Scientific Linux Security Update : samba and cifs-utils on SL6.x i386/x86_64

This script is Copyright (C) 2012-2014 Tenable Network Security, Inc.


Synopsis :

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

Description :

Samba is a suite of programs used by machines to share files,
printers, and other information. The cifs-utils package contains
utilities for mounting and managing CIFS (Common Internet File System)
shares.

A cross-site scripting (XSS) flaw was found in the password change
page of the Samba Web Administration Tool (SWAT). If a remote attacker
could trick a user, who was logged into the SWAT interface, into
visiting a specially crafted URL, it would lead to arbitrary web
script execution in the context of the user's SWAT session.
(CVE-2011-2694)

It was found that SWAT web pages did not protect against Cross-Site
Request Forgery (CSRF) attacks. If a remote attacker could trick a
user, who was logged into the SWAT interface, into visiting a
specially crafted URL, the attacker could perform Samba configuration
changes with the privileges of the logged in user. (CVE-2011-2522)

It was found that the fix for CVE-2010-0547, provided in the
cifs-utils package included in the GA release of Scientific Linux 6,
was incomplete. The mount.cifs tool did not properly handle share or
directory names containing a newline character, allowing a local
attacker to corrupt the mtab (mounted file systems table) file via a
specially crafted CIFS share mount request, if mount.cifs had the
setuid bit set. (CVE-2011-2724)

It was found that the mount.cifs tool did not handle certain errors
correctly when updating the mtab file. If mount.cifs had the setuid
bit set, a local attacker could corrupt the mtab file by setting a
small file size limit before running mount.cifs. (CVE-2011-1678)

Note: mount.cifs from the cifs-utils package distributed by Scientific
Linux does not have the setuid bit set. We recommend that
administrators do not manually set the setuid bit for mount.cifs.

This update also fixes the following bug :

- If plain text passwords were used ('encrypt passwords =
no' in '/etc/samba/smb.conf'), Samba clients running the
Windows XP or Windows Server 2003 operating system may
not have been able to access Samba shares after
installing the Microsoft Security Bulletin MS11-043.
This update corrects this issue, allowing such clients
to use plain text passwords to access Samba shares.

Users of samba and cifs-utils are advised to upgrade to these updated
packages, which contain backported patches to resolve these issues.
After installing this update, the smb service will be restarted
automatically.

See also :

http://www.nessus.org/u?fe1a06e2

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 6.8
(CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 61122 ()

Bugtraq ID:

CVE ID: CVE-2011-1678
CVE-2011-2522
CVE-2011-2694
CVE-2011-2724