Cisco StarOS Interface Forwarding Denial of Service Vulnerability
Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.
When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to upgrade 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.
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.
Fixed Releases
Customers should upgrade to an appropriate fixed release as indicated in the applicable table in this section. In the following table, the first column lists major releases of the Cisco StarOS and VPC System Software and the second column indicates the first corresponding release that includes the fix for this vulnerability.
| Cisco VPC (StarOS Major Release) | First Fixed Release |
|---|---|
| N4.0 (19.2) | Affected; migrate to N5.1.9 (21.1.v7) |
| N4.2 (19.3) | Affected; migrate to N5.1.9 (21.1.v7) |
| N4.5 (20.0) | Affected; migrate to N5.1.9 (21.1.v7) |
| N4.6 (20.1) | Affected; migrate to N5.1.9 (21.1.v7) |
| N4.7 (20.2) | Affected; migrate to N5.1.9 (21.1.v7) |
| N5.0 (21.0) | N5.0.4 (21.0.v4) |
| N5.1 (21.1) | N5.1.9 (21.1.v7) |
| N5.5 (21.3) | N5.5.0 (21.3.v10) |
from Cisco Security Advisory https://ift.tt/2qMXnFp