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George Dimitoglou

2001-May-31 15:00 UTC

OpenSSH, sftp problems

Hi - 

We have been fighting this issue quite some time now and a posting on
the general list some months ago did not provide any answers. So I
thought the developers may have an insight.

We are in a Tru64 4.0F environment, running C2 security and TCP
Wrappers.

We are using OpenSSH_2.5.1p2
	     OpenSSL 0.9.5 28 Feb 2000
	     Zlib 1.1.3
	     
for remote sessions and all works ok with ssh but we have many problems
with sftp.

Namely, the session ends when a user issues an 'ls' command during a
sftp session.  The following debug output may give someone a hint.


Any help would be greatly appreciated.



	host1.mydomain.com> sftp georged at machine.domain.gov
	
				:
				:
			(snipped authentication output) 
				:
				:
	Sftp2/sftp2.c:2205: buffer: 'AUTHENTICATED YES
						      '
	debug: SshTtyFlags/sshttyflags.c:294: Not a tty. (fd = 0)
	sftp> ls
	SshFCGlob/sshfc_glob.c:299: Adding file . to file list without globbing...
	SshFCGlob/sshfc_glob.c:242: File list is at it's end.
	SshFCGlob/sshfc_glob.c:76: Destroying global data...
	SshFCRecurse/sshfc_recurse.c:180: File is "raw", and it needs to be
parsed.
	SshFCRecurse/sshfc_recurse.c:258: File . is a directory. Starting recursion...
	SshFCRecurse/sshfc_recurse.c:877: Opening directory ....
	.
	Warning: ssh_packet_wrapper_input: invalid packet received: len 1399154545
closing the offending input channel.
	SshFCRecurse/sshfc_recurse.c:972: Connection down, re-establishing...
	FATAL: find_state_by_name: cannot find a state w/ name `fcr_lstat_file'.
	host1.mydomain.com> debug: Ssh2ChannelSession/sshchsession.c:1306: received
exit status : 139
	debug: Ssh2Common/sshcommon.c:660: num_channels now 0
	debug: Got session close with exit_status=139
	debug: destroying client struct...
	debug: uninitializing event loop
	
	host1.mydomain.com> 


----------------------------------------
George Dimitoglou 
Emergent-IT, Space Sciences Division

SOHO ESA/NASA Project Scientist Team 
Laboratory of Astronomy & Solar Physics
NASA Goddard Space Flight Center
Bldg. 26, G-1, Code 682.3
Greenbelt, MD 20771

george at esa.nascom.nasa.gov
----------------------------------------

Chris Adams

2001-May-31 15:26 UTC

head link

OpenSSH, sftp problems

Once upon a time, George Dimitoglou <george at esa.nascom.nasa.gov>
said:> We are in a Tru64 4.0F environment, running C2 security and TCP
> Wrappers.
> 
> We are using OpenSSH_2.5.1p2
> 	     OpenSSL 0.9.5 28 Feb 2000
> 	     Zlib 1.1.3
> 	     
> for remote sessions and all works ok with ssh but we have many problems
> with sftp.
> 
> Namely, the session ends when a user issues an 'ls' command during
a
> sftp session.  The following debug output may give someone a hint.
It is fixed in OpenSSH 2.9p1.

The problem is that sftp-server.c uses an "ll" modifier in snprintf
when
printing a 64 bit integer.  On 32 bit platforms, "long long" is used
for
that type, which needs "ll".  On 64 bit platforms (like Alpha), a 64
bit
type is just a "long" and only needs "l".  Tru64 doesn't
understand "ll"
and segfaults when it sees it (it actually could be used as a security
hole I believe).

OpenSSH 2.9p1 tests the library snprintf to see that it accepts "ll"
and
uses its own version if "ll" doesn't work.
-- 
Chris Adams <cmadams at hiwaay.net>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.

Markus Friedl

2001-May-31 15:37 UTC

head link

OpenSSH, sftp problems

What kind of sftp program is this?

looks like the commercial version and not openssh.


On Thu, May 31, 2001 at 11:00:08AM -0400, George Dimitoglou
wrote:> 
> Hi - 
> 
> We have been fighting this issue quite some time now and a posting on
> the general list some months ago did not provide any answers. So I
> thought the developers may have an insight.
> 
> We are in a Tru64 4.0F environment, running C2 security and TCP
> Wrappers.
> 
> We are using OpenSSH_2.5.1p2
> 	     OpenSSL 0.9.5 28 Feb 2000
> 	     Zlib 1.1.3
> 	     
> for remote sessions and all works ok with ssh but we have many problems
> with sftp.
> 
> Namely, the session ends when a user issues an 'ls' command during
a
> sftp session.  The following debug output may give someone a hint.
> 
> 
> Any help would be greatly appreciated.
> 
> 
> 
> 	host1.mydomain.com> sftp georged at machine.domain.gov
> 	
> 				:
> 				:
> 			(snipped authentication output) 
> 				:
> 				:
> 	Sftp2/sftp2.c:2205: buffer: 'AUTHENTICATED YES
> 						      '
> 	debug: SshTtyFlags/sshttyflags.c:294: Not a tty. (fd = 0)
> 	sftp> ls
> 	SshFCGlob/sshfc_glob.c:299: Adding file . to file list without globbing...
> 	SshFCGlob/sshfc_glob.c:242: File list is at it's end.
> 	SshFCGlob/sshfc_glob.c:76: Destroying global data...
> 	SshFCRecurse/sshfc_recurse.c:180: File is "raw", and it needs to
be parsed.
> 	SshFCRecurse/sshfc_recurse.c:258: File . is a directory. Starting
recursion...
> 	SshFCRecurse/sshfc_recurse.c:877: Opening directory ....
> 	.
> 	Warning: ssh_packet_wrapper_input: invalid packet received: len 1399154545
closing the offending input channel.
> 	SshFCRecurse/sshfc_recurse.c:972: Connection down, re-establishing...
> 	FATAL: find_state_by_name: cannot find a state w/ name
`fcr_lstat_file'.
> 	host1.mydomain.com> debug: Ssh2ChannelSession/sshchsession.c:1306:
received exit status : 139
> 	debug: Ssh2Common/sshcommon.c:660: num_channels now 0
> 	debug: Got session close with exit_status=139
> 	debug: destroying client struct...
> 	debug: uninitializing event loop
> 	
> 	host1.mydomain.com> 
> 
> 
> ----------------------------------------
> George Dimitoglou 
> Emergent-IT, Space Sciences Division
> 
> SOHO ESA/NASA Project Scientist Team 
> Laboratory of Astronomy & Solar Physics
> NASA Goddard Space Flight Center
> Bldg. 26, G-1, Code 682.3
> Greenbelt, MD 20771
> 
> george at esa.nascom.nasa.gov
> ----------------------------------------
> 
> 
>

George Dimitoglou

2001-May-31 15:41 UTC

head link

OpenSSH, sftp problems

Hi Markus -
No, it is the free version.


George
> 
> What kind of sftp program is this?
> 
> looks like the commercial version and not openssh.
> 
> 
> On Thu, May 31, 2001 at 11:00:08AM -0400, George Dimitoglou wrote:
> > 
> > Hi - 
> > 
> > We have been fighting this issue quite some time now and a posting on
> > the general list some months ago did not provide any answers. So I
> > thought the developers may have an insight.
> > 
> > We are in a Tru64 4.0F environment, running C2 security and TCP
> > Wrappers.
> > 
> > We are using OpenSSH_2.5.1p2
> > 	     OpenSSL 0.9.5 28 Feb 2000
> > 	     Zlib 1.1.3
> > 	     
> > for remote sessions and all works ok with ssh but we have many
problems
> > with sftp.
> > 
> > Namely, the session ends when a user issues an 'ls' command
during a
> > sftp session.  The following debug output may give someone a hint.
> > 
> > 
> > Any help would be greatly appreciated.
> > 
> > 
> > 
> > 	host1.mydomain.com> sftp georged at machine.domain.gov
> > 	
> > 				:
> > 				:
> > 			(snipped authentication output) 
> > 				:
> > 				:
> > 	Sftp2/sftp2.c:2205: buffer: 'AUTHENTICATED YES
> > 						      '
> > 	debug: SshTtyFlags/sshttyflags.c:294: Not a tty. (fd = 0)
> > 	sftp> ls
> > 	SshFCGlob/sshfc_glob.c:299: Adding file . to file list without 
globbing...> > 	SshFCGlob/sshfc_glob.c:242: File list is at it's end.
> > 	SshFCGlob/sshfc_glob.c:76: Destroying global data...
> > 	SshFCRecurse/sshfc_recurse.c:180: File is "raw", and it
needs to be
parsed.> > 	SshFCRecurse/sshfc_recurse.c:258: File . is a directory. Starting 
recursion...> > 	SshFCRecurse/sshfc_recurse.c:877: Opening directory ....
> > 	.
> > 	Warning: ssh_packet_wrapper_input: invalid packet received: len 
1399154545 closing the offending input channel.> > 	SshFCRecurse/sshfc_recurse.c:972: Connection down, re-establishing...
> > 	FATAL: find_state_by_name: cannot find a state w/ name
`fcr_lstat_file'.
> > 	host1.mydomain.com> debug: Ssh2ChannelSession/sshchsession.c:1306:
received exit status : 139> > 	debug: Ssh2Common/sshcommon.c:660: num_channels now 0
> > 	debug: Got session close with exit_status=139
> > 	debug: destroying client struct...
> > 	debug: uninitializing event loop
> > 	
> > 	host1.mydomain.com> 
> > 
> > 
> > ----------------------------------------
> > George Dimitoglou 
> > Emergent-IT, Space Sciences Division
> > 
> > SOHO ESA/NASA Project Scientist Team 
> > Laboratory of Astronomy & Solar Physics
> > NASA Goddard Space Flight Center
> > Bldg. 26, G-1, Code 682.3
> > Greenbelt, MD 20771
> > 
> > george at esa.nascom.nasa.gov
> > ----------------------------------------
> > 
> > 
> > 

----------------------------------------
George Dimitoglou 
Emergent-IT, Space Sciences Division

SOHO ESA/NASA Project Scientist Team 
Laboratory of Astronomy & Solar Physics
NASA Goddard Space Flight Center
Bldg. 26, G-1, Code 682.3
Greenbelt, MD 20771

george at esa.nascom.nasa.gov
----------------------------------------

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