Documentation forServ-U File Server

Serv-U File Server 15.2.2 Release Notes

Release date: January 21, 2021

These release notes describe the new features, improvements, and fixed issues in Serv-U File Server 15.2.2. They also provide information about upgrades and describe workarounds for known issues.

If you are looking for previous release notes for Serv-U File Server, see Previous Version documentation.

Additional Serv-U documentation includes:

New features and improvements

Serv-U 15.2.2 contains the following new features:

  • Support for the following KEX algorithms (key exchange algorithms) for SSH
    • diffie-hellman-group-exchange-sha256
    • diffie-hellman-group14-sha256
    • diffie-hellman-group16-sha512
  • OpenSSL has been updated
  • Periodic buffer flush interval during SFTP file upload setting added to Limits:

    To access this setting, navigate to the Limits and Settings screen for Global or Domain, and select Advanced from the Limit Type dropdown. The default is 300 seconds.

  • Performance and stability improvements
  • Security enhancements
  • Serv-U 15.2.2 is signed with new code-signing certificate

If you upgrade from version 15.1.7 or older, 15.2.2 increases password security and automatically converts existing MD5 passwords using a more secure algorithm when users connect for the first time after upgrade.

If an account is not used within 90 days of the upgrade, access is restricted and the user will not be able to log in afterward. The administrator will be required to change their password.

Previous releases

For earlier Serv-U releases, please visit the Previous Versions page.


Fixed issues

Serv-U 15.2.2 fixes the following issues:

Case Number Description
n/a Public Key Authentication memory leak resolved.

658371, 654049, 645181,642642, 640814, 637749, 635320, 627109, 623216, 598885, 596970, 595555, 584662, 581139, 580863, 573286, 571535, 568615, 560739, 546652

jQuery updated to 3.5.1 to avoid security vulnerability.
632492, 624270, 619235, 606383, 586950, 579071, 560739 Issue resolved where anti-hammer counting regression led to memory leaks and 100%CPU consumption.
625116, 552322 Minor logic issue with Argon2id password hashing implementation fixed.
622549 Serv-U Groups and Users being disabled and going down randomly
619978 Serv-U account is disabled and cannot be reactivated in version 15.2.1 -IPG GIS INC.
606573 Old password is incorrect when changing password for Serv-U web client users.
605297 Missing Content Security Policy
599765 We are getting Invalid old password error.
594359 Penetration testing has found a vulnerability
580065 When Create a new user and force to change the password at next login users get "old Password is Wrong".
579545 Security Policy.
579071 After upgrade ServU to latest 15.2.1 Service has been stopping.
573524 jQuery Update on Serv-U Gateway.
563940 %USER_FULL_NAME% does not get replaced correctly when used in the Physical Path of a Virtual Path value.
557670 The $FileSize variable is not correct.
556475 Serv-U Version 15.2 User Password Issue.
549919 backup consistently fails because of an aborted connection.
541643 SSH/Data Streaming issues with Linux MFT.
513015 Error receiving file, transfer is aborted before file is fully received.
444013 Failed uploading Large Files ( 2 GB).
351225 Referrer-Policy and the Feature-Policy headers in Serv-U.
257327 SFTP failed transfer "Error receiving file".
231205 NSX manager failing to SSH into serv-u for vcenter backups.
225939 Serv-U Memory Leak.
168793 SFTP failed transfer via Cisco backup application.
127858 Cisco CUCM failed to back up.

CVE issues

SolarWinds would like to thank our Security Researchers below for reporting on these issues in a responsible manner and working with our security, product, and engineering teams to fix the vulnerability.

CVE-ID Description Severity Credited Risk?
2020-35482 Reflective XSS High Nicolas Verdier, Tehtris Yes
2020-35481 Macro Injection Critical No
2020-27994 Directory Traversal Medium Jack Misiura, The Missing Link Yes
2020-28001 Stored XSS High Yes

For Serv-U 15.2.1 fixes, see the 15.2.1 Release Notes.

For Serv-U 15.2 fixes, see the 15.2 Release Notes.


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