Citrix SSOShell.exe Memory leak
2 min read
While installing Citrix SSO 4.8 in a test environment in combination with Windows Server 2003 and Citrix XenApp 5 for Windows Server 2003 we noticed that the Citrix servers were affected by this installation. The user sessions were taking more memory than before the installation of Citrix SSO. While investigating this issue we noticed that the memory usage was growing as the session was longer active. So Citrix SSO 4.8 had a memory leak, Citrix already had a fix for this in the SSOP480WX86001 (Version 4.8.6501.0) – For Citrix Single Sign-on Plug-in 4.8 x86 hotfix which fixes the following:
New Fixes in This Release
- The plug-in appears to shut down unexpectedly after a system restart, a plug-in restart, or a logon.[From SSOP480WX86001][#230884]
- This fix addresses handle leaks during regular synchronization intervals.[From SSOP480WX86001][#231253]
- Upon detection, the plug-in manipulates the layout and positioning of certain Web page frames that contain user credentials text boxes. As a result, parts of those frames can become truncated or invisible to users. This fix introduces a registry key that adds scrollbars to such frames if necessary so that the entire contents of the affected frames become accessible to users. To enable this fix, must set the following registry key:HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\MetaFrame Password Manager\Extensions\AccessManager
Name: BHO
Type: REG_DWORD
Data: 0 (off; default); 1 (on)[From SSOP480WX86001][#231578]- The Enter Credentials dialog box does not have keyboard focus when it appears.[From SSOP480WX86001][#231580]
- This fix addresses memory leaks in SSOSHELL.exe.[From SSOP480WX86001][#231878]
- The plug-in stop synchronizing newly added credentials with the central store as a result of an Active Directory constraint violation.[From SSOP480WX86001][#231880]
- Ssoshell.exe can experience an abnormal program termination.[From SSOP480WX86001][#232744]
- When using a GPO to install the plug-in, the installer user interface appears in German. The issue applies only to the installer interface; once installed, the plug-in matches the language of the target operating system as designed.[From SSOP480WX86001][#233655]
So if you are experiencing memory leaks on SSOSHELL.exe, it’s a good advice to install this hotfix for Citrix SSO.
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Kees Baggerman
Kees Baggerman is Senior Technical Director — Performance & Solutions Engineering R&D at Nutanix, where he leads a global team responsible for defining how enterprise applications are delivered on the Nutanix platform. A former Citrix Technology Professional and NVIDIA Enterprise Platform Advisor, he has spent 15+ years driving EUC strategy and technical direction across architecture, product, and customer success. He has been writing here since 2011 — sharing what he learns at the intersection of platform engineering and enterprise IT.
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