2(5.20)
        
    
        
    
            8.3
            8.3(2.29) 
        
    
        
    
            8.4
            8.4(3) 
        
    
        
    
            8.5
            8.5(1.6) 
        
    
        
    
            8.6
            8.6(1.1) 
        
    
        

    

    

    Cisco ASA Syslog Message 305006 Denial of Service Vulnerability
    

    

    
    
        
    
            Vulnerability
            Major Release
    
                		
            First Fixed Release
    
                		
        
    
        
    
            Cisco ASA Syslog Message 305006 Denial of Service Vulnerability - CSCts39634
    
                		
            7.0
            Not Affected
        
    
        
    
            7.1
            Not Affected
        
    
        
    
            7.2
            Not Affected
        
    
        
    
            8.0
            Not Affected
        
    
        
    
            8.1
            Not Affected
        
    
        
    
            8.2
            Not Affected
    
                		
        
    
        
    
            8.3
            Not Affected
        
    
        
    
            8.41
            8.4(2.11)
        
    
        
    
            8.5
            8.5(1.4) 
        
    
        
    
            8.6
            Not Affected 
        
    
        

    

    1This vulnerability has been introduced after the implementation of a new Cisco ASA feature called Identity Firewall (IDFW). Cisco ASA IDFW feature has been introduced in Cisco ASA version 8.4(2), thus, previous version of Cisco ASA are not affected. 
    

    

    Protocol Independent Multicast Denial of Service Vulnerability
    

    

    
    
        
    
            Vulnerability
            Major Release
    
                		
            First Fixed Release
    
                		
        
    
        
    
            Protocol Independent Multicast Denial of Service Vulnerability - CSCtr47517
    
                		
            7.0
            Migrate to 7.2(5.7) 
        
    
        
    
            7.1
            Migrate to 7.2(5.7) 
        
    
        
    
            7.2
            7.2(5.7) 
        
    
        
    
            8.0
            8.0(5.27) 
        
    
        
    
            8.1
            8.1(2.53) 
        
    
        
    
            8.2
            8.2(5.8)
        
    
        
    
            8.3
            8.3(2.25)
        
    
        
    
            8.4
            8.4(2.5)
        
    
        
    
            8.5
            8.5(1.2)
        
    
        
    
            8.6 
    
                		
            Not Affected 
        
    
        

    

    Recommended Releases
    

    The following table lists all recommended releases. These recommended releases contain the fixes for all vulnerabilities in this advisory. Cisco recommends upgrading to a release that is equal to or later than these recommended releases.
    

    
    
        
    
            
            
    Major Release
    
                		
            
            
    Recommended Release
    
                		
        
    
        
    
            7.0 
            Migrate to 7.2(5.7) 
        
    
        
    
            7.1 
            Migrate to 7.2(5.7) 
        
    
        
    
            7.2 
            7.2(5.7) 
        
    
        
    
            8.0 
            Migrate to 8.2(5.26) 
        
    
        
    
            8.1 
            Migrate to 8.2(5.26) 
        
    
        
    
            8.2 
            8.2(5.26) 
        
    
        
    
            8.3 
            8.4(3.8) 
        
    
        
    
            8.4 
            8.4(3.8) 
        
    
        
    
            8.5 
            8.5(1.7) 
        
    
        
    
            8.6 
            8.6(1.1) 
        
    
        

    


     
    

    Software Download
    
Cisco ASA Software can be downloaded from the Software Center on Cisco.com by visiting http://www.cisco.com/cisco/software/navigator.html

    For Cisco ASA 5500 Series Adaptive Security Appliances, navigate to Products > Security > Firewall > Firewall Appliances > Cisco ASA 5500 Series Adaptive Security Appliances > <your Cisco ASA model> > Adaptive Security Appliance (ASA) Software. Please note that some of these versions are interim versions and they can be found by expanding the Interim tab on the download page.
    

    For Cisco Catalyst 6500 Series ASA Services Module, navigate to Products > Cisco Interfaces and Modules > Cisco Services Modules >Cisco Catalyst 6500 Series ASA Services Module > ASA Services Module (ASASM) Software. Please note that some of these versions are interim versions and they can be found by expanding the Interim tab on the download page.
    

    • 






                          Exploitation and Public Announcements
                          
                        




    

  • 

    The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory 
    

    All the vulnerabilities described in this security advisory were found during internal testing or discovered during the resolution of customer support cases.
    

    • 










        Cisco Security Vulnerability Policy
        
      




    

  • 

    

    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.
    

    

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                        Revision History
                        
                      




    

  • 

    
	
		
    
			Revision 1.0
			2012-Mar-14
			Initial public release
		
    
	    

    
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    • 





















        Cisco Security Vulnerability Policy
        
      




    

  • 

    

    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.
    

    

    • 





Subscribe to Cisco Security Notifications








          
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