Citrix Workspace app 1912 LTSR for Windows (before CU1 Hotfix 1) Note that this vulnerability was originally reported against a subset of the versions above. However, further investigation has discovered potential variant forms of this attack and the affected versions have been amended accordingly. The Long Term Service Release (LTSR) program for Citrix Virtual Apps and Desktops provides stability and long-term support for Citrix Virtual Apps and Desktops releases. LTSRs are currently available for Citrix Virtual Apps and Desktops 7 1912 (this release), and for XenApp and XenDesktop Versions 7.6 and 7.15.
Citrix Ready Technical Qualified Details
Client firmware: Raspberry Pi OS version 3.3
Client OS Class: Linux
Client OS: Linux
Certified on Citrix versions: Citrix Virtual Apps and Desktops service, Citrix Virtual Apps and Desktops service on Azure, XenDesktop 7.15 LTSR, Citrix Virtual Desktops 1906, 1909, 1912 LTSR, Citrix Workspace App for Linux, Citrix Managed Desktops
Certified on Endpoint Levels:
| Test Case Summary | Results | |
| Workspace Experience | 2D Graphics - Server Rendered Virtual Apps | Passed |
| Secure Web and SaaS Apps | NA | |
| HDX Multi-Media | Audio Recording and Playback Support | Passed |
| Video Playback – Server Rendered Flash | Passed | |
| Video Playback – Server Rendered Windows Media | Passed | |
| Bi-directional Audio (VoIP) | NA | |
| RealTime Webcam Compression | Passed | |
| Windows Media redirection | Passed | |
| HTML5 Video redirection | Passed | |
| Flash redirection* | NA | |
| Skype for Business Optimization Pack* | NA | |
| HDX Integration | Browser Content Redirection | Passed |
| Citrix Gateway and Citrix ADM (formerly NetScaler MAS) verification | NA | |
| Citrix SD-WAN Optimization verification | NA | |
| Authentication | HDX PIV Smartcard On-Premises Support | NA |
| Peripherals | Common HDX Plug n Play Devices Redirection | Passed |
| Specialty Devices Redirection - 3D Mouse Support | Passed | |
| Client Printing - Citrix Universal Printer Driver | Passed | |
| HDX Multi Monitor Support | NA | |
| HDX Multi Monitor Support – 3D Apps | NA | |
| HDX Graphics | HDX 3D Pro Rich Graphics Apps Support | Passed |
| Pixel Perfect Lossless Compression | Passed | |
| H265 decoding for graphics* | NA |
We upgraded from LTSR 7.15 to LTSR 1912 two weeks ago. We see now two problems:
Citrix Workspace 1912 Ltsr Release Notes
- (1) randomly sessions of users freezes completely, in the Citrix Studio the session is connected, we have to manually disconnect, users can then reconnect. Sometimes the sessions only freezes for seconds and than start working again with all the cached keyboard input.
- (2) Some VPN users, always the same, cannot connect to the farm from their home office. The session starts and stays with a grey screen. After about two minutes, they get an error, that the ressource is not available. In the log of the VDA we see a warning 1019 TdIca '... port 2598 received an invalid packet during its SSL handshake phase'. We tried old and new workspace versions.
If they start the session without VPN through the VPX-Gateway and then start VPN, they can go on with work.