Sigurnosni nedostaci programskog paketa samba4

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by ncert - 10. travnja 2014.10. travnja 2014.0

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Red Hat Security Advisory

Synopsis: Moderate: samba4 security update
Advisory ID: RHSA-2014:0383-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0383.html
Issue date: 2014-04-09
CVE Names: CVE-2012-6150 CVE-2013-4496 CVE-2013-6442
=====================================================================

1. Summary:

Updated samba4 packages that fix three security issues are now available
for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having Moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) – i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) – x86_64
Red Hat Enterprise Linux Server (v. 6) – i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) – i386, x86_64

3. Description:

Samba is an open-source implementation of the Server Message Block (SMB) or
Common Internet File System (CIFS) protocol, which allows PC-compatible
machines to share files, printers, and other information.

It was found that certain Samba configurations did not enforce the password
lockout mechanism. A remote attacker could use this flaw to perform
password guessing attacks on Samba user accounts. Note: this flaw only
affected Samba when deployed as a Primary Domain Controller.
(CVE-2013-4496)

A flaw was found in Samba’s “smbcacls” command, which is used to set or get
ACLs on SMB file shares. Certain command line options of this command would
incorrectly remove an ACL previously applied on a file or a directory,
leaving the file or directory without the intended ACL. (CVE-2013-6442)

A flaw was found in the way the pam_winbind module handled configurations
that specified a non-existent group as required. An authenticated user
could possibly use this flaw to gain access to a service using pam_winbind
in its PAM configuration when group restriction was intended for access to
the service. (CVE-2012-6150)

Red Hat would like to thank the Samba project for reporting CVE-2013-4496
and CVE-2013-6442, and Sam Richardson for reporting CVE-2012-6150.
Upstream acknowledges Andrew Bartlett as the original reporter of
CVE-2013-4496, and Noel Power as the original reporter of CVE-2013-6442.

All users of Samba are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. After installing this
update, the smb service will be restarted automatically.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the
Red Hat Network to apply this update are available at
https://access.redhat.com/site/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1036897 – CVE-2012-6150 samba: pam_winbind fails open when non-existent group specified to require_membership_of
1044099 – CVE-2013-6442 samba: smbcacls will delete ACL lists in certain circumstances
1072792 – CVE-2013-4496 samba: Password lockout not enforced for SAMR password changes

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/samba4-4.0.0-61.el6_5.rc4.src.rpm

i386:
samba4-4.0.0-61.el6_5.rc4.i686.rpm
samba4-client-4.0.0-61.el6_5.rc4.i686.rpm
samba4-common-4.0.0-61.el6_5.rc4.i686.rpm
samba4-dc-4.0.0-61.el6_5.rc4.i686.rpm
samba4-dc-libs-4.0.0-61.el6_5.rc4.i686.rpm
samba4-debuginfo-4.0.0-61.el6_5.rc4.i686.rpm
samba4-devel-4.0.0-61.el6_5.rc4.i686.rpm
samba4-libs-4.0.0-61.el6_5.rc4.i686.rpm
samba4-pidl-4.0.0-61.el6_5.rc4.i686.rpm
samba4-python-4.0.0-61.el6_5.rc4.i686.rpm
samba4-swat-4.0.0-61.el6_5.rc4.i686.rpm
samba4-test-4.0.0-61.el6_5.rc4.i686.rpm
samba4-winbind-4.0.0-61.el6_5.rc4.i686.rpm
samba4-winbind-clients-4.0.0-61.el6_5.rc4.i686.rpm
samba4-winbind-krb5-locator-4.0.0-61.el6_5.rc4.i686.rpm

x86_64:
samba4-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-client-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-common-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-dc-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-dc-libs-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-debuginfo-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-devel-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-libs-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-pidl-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-python-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-swat-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-test-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-winbind-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-winbind-clients-4.0.0-61.el6_5.rc4.x86_64.rpm
samba4-winbind-krb5-locator-4.0.0-61.el6_5.rc4.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/samba4-4.0.0-61.el6_5.rc4.src.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/samba4-4.0.0-61.el6_5.rc4.src.rpm

ppc64:
samba4-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-client-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-common-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-dc-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-dc-libs-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-debuginfo-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-devel-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-libs-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-pidl-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-python-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-swat-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-test-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-winbind-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-winbind-clients-4.0.0-61.el6_5.rc4.ppc64.rpm
samba4-winbind-krb5-locator-4.0.0-61.el6_5.rc4.ppc64.rpm

s390x:
samba4-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-client-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-common-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-dc-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-dc-libs-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-debuginfo-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-devel-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-libs-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-pidl-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-python-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-swat-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-test-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-winbind-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-winbind-clients-4.0.0-61.el6_5.rc4.s390x.rpm
samba4-winbind-krb5-locator-4.0.0-61.el6_5.rc4.s390x.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/samba4-4.0.0-61.el6_5.rc4.src.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2012-6150.html
https://www.redhat.com/security/data/cve/CVE-2013-4496.html
https://www.redhat.com/security/data/cve/CVE-2013-6442.html
https://access.redhat.com/security/updates/classification/#moderate
https://www.samba.org/samba/security/CVE-2012-6150
https://www.samba.org/samba/security/CVE-2013-4496
https://www.samba.org/samba/security/CVE-2013-6442

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

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