There are no workarounds that address this vulnerability. However, administrators can mitigate this vulnerability by disabling the Range Request Forward feature.
Range Request Forward is disabled by default. If Range Request Forward is enabled, administrators can disable it using the steps shown in the following example:
cisco-wsa> rangerequestdownload
Range requests are currently Enabled.
Are you sure you want to change the setting? [N]>
cisco-wsa> Y
cisco-wsa> commit
While this mitigation has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment