Bug 17183 - /etc/pam.d/rlogin bypasses /etc/nologin
/etc/pam.d/rlogin bypasses /etc/nologin
Status: CLOSED RAWHIDE
Product: Red Hat Linux
Classification: Retired
Component: rsh (Show other bugs)
4.2
i386 Linux
medium Severity medium
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Assigned To: Nalin Dahyabhai
: Security
: 20518 20525 (view as bug list)
Depends On:
Blocks:
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Reported: 2000-09-01 13:35 EDT by jhs28
Modified: 2008-05-01 11:37 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2000-09-01 13:35:30 EDT
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Description jhs28 2000-09-01 13:35:28 EDT
rsh-server packages 
rsh-server-0.16-12.i386.rpm	(RedHat 6.2)
rsh-server-0.17-2.2.i386.rpm	(pinstripe)
(and possibly previous versions)

have what I consider are incorrect settings in /etc/pam.d/rlogin: 
auth       sufficient   /lib/security/pam_rhosts_auth.so
...
auth       required     /lib/security/pam_nologin.so

This means that rlogins can bypass /etc/nologin.

I believe the nologin and rhosts_auth entries should be reversed:
auth       required     /lib/security/pam_nologin.so
auth       sufficient   /lib/security/pam_rhosts_auth.so

(n.b. I'm not trying to be alarmist by assigning a security severity level,
but some admins might depend on /etc/nologin for security)
Comment 1 Jeff Johnson 2000-10-12 12:44:45 EDT
Fixed (as suggested) in rsh-0.17-2.4.
Comment 2 Phil Knirsch 2001-06-16 11:13:57 EDT
*** Bug 20518 has been marked as a duplicate of this bug. ***
Comment 3 Phil Knirsch 2001-06-16 11:15:44 EDT
*** Bug 20525 has been marked as a duplicate of this bug. ***

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