PK21126: LOGON TO FTP REMOTE SERVER FAILS IF PASSWORD BEGINS WITH ! (EXCLAMATION)

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• If user has a password that begins with a ! (exclamation point),
  this password will not be passed to the remote system at the
  password prompt.
  
  This is because FTP is interpreting the ! as an escape character
  which
  1) When  FTP is invoked from the unix shell, FTP will pass
  the text following the ! to unix for processing as a local unix
  command.
  2) When FTP is invoked from MVS, FTP interprets this as an
  attempt to enter a unix shell command and rejects it with
  the following error message is returned:
  331 OK need password.
  PASSWORD
  
  
  Command  !  may only be issued from client running under the
  z/OS UNIX shell.
  >>> PASS
  530 Invalid user ID and/or password. Cannot log in.
  Command:
  

Local fix

• After the password failure message, the circumvention depends on
  mode ftp is in:
  
  When attempting to log on from MVS, after the password failure,
  add the password to the USER subcommand
  
  331 OK need password.
  PASSWORD
  
  
  Command  !  may only be issued from client running under the
  z/OS UNIX shell.
  >>> PASS
  530 Invalid user ID and/or password. Cannot log in.
  Command:
  user tony !passwd
  
  When attempting to log on from the unix shell:
  >>> USER tony
  331 OK need password.
  PASSWORD
  
  tony: FSUM7351 not found
  PASSWORD
  
  >>> PASS
  530 Invalid user ID and/or password. Cannot log in.
  Command:
  pass !passwd
  >>> PASS
  230 Welcome
  Command:
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of the IBM Communications Server   *
  *                 for z/OS Version 1 Release 7 IP: FTP         *
  *                 client                                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: If a password or userid started with    *
  *                      an exclamation point (!) it was         *
  *                      incorrectly treated as a command.       *
  *                      This stopped the user from accessing    *
  *                      the remote FTP server.                  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Code was present in z/OS V1R7 that forced any data read by the
  FTP client that started with an exclamation point to be treated
  as if it were a z/OS UNIX shell command.
  In the TSO environment this produced error message:
  EZA2788I Command ! may only be issued from client running under
  the z/OS shell.
  In the z/OS UNIX shell environment this produced error message:
  FSUM7351 not found
  +-------------------------------------------------------------+
  + Please check our Communications Server for OS/390 homepages +
  + for common networking tips and fixes.  The URL for these    +
  + homepages can be found in Informational APAR II11334.       +
  +-------------------------------------------------------------+
  

Problem conclusion

• Code was added that now allows a userid or password starting
  with an exclamation mark to be passed to the FTP server for
  validation by the server.
  
  * Cross Reference between External and Internal Names
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UK12701 PK26974

Modules/Macros

• EZAFTPCU
  

Fix information

• Fixed component name

  TCP/IP V3 MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R170 PSY UK12701

     UP06/05/17 P F605

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.