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Description of problem:
After upgrading to RHEL6.5 nscd segfaults when a user runs sudo. It appears the problem is due to netgroup caching by nscd. The netgroups are stored in LDAP.

Version-Release number of selected component (if applicable):
nscd-2.12-1.132.el6.x86_64

How reproducible:
I haven't reproduced, but this is happening on multiple servers for the customer

Steps to Reproduce:
1. Need to use sudo with nscd netgroup caching and netgroups stored in LDAP

Actual results:
nscd segfaults when running sudo

Dec 13 08:54:28 server kernel: nscd[11646]: segfault at 7fffe54ed000 ip 00007ffff6e32aab sp 00007fffe54e98e8 error 6 in libc-2.12.so[7ffff6da9000+18b000]

Expected results:
nscd doesn't segfault when running sudo


Additional info:
possible workaround may be to disable netgroup caching by nscd

The solution in this case is to upgrade nss nss-tools and nss-sysinit. NSS is used by glibc for hashing functions and there are bugs in nss* that impact glibc and nscd.

*** Bug 1087838 has been marked as a duplicate of this bug. ***

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2014-1391.html