bugtraq - [SAMBA-SECURITY] CVE-2007-0453: Buffer overrun in nss

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <45C7300E.4010509@samba.org>
Date: Mon, 05 Feb 2007 07:24:30 -0600
From: "Gerald (Jerry) Carter" <jerry@...ba.org>
To: bugtraq@...urityfocus.com
Cc: security@...ba.org
Subject: [SAMBA-SECURITY] CVE-2007-0453: Buffer overrun in nss_winbind.so.1
 on Solaris

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

==========================================================
==
== Subject:     Buffer overrun in NSS host lookup Winbind
==		library on Solaris
== CVE ID#:     CVE-2007-0453
==
== Versions:    Samba 3.0.21 - 3.0.23d (inclusive) running on
==		Sun Solaris
==
== Summary:     A potential overrun in the gethostbyname()
==		and getipnodebyname() in the nss_winbind.so.1
==		library on Solaris can potentially allow
==		for code execution.
==
==========================================================

===========
Description
===========

NOTE: This security advisory only affects Sun Solaris
systems running Samba's winbindd daemon and configured to
make use of the nss_winbind.so.1 library for gethostbyname()
and getipnodebyname() name resolution queries.  For example,

	## /etc/nsswitch.conf
	...
	ipnodes: files winbind
	hosts: files winbind

The buffer overrun is caused by copying a string passed
into the NSS interface into a static buffer prior to sending
the request to the winbindd daemon.

==================
Patch Availability
==================

A patch against Samba 3.0.23d has been attached to this
email.  This fix has be incorporated into the Samba 3.0.24
release.  Patches are also available from at the Samba Security
page (http://www.samba.org/samba/security).

==========
Workaround
==========

An unpatched Solaris server may be protected by removing
the 'winbind' entry from the hosts and ipnodes services in
/etc/nsswitch.conf.

=======
Credits
=======

This vulnerability was reported (including a proposed patch)
to Samba developers by Olivier Gay <ouah@...h.org>.   Much thanks
to Olivier for his cooperation and patience in the announcement
of this defect.  The time line is as follows:

* Dec 15, 2006: Defect first reported to the security@...ba.org
  email alias.
* Dec 21, 2006: Initial developer response by Andrew Tridgell
  confirming the issue.
* Jan 29, 2007: Announcement to vendor-sec mailing list
* Feb 5, 2007: Public issue of security advisory.

==========================================================
== Our Code, Our Bugs, Our Responsibility.
== The Samba Team
==========================================================

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.3 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFFxzAOIR7qMdg1EfYRAgUoAKCq+KSsNDdpUnToyFtNoMDckMKLHACfet2h
uQ+KAyjI8jTU6nAZHY3v+vI=
=f1TQ
-----END PGP SIGNATURE-----

View attachment "winbind_nss_solaris.patch.asc" of type "text/plain" (201 bytes)

View attachment "winbind_nss_solaris.patch" of type "text/plain" (1085 bytes)