Re: [Radiusplugin-users] openvpn segfault when username contains space

[Ralf Lübben]

This time I found the problem.

At auth_user_pass_verify the commonname is not changed:
"user1 test" stays "user1 test"

but

at client_connect the commonname is changed:
"user1 test" becomes "user1_test"

The plugin expects that the commonname isn't changed between both events. 

I have to change this behavior in the future.



Am Freitag 27 Februar 2009 16:04:23 schrieb William Cooley:
> I just found this post on the dev mailing list.
> http://lists.gnu.org/archive/html/radiusplugin-devel/2009-02/msg00000.html
> It's not clear if the username had the whitespace in the radius server
> or if the crash occurred when someone  accidentally added a space.
> I just tried adding a space before or after the username and openvpn did
> not crash. So I'm guessing this occurred because the username had a
> space in the radius database.
>
> William Cooley wrote:
> > http://openvpn.net/index.php/documentation/manuals/openvpn-20x-manpage.ht
> >ml
> >
> > and go to the "auth-user-pass-verify script method" section.
> >
> > Sorry I don't have a log file. (Openvpn resets it on restart) I had
> > the server set to verb 4 and it still wasn't clear what the problem
> > was. The plugin did not show any error messages.
> > I finally figured it out because openvpn always crashed when this
> > particular user attempted to connect. The openvpn log showed the
> > username as having a _ not a space.
> >
> > Ralf Lübben wrote:
> >> Hi,
> >>
> >> someone else told me about a similiar problem, when the username
> >> starts with a space. But I couldn't redo it.
> >>
> >> Can you send me a link where I find the information, that OpenVPN
> >> changes characters?
> >> Can you also send me a log file? Or tell me where the plugin crashes?
> >>
> >> Thanks.
> >>
> >> Ralf
> >>
> >> On Thursday 26 February 2009 22:57:39 William Cooley wrote:
> >>> When an openvpn username contains a space openvpn segfaults and does
> >>> not
> >>> restart.
> >>> Ubuntu 8.04 64bit
> >>> Openvpn 2.1_rc7 and 2.0.9
> >>> RadiusPlugin Version 2.0c
> >>> Freeradius
> >>> I have not tried to duplicate this bug with a different environment.
> >>>
> >>> I thought openvpn changes illegal characters to _ so maybe the _ caused
> >>> the problem.
> >>> I've simply disabled the use of non alphanumeric characters on new
> >>> freeradius usernames to resolve this.
> >>> -William
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> Radiusplugin-users mailing list
> >>> address@hidden
> >>> http://lists.nongnu.org/mailman/listinfo/radiusplugin-users
> >>
> >> _______________________________________________
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> >> address@hidden
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> >
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