Date: Wed, 13 Mar 2002 12:34:02 -0800 (PST) From: Juha-Matti Tilli <juha-matti.tilli@pp.inet.fi> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/35865: pam_krb5 crashes in pam_sm_setcred() Message-ID: <200203132034.g2DKY2N15690@freefall.freebsd.org>
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>Number: 35865
>Category: misc
>Synopsis: pam_krb5 crashes in pam_sm_setcred()
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Mar 13 12:40:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator: Juha-Matti Tilli
>Release: FreeBSD 4.5-RELEASE i386
>Organization:
>Environment:
FreeBSD tykki 4.5-RELEASE FreeBSD 4.5-RELEASE #16: Fri Mar 1 19:04:50 EET 2002 juhis@tykki:/usr/obj/usr/src/sys/TYKKI i386
>Description:
pam_krb5 contains a bug in pam_sm_setcred() which causes login to die on signal 10. I put many DLOG:s to function pam_sm_setcred() and noticed that the bug is in following code:
while ((krbret = krb5_cc_next_cred(pam_context, ccache_temp,
&cursor, &creds) == 0)) {
if ((krbret = krb5_cc_store_cred(pam_context, ccache_perm,
&creds)) != 0) {
DLOG("krb5_cc_store_cred()", error_message(krbret));
(void) krb5_cc_destroy(pam_context, ccache_perm);
krb5_free_cred_contents(pam_context, &creds);
pamret = PAM_SERVICE_ERR;
goto cleanup2;
}
krb5_free_cred_contents(pam_context, &creds);
}
>How-To-Repeat:
Put following lines in login.conf and try to login with kerberos username and password
login auth requisite pam_cleartext_pass_ok.so
login auth sufficient pam_krb5.so try_first_pass debug ccache=FILE:/tmp/krb5cc_%u
login auth required pam_unix.so try_first_pass debug
login session sufficient pam_krb5.so debug ccache=FILE:/tmp/krb5cc_%u
login session required pam_unix.so debug
#login password required pam_krb5.so
#login account required pam_krb5.so
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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