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AUSCERT External Security Bulletin Redistribution
ESB-2013.1457
Cisco NX-OS Software BGP Denial of Service Vulnerability
15 October 2013
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco NX-OS Software
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2012-4099 CVE-2012-4097
Original Bulletin:
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-4097
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-4099
Comment: This bulletin contains two (2) Cisco Systems security advisories.
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Cisco Security Notice
Cisco NX-OS Software BGP Denial of Service Vulnerability
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-4097
CVE ID: CVE-2012-4097
Release Date: 2013 October 4 15:40 UTC (GMT)
Last Updated: 2013 October 4 15:40 UTC (GMT)
Summary
A vulnerability in the Border Gateway Protocol (BGP) component of Cisco NX-OS
Software could allow an unauthenticated, remote attacker to create a denial of
service (DoS) condition by causing the BGP service to reset.
The vulnerability is due to improper filtering of invalid AS Path segment
types. An attacker could exploit this vulnerability by sending a malformed BGP
update to a downstream peer of the affected device. A successful exploit could
result in the downstream peer resetting the BGP connection with the affected
device.
Affected Products
Product More Information CVSS
Cisco NX-OS Software CSCtn13043 4.3/3.4
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/en/US/products/products_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.
- -------------------------------------------------------------------------
Cisco Security Notice
Cisco NX-OS Software BGP Denial of Service Vulnerability
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-4099
CVE ID: CVE-2012-4099
Release Date: 2013 October 4 15:10 UTC (GMT)
Last Updated: 2013 October 4 15:10 UTC (GMT)
Summary
A vulnerability in the Border Gateway Protocol (BGP) component of Cisco NX-OS
Software could allow an unauthenticated, remote attacker to create a denial of
service (DoS) condition by causing the BGP service to reset and resync.
The vulnerability is due to improper filtering of invalid AS Path values. An
attacker could exploit this vulnerability by sending a malformed BGP update to
a downstream peer of the affected device. A successful exploit could result in
the downstream peers resetting the BGP connection with the affected device.
Affected Products
Product More Information CVSS
Cisco NX-OS Software CSCtn13065 4.3/3.4
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/en/US/products/products_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.
- --------------------------END INCLUDED TEXT--------------------
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