Cisco has released free software updates that address the 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 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 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 of this advisory as evidence of entitlement to a free upgrade.

Fixed Releases

In the following table, the left column lists major releases of Cisco AsyncOS Software for ESA. The right column indicates whether a major release is affected by the vulnerability described in this advisory and the first minor release that includes the fix for this vulnerability.
Customers should upgrade to an appropriate release as indicated in the following table:

Cisco AsyncOS Software for ESA Major Release First Fixed Release for This Vulnerability
 Prior to 9.0  Affected; Migrate to 11.0.2-044 MD
 9.x  Affected; Migrate to 11.0.2-044 MD
 10.x  Affected; Migrate to 11.0.2-044 MD
 11.0.x  11.0.2-044 MD1
 11.1.x  11.1.2-023 MD2
 12.x  Not affected

1: 11.0.2-044 will run on all legacy hardware for ESA models x70, x80, x90 and the virtual appliances.
: 11.1.2-023 will run on ESA models x80, x90 and the virtual appliances.

Note that Cisco provides regular maintenance of products in the Cisco
Cloud Security (CES) service solution, which includes Cisco
Security Appliances and Cisco Content Security Management Appliances.
Customers can also request a software upgrade by contacting Cisco TAC.

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