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#38 openssh-5.0_* AIX5.3 sftp with f-secure client

open
nobody
None
5
2009-05-04
2009-05-04
Anonymous
No

OS: AIX 5.3 TL9 SP2
OpenSSH: Packages openssh-5.0_r1 and openssh-5.0_r2 (both affected)
OpenSSL: Version 0.9.8.803

f-secure sftp client (version 5.2 build 10) hangs after connecting with "Reading Folder - Please wait"

Debug output on sshd/sftp-server side:
...
May 4 14:47:29 server auth|security:debug sshd[393256]: debug1: Client protocol version 1.99; client software version 3.1.0 F-SECURE SSH for Windows
May 4 14:47:29 server auth|security:debug sshd[393256]: debug1: no match: 3.1.0 F-SECURE SSH for Windows
May 4 14:47:29 server auth|security:debug sshd[393256]: debug1: Enabling compatibility mode for protocol 2.0
May 4 14:47:29 server auth|security:debug sshd[393256]: debug1: Local version string SSH-2.0-OpenSSH_5.0
...
May 4 14:47:32 server auth|security:info sshd[393256]: subsystem request for sftp
May 4 14:47:32 server auth|security:debug sshd[393256]: debug1: subsystem: exec() /usr/sbin/sftp-server -f auth -l debug
May 4 14:47:32 server auth|security:debug sshd[348340]: debug1: permanently_set_uid: 0/0
May 4 14:47:32 server auth|security:info sftp-server[348340]: session opened for local user root from [10.205.17.42]
May 4 14:47:32 server auth|security:info sftp-server[348340]: received client version 2
--- here the connection hangs
May 4 14:47:42 server auth|security:info sshd[393256]: Received disconnect from 10.205.17.42: 11: Disconnect requested by Windows SSH Client.
May 4 14:47:42 server auth|security:debug sshd[393256]: debug1: do_cleanup
May 4 14:47:42 server auth|security:debug sftp-server[348340]: debug1: read eof
May 4 14:47:42 server auth|security:info sftp-server[348340]: session closed for local user root ...

Debug output on sftp client side:
...
Remote version: SSH-2.0-OpenSSH_5.0
Remote version has rekey incompatibility bug.
Remote version is OpenSSH, KEX guesses disabled.
...
ssh_file_client_receive_proc: bad VERSION
--- here the client hangs
DISCONNECT received: Disconnect requested by Windows SSH Client.
...

All 4.7 packages are NOT affected. Unfortunately openssh-4.7_new contains the "In function SINK" problem and the older 4.7 packages contain the in openssh-4.7_new fixed compression bug. Both are thus unusable for me (production environment).

Is there a chance to get the sftp issue fixed?

Regards,
Gottfried

Discussion

  • Frank
    Frank
    2009-05-28

    I am also having trouble with this issue. openssh-5.0.5302 on AIX 5.3 is affected. The break in compatibility between f-secure sftp clients and OpenSSH on AIX is causing difficulty in staging a gradual migration to OpenSSH from F-Secure.