Severity: High

Description: PROC LUA contains a vulnerability that allows a user of SAS^® software to bypass the LOCKDOWN option.

Potential Impact: A user can execute arbitrary code on the server.

Click the Hot Fix tab in this note to access the hot fix for this issue.

Note: On the Hot Fix tab are hot fixes that disable all of the operating-system library functions for PROC LUA when the procedure runs with the LOCKDOWN option. If you need to access the library functions, add the following line to your SAS AUTOEXEC_USERMODS file for the appropriate server:

Note: On the Hot Fix tab are hot fixes that disable all of the input/output library functions for PROC LUA when the procedure runs with the LOCKDOWN option. If you need to access the library functions, add the following line to your SAS AUTOEXEC_USERMODS file for the appropriate server:

Note: For SAS^® Viya^® 3.5, if running in a multi-tenant environment, modify the autoexec_usermods file that is specific to the tenant requiring the library functions. 

Operating System and Release Information

Viya on Windows: An update for this issue is available for SAS Viya 3.5. For instructions on how to access and apply software updates, see the Updating Your SAS Viya software section in the SAS Viya 3.5 for Windows Deployment Guide at

Viya on Linux: An update for this issue is available for SAS Viya 3.5. For instructions on how to access and apply software updates, see the Updating Your SAS Viya software section in the SAS Viya 3.5 for Linux Deployment Guide at

A fix for this issue for Base SAS 9.4_M7 is available at:

A fix for this issue for Base SAS 9.4_M6 is available at:

A fix for this issue for Base SAS 9.4_M5 is available at:

A fix for this issue for SAS Threaded Kernel 9.4_M5 is available at: