Several problems on Solaris10

Aki Tuomi
2019-01-02T08:46:32Z

> On 02 January 2019 at 10:36 Pierluigi Frullani <pierluigi.frullani at
gmail.com> wrote:
>
>
> On Tue, Jan 1, 2019 at 7:26 PM Sami Ketola <Sami.Ketola at
open-xchange.com>
> wrote:
>
> > Believe me it does. I used to work for Sun Microsystems for 14 years
in
> > Solaris support and sustaining and I can guarantee you that it does.
> >
> > You problem is that Solaris has concept of Secure Runtime Linker, and
for
> > trusted applications most of LD_CONFIG and LD_LIBRARY_PATH is ignored
for
> > security reasons.
> >
> > For secure applications LD_LIBRARY_PATH components are ignored for
> > non-secure directories.
> >
> > Your dovecot is probably setuid or setgid and considered as secure
> > application and secure runtime linker rules are triggered for it. Then
> > /usr/local is completely ignored from LD_LIBRARY_PATH.
> >
>
> That's rather strange.
> I too work with solaris ( and for sun in the past ) from sunos 4.1 onwards.
>
> I had this previous installation working, with LD_LIBRARY_PATH configured,
> on solaris 10 u8 since 2014.
>
> During this relativelly calm period I did a LiveUpgrade to latest solaris
> 10 ( u11 ) and the only application that stopped working is dovecot.
> This mean that ( obviously ) solaris changed something on security.
> No binary is setuid or setgid in dovecot dir:
>
> ls -l /usr/local/dovecot/sbin/dovecot
> -rwxr-xr-x   1 root     root      259452 Dec 29 14:59
> /usr/local/dovecot/sbin/dovecot
>
> root at puma find . -perm 4000
> root at puma find . -perm 2000
> root at puma find . -perm 1000
>
> but yes, I agree that eventually the SRL stuffs could make them job.
> Probably is not tied to the setuid/setgid but with the fork of a binary
> from inside another one with the LD_LIBRARY_PATH in use.
> Thus the option is ( could be ) to use the R[UN]PATH feature or the wrapper
> with the new LD_LIBRARY_PATH ( as I'm doing now altough less secure )
or
> recompile with the -R option passed to linker, as suggested by James ( and
> verified to be working at least with the "dump" ).
>
> Thanks to all
> Pigi

Dovecot master process does some fair amount of setgid/setuid, as do the actual
binaries, which might affect the linker's behaviour too.

Aki