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AUSCERT External Security Bulletin Redistribution
ESB-2014.1181
Cisco Security Notice Cisco IOS XR Software MPLS Packet
Denial of Service Vulnerability
17 July 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco IOS XR Software
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2014-3321
Original Bulletin:
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3321
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Cisco Security Notice Cisco IOS XR Software MPLS Packet Denial of Service
Vulnerability
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3321
CVE ID: CVE-2014-3321
Release Date: 2014 July 15 12:18 UTC (GMT)
Last Updated: 2014 July 15 18:30 UTC (GMT)
Related Documents:
Summary
A vulnerability in parsing crafted Multiprotocol Label Switching (MPLS)
packets in Cisco IOS XR Software for ASR 9000 Series Aggregation Services
Routers could allow an unauthenticated, adjacent attacker to cause a lockup
and eventual reload of a network processor chip and a line card processing
traffic.
The vulnerability is due to insufficient logic in parsing MPLS packets. An
attacker could exploit this vulnerability by sending a stream of crafted MPLS
packets to be routed by a bridge-group virtual interface (BVI) on the affected
device. An exploit could allow the attacker to cause a lockup and eventual
reload of a network processor chip and a line card, leading to a denial of
service (DoS) condition.
Affected Products
Product More Information CVSS
Cisco IOS XR Software CSCuo91149 5.7/4.7
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.
A stand-alone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy, and may lack important information
or contain factual errors.
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