Cisco IOS XR Software: Unauthorised Access -- Remote/Unauthenticated

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.1780
        Cisco IOS XR Software Compression ACL Bypass Vulnerability
                              7 October 2014

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco IOS XR Software
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-3396  

Original Bulletin: 
   http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3396

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Cisco Security Notice

Cisco IOS XR Software Compression ACL Bypass Vulnerability

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3396

CVE ID: CVE-2014-3396

Release Date: 2014 October 3 19:30 UTC (GMT)

Last Updated: 2014 October 6 15:06 UTC (GMT)

Related Resources:

View related Alert

Summary

A vulnerability in the port or address range compression feature for access 
control lists (ACLs) on Typhoon line cards in Cisco ASR 9000 Series 
Aggregation Services Routers could allow an unauthenticated, remote attacker 
to bypass protection offered by a configured ACL on an affected device.

The vulnerability is due to incorrect port or address range encoding in the 
compression module of an ACL applied to an interface of an affected device. An
attacker could exploit this vulnerability by sending traffic through an 
affected device that should otherwise be denied by the configured ACL. An 
exploit could allow the attacker to bypass protection offered by a configured
ACL on an affected device.

Affected Products

Product 			More Information 		CVSS

Cisco IOS XR Software 		CSCup30133 			5.0/4.1

What Is a Cisco Security Notice?

The Cisco Product Security Incident Response Team (PSIRT) publishes Cisco 
Security Notices to inform customers of low- to mid-level severity security 
issues involving Cisco products.

Customers who wish to upgrade to a software version that includes fixes for 
these issues should contact their normal support channels. Free software 
updates will not be provided for issues that are disclosed through a Cisco 
Security Notice.

For additional information about Cisco PSIRT publications, see the Cisco 
Security Vulnerability Policy at 
http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html

Customers Using Third-Party Support Organizations

Customers may have Cisco products that are provided or maintained through 
prior or existing agreements with third-party support organizations, such as 
Cisco Partners, authorized resellers, or service providers. For these 
products, customers should consult their service providers or support 
organizations to ensure that any applied workaround or fix is the most 
appropriate in the intended network before it is deployed.

Disclaimer

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.

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