SSH server specs:
-----------------------
Redhat Linux 6.2
Custom built 2.2.17 kernel
OpenSSL 0.9.5a (update from RedHat).
OpenSSH 2.5.1p1
I am using my Linux box as an Internet gateway. I wanted to keep
the box as secure as possible while still having the functionality I
needed. The only way to connect to my server is through SSH. A fair
majority of the time I am attempting to connect to the server from a
Windows box (whether at work, home, or on the road...). The software that
I have used extensively in the past is a great little program called PuTTY
(http://www.chiark.greenend.org.uk/~sgtatham/putty/). It supports SSH1 and
SSH2 protocols. I have never had any problems in the past using these two
pieces of software together. PuTTY has worked flawlessly with OpenSSH
2.2.0p1 and 2.3.0p1.
However, using OpenSSH 2.5.1p1 PuTTY will no longer work. PuTTY
will briefly flash a window and exit. No error messages are given from
PuTTY. However, the sshd daemon outputs the following line to the Linux
log file:
Feb 21 10:13:04 rugen sshd[21915]: fatal: xfree: NULL pointer given as argument
Everything works fine if I downgrade to OpenSSH 2.3.0p1.
For completeness sake, I'll include some info about the client machine:
PuTTY version: 0.51 (also downloaded snapshot on Feb 21st, 2001).
OS: Windows 98
Connection mode: SSH
Options selected:
--------------------------
Connection
Terminal type string xterm
Auto-login username (blank) (also tried using local login name)
SSH
Remote command (blank)
Attempt TIS or Cryptocard... (not checked)
Allows agent forwarding (not checked)
Don't allocate a pseudo-term. (not checked)
Preferred Protocol vers. SSH2
Preferred Encryption algo. 3DES
Imitate MAC bug in com... (not checked)
The author of putty (putty at projects.tartarus.org) has already been
contacted about this problem. I hope that enough information was given and
is helpful in locating the problem.
You install OpenSSH how? Redhat RPMs? OpenSSH.com RPMS? (If your using this one you *MUST* run 0.9.6 OpenSSL) Compiled it yourself? Also have you tried 2.5.1p2? - Ben On Wed, 21 Feb 2001, Neal Barney wrote:> SSH server specs: > ----------------------- > Redhat Linux 6.2 > Custom built 2.2.17 kernel > OpenSSL 0.9.5a (update from RedHat). > OpenSSH 2.5.1p1 > > I am using my Linux box as an Internet gateway. I wanted to keep > the box as secure as possible while still having the functionality I > needed. The only way to connect to my server is through SSH. A fair > majority of the time I am attempting to connect to the server from a > Windows box (whether at work, home, or on the road...). The software that > I have used extensively in the past is a great little program called PuTTY > (http://www.chiark.greenend.org.uk/~sgtatham/putty/). It supports SSH1 and > SSH2 protocols. I have never had any problems in the past using these two > pieces of software together. PuTTY has worked flawlessly with OpenSSH > 2.2.0p1 and 2.3.0p1. > However, using OpenSSH 2.5.1p1 PuTTY will no longer work. PuTTY > will briefly flash a window and exit. No error messages are given from > PuTTY. However, the sshd daemon outputs the following line to the Linux > log file: > > Feb 21 10:13:04 rugen sshd[21915]: fatal: xfree: NULL pointer given as argument > > Everything works fine if I downgrade to OpenSSH 2.3.0p1. > > For completeness sake, I'll include some info about the client machine: > > PuTTY version: 0.51 (also downloaded snapshot on Feb 21st, 2001). > OS: Windows 98 > Connection mode: SSH > > Options selected: > -------------------------- > Connection > Terminal type string xterm > Auto-login username (blank) (also tried using local login name) > > SSH > Remote command (blank) > Attempt TIS or Cryptocard... (not checked) > Allows agent forwarding (not checked) > Don't allocate a pseudo-term. (not checked) > Preferred Protocol vers. SSH2 > Preferred Encryption algo. 3DES > Imitate MAC bug in com... (not checked) > > The author of putty (putty at projects.tartarus.org) has already been > contacted about this problem. I hope that enough information was given and > is helpful in locating the problem. > >
On Wed, 21 Feb 2001, Neal Barney wrote:> SSH server specs: > ----------------------- > Redhat Linux 6.2 > Custom built 2.2.17 kernel > OpenSSL 0.9.5a (update from RedHat). > OpenSSH 2.5.1p1[snip]> Feb 21 10:13:04 rugen sshd[21915]: fatal: xfree: NULL pointer given > as argumentAre you using the RPM version of OpenSSH? If yes, could you send me the output of "rpm -qa | sort"? This will help me determine whether the problem is caused by a library incompatability. Could you also try rebuilding from the .src.rpm? "rpm --rebuild openssh-2.5.1p2-1.src.rpm", install the result and see if you can elicit the same problem. -d -- | Damien Miller <djm at mindrot.org> \ ``E-mail attachments are the poor man's | http://www.mindrot.org / distributed filesystem'' - Dan Geer