OpenSSH, PAM and kerberos

Dag-Erling Smørgrav des at
Fri Aug 30 07:45:29 UTC 2013

Slawa Olhovchenkov <slw at> writes:
> I am try to setup single sign-on and found this is imposuble due to
> bug in OpenSSH: currently sshd do pam_authenticate() and
> pam_acct_mgmt() from child process, but pam_setcred() from paren
> proccess. pam_krb5 in pam_sm_setcred() required information from
> pam_sm_authenticate and can't work corretly (can't create
> /tmp/krb5cc_NNNN, can't set envirompent KRB5CCNAME and so).

PAM authentication in OpenSSH was broken for non-trivial cases when
privilege separation was implemented.  Fixing it properly would be very

Dag-Erling Smørgrav - des at

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