Documentation forServ-U File Server

Serv-U File Serverdo 15.2.2 Release Notes

Release date: December 21, 2020

Last updated: April 9, 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 - to here 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 latests 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 Re: 00159561: 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 fails to back up

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.

CVE fixed issues

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

CVE-ID Vulnerability Title Description Severity Credit
CVE-2020-35481 + CVE-2021-3154 Macro Injection These vulnerabilities allow an unauthenticated attacker to dump user passwords in a cleartext form. Critical Nicolas Verdier, Tehtris
CVE-2020-35482 Reflective XSS The web client share details URL was vulnerable to a XSS attack. An attacker needed to perform social engineering and pose as an authenticated user. High Nicolas Verdier, Tehtris
CVE-2020-27994 Directory Traversal This vulnerability allowed a non-privileged user to list other directories located outside their home directory. Medium Jack Misiura, The Missing Link
CVE-2020-28001 Stored XSS An authenticated user with write permissions to create directories was able to embed a XSS script to a directory name. High Jack Misiura, The Missing Link


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