ftpd and PAM

[Paul Howarth]

Paul Howarth wrote:
> The PAM config files for vsftpd and prpftpd look like this:
> 
> #%PAM-1.0
> session    optional     pam_keyinit.so    force revoke
> auth       required     pam_listfile.so item=user sense=deny 
> file=/etc/vsftpd/ftpusers onerr=succeed
> auth       required     pam_shells.so
> auth       include      system-auth
> account    include      system-auth
> session    include      system-auth
> session    required     pam_loginuid.so
> 
> So it makes sense for ftpd_t to be able to set the login uid and create 
> a session keyring:
> 
> logging_set_loginuid(ftpd_t)
> allow ftpd_t self:key { write search link };
> 
> 
> Curiously, I've done this locally but still get this AVC when logging in 
> on proftpd, with an open dovecot IMAP session on the same server:
> 
> type=AVC msg=audit(1182853960.377:103383): avc:  denied  { link } for 
> pid=24601 comm="proftpd" scontext=root:system_r:ftpd_t:s0 
> tcontext=root:system_r:dovecot_t:s0 tclass=key

FWIW, I'm also getting in /var/log/secure:

Jun 26 12:09:42 goalkeeper proftpd: PAM audit_log_user_message() failed: 
Operation not permitted
Jun 26 12:09:42 goalkeeper proftpd[25559]: goalkeeper.intra.city-fan.org 
(::ffff:192.168.2.20[::ffff:192.168.2.20]) - PAM(setcred): System error
Jun 26 12:09:42 goalkeeper proftpd: pam_unix(proftpd:session): session 
closed for user paul
Jun 26 12:09:42 goalkeeper proftpd[25559]: goalkeeper.intra.city-fan.org 
(::ffff:192.168.2.20[::ffff:192.168.2.20]) - PAM(close_session): System 
error
Jun 26 12:09:42 goalkeeper proftpd[25559]: goalkeeper.intra.city-fan.org 
(::ffff:192.168.2.20[::ffff:192.168.2.20]) - FTP session closed.

I don't see any AVCs to go with these, and adding:

logging_send_audit_msg(ftpd_t)

doesn't seem to help.

Paul.