Check: LVDA-VD-000015
Citrix Virtual Apps and Desktop 7.x Linux Virtual Delivery Agent STIG:
LVDA-VD-000015
(in version v1 r1)
Title
The application must initiate a session lock after a 15-minute period of inactivity. (Cat II impact)
Discussion
A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. Rather than relying on the user to manually lock their application session prior to vacating the vicinity, applications need to be able to identify when a user's application session has idled and take action to initiate the session lock. The session lock is implemented at the point where session activity can be determined and/or controlled. This is typically at the operating system-level and results in a system lock, but may be at the application-level where the application interface window is secured instead.
Check Content
All timer values are defined in the registration table. Retrieve current value using the following command: /opt/Citrix/VDA/bin/ctxreg, /opt/Citrix/VDA/bin/ctxreg dump |grep MaxIdleTime If MaxIdleTime is not set to "15 minutes" or less, this is a finding.
Fix Text
Set value for Idle Timer /opt/Citrix/VDA/bin/ctxreg update -k "HKLM\System\CurrentControlSet\Control\Citrix\WinStations\cgp" -v "MaxIdleTime" -d "0x0000000F" /opt/Citrix/VDA/bin/ctxreg update -k "HKLM\System\CurrentControlSet\Control\Citrix\WinStations\tcp" -v "MaxIdleTime" -d "0x0000000F" /opt/Citrix/VDA/bin/ctxreg update -k "HKLM\System\CurrentControlSet\Control\Citrix\WinStations\ssl" -v "MaxIdleTime" -d "0x0000000F" where "0x0000000F" is hexadecimal for 15
Additional Identifiers
Rule ID: SV-234256r628796_rule
Vulnerability ID: V-234256
Group Title: SRG-APP-000003
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000057 |
The information system initiates a session lock after the organization-defined time period of inactivity. |
Controls
Number | Title |
---|---|
AC-11 |
Session Lock |