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:
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 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.
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:
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.
In the following table, the left column lists major releases of Cisco
ASA Software. The right column indicates whether a major release is
affected by the vulnerability described in this advisory and the first release that includes the fix for this vulnerability.
|Cisco ASA Software
|First Fixed Release
|Prior to 9.01
|Affected, migrate to 8.4(7.31) or 9.1(7) or later
|9.0(4.39) or later
||9.1(7) or later
|9.2(4.6) or later
|9.3(3.8) or later
||9.4(2) or later
|9.5(2) or later
Cisco ASA Software releases prior to 9.1 and Cisco ASA Software Release 9.3 have reached end-of-software maintenance. Customers
migrate to a supported release.
: It is possible that certain fixed software releases for this vulnerability are affected by a bug described in Cisco Field Notice FN-64291
where a security appliance may fail to pass traffic after 213 days of uptime. Customers should review this notice before determining a course of action for addressing the vulnerability described in this advisory. The issue described in the Cisco Field Notice is not a security vulnerability.