Scientific Linux Security Update : samba4 on SL6.x i386/x86_64

This script is Copyright (C) 2013 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

A flaw was found in the Samba suite's Perl-based DCE/RPC IDL (PIDL)
compiler, used to generate code to handle RPC calls. This could result
in code generated by the PIDL compiler to not sufficiently protect
against buffer overflows. (CVE-2012-1182)

The samba4 packages have been upgraded to upstream version 4.0.0,
which provides a number of bug fixes and enhancements over the
previous version. In particular, improved interoperability with Active
Directory (AD) domains. SSSD now uses the libndr-krb5pac library to
parse the Privilege Attribute Certificate (PAC) issued by an AD Key
Distribution Center (KDC).

The Cross Realm Kerberos Trust functionality provided by Identity
Management, which relies on the capabilities of the samba4 client
library, is included as a Technology Preview. This functionality and
server libraries, is included as a Technology Preview. This
functionality uses the libndr-nbt library to prepare Connection-less
Lightweight Directory Access Protocol (CLDAP) messages.

Additionally, various improvements have been made to the Local
Security Authority (LSA) and Net Logon services to allow verification
of trust from a Windows system. Because the Cross Realm Kerberos Trust
functionality is considered a Technology Preview, selected samba4
components are considered to be a Technology Preview. For more
information on which Samba packages are considered a Technology
Preview, refer to Table 5.1, 'Samba4 Package Support' in the Release
Notes, linked to from the References.

This update also fixes the following bug :

- Prior to this update, if the Active Directory (AD)
server was rebooted, Winbind sometimes failed to
reconnect when requested by 'wbinfo -n' or 'wbinfo -s'
commands. Consequently, looking up users using the
wbinfo tool failed. This update applies upstream patches
to fix this problem and now looking up a Security
Identifier (SID) for a username, or a username for a
given SID, works as expected after a domain controller
is rebooted.

Warning: If you upgrade from Scientific Linux 6.3 to Scientific Linux
6.4 and you have Samba in use, you should make sure that you uninstall
the package named 'samba4' to avoid conflicts during the upgrade.

See also :

http://www.nessus.org/u?15585efe

Solution :

Update the affected packages.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
Public Exploit Available : true

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 65015 ()

Bugtraq ID:

CVE ID: CVE-2012-1182