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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: samba security update
Advisory ID:       RHSA-2021:4843-01
Product:           Red Hat Gluster Storage
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:4843
Issue date:        2021-11-29
CVE Names:         CVE-2016-2124 CVE-2020-25717 CVE-2021-23192 
=====================================================================

1. Summary:

An update for samba is now available for Red Hat Gluster Storage 3.5 for
Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Gluster 3.5 Samba on RHEL-8 - noarch, x86_64

3. Description:

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

Security Fix(es):

* samba: SMB1 client connections can be downgraded to plaintext
authentication (CVE-2016-2124)

* samba: Subsequent DCE/RPC fragment injection vulnerability
(CVE-2021-23192)

* samba: A user in an AD Domain could become root on domain members
(CVE-2020-25717)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

All users of Samba with Red Hat Gluster Storage are advised to upgrade to
these updated packages.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, the smb service will be restarted
automatically.

For details on migrating Samba/CTDB configuration files, refer to: 

https://access.redhat.com/solutions/4311261

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

2019660 - CVE-2016-2124 samba: SMB1 client connections can be downgraded to plaintext authentication
2019666 - CVE-2021-23192 samba: Subsequent DCE/RPC fragment injection vulnerability
2019672 - CVE-2020-25717 samba: A user in an AD Domain could become root on domain members

6. Package List:

Red Hat Gluster 3.5 Samba on RHEL-8:

Source:
samba-4.14.5-204.el8rhgs.src.rpm

noarch:
samba-common-4.14.5-204.el8rhgs.noarch.rpm
samba-pidl-4.14.5-204.el8rhgs.noarch.rpm

x86_64:
ctdb-4.14.5-204.el8rhgs.x86_64.rpm
ctdb-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
libsmbclient-4.14.5-204.el8rhgs.x86_64.rpm
libsmbclient-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
libsmbclient-devel-4.14.5-204.el8rhgs.x86_64.rpm
libwbclient-4.14.5-204.el8rhgs.x86_64.rpm
libwbclient-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
libwbclient-devel-4.14.5-204.el8rhgs.x86_64.rpm
python3-samba-4.14.5-204.el8rhgs.x86_64.rpm
python3-samba-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-4.14.5-204.el8rhgs.x86_64.rpm
samba-client-4.14.5-204.el8rhgs.x86_64.rpm
samba-client-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-client-libs-4.14.5-204.el8rhgs.x86_64.rpm
samba-client-libs-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-common-libs-4.14.5-204.el8rhgs.x86_64.rpm
samba-common-libs-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-common-tools-4.14.5-204.el8rhgs.x86_64.rpm
samba-common-tools-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-debugsource-4.14.5-204.el8rhgs.x86_64.rpm
samba-devel-4.14.5-204.el8rhgs.x86_64.rpm
samba-krb5-printing-4.14.5-204.el8rhgs.x86_64.rpm
samba-krb5-printing-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-libs-4.14.5-204.el8rhgs.x86_64.rpm
samba-libs-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-test-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-test-libs-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-vfs-glusterfs-4.14.5-204.el8rhgs.x86_64.rpm
samba-vfs-glusterfs-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-vfs-iouring-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-winbind-4.14.5-204.el8rhgs.x86_64.rpm
samba-winbind-clients-4.14.5-204.el8rhgs.x86_64.rpm
samba-winbind-clients-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-winbind-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-winbind-krb5-locator-4.14.5-204.el8rhgs.x86_64.rpm
samba-winbind-krb5-locator-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-winbind-modules-4.14.5-204.el8rhgs.x86_64.rpm
samba-winbind-modules-debuginfo-4.14.5-204.el8rhgs.x86_64.rpm
samba-winexe-debuginfo-4.14.5-204.el8rhgs.x86_64.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/

7. References:

https://access.redhat.com/security/cve/CVE-2016-2124
https://access.redhat.com/security/cve/CVE-2020-25717
https://access.redhat.com/security/cve/CVE-2021-23192
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2021 Red Hat, Inc.
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