Vanilla redhat 6.2 with openldap and nss_ldap.
When telnetting to the server from a pc which doesn't have reverse address
in the dns it disconnects after a password.
There's no details in the log.
tcp_wrappers (tcpd) are NOT used.
Attaching strace to the inetd (-f -p) shows that the process /bin/login
which is passed parameters: -h 10.0.0.1 -p and environment which consists
of REMOTEHOST=10.0.0.1 and TERM=xterm dies with SEGMENTATION FAULT.
The 10.0.0.1 is the address of the client.
/etc/nsswitch.conf lists ldap in passwd, group, shadow, NOT hosts.
/etc/resolv.conf, /etc/host.conf are simple and usual. I was able to
reproduce it on freshly installed system.
pam and openldap are updated to ones from updates.
all components are from redhat.com
This is exteremely annoying bug.