RHBA-2015:1383 - Bug Fix Advisory

Topic

Updated samba packages that fix several bugs are now available for Red Hat
Enterprise Linux 6.

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 other information.

This update fixes the following bugs:

• Enumerating groups did not work as expected with ID mapping for Winbind

configured. Running the "getent group -s winbind" command displayed no output if
Winbind could not retrieve a GID from a group in Active Directory (AD). With
this update, "getent group -s winbind" correctly lists the groups in the
described situation. (BZ#1117059)

• Previously, Samba could be consuming a lot of CPU resources every 60 seconds.

The mechanism for how the smbd service processes reread the printcap
configuration has been modified, and Samba no longer causes these periodical
increases in CPU consumption. (BZ#1138552)

• An attempt to use the smbclient utility to access a CIFS share could fail

under certain circumstances, and the smbd service logged the attempt as
LOGON_FAILURE even when the user provided the correct password. The problem has
been fixed, and accessing a CIFS share using smbclient works as expected.
(BZ#1144916)

• Running the "net ads join -k" command could result in a segmentation fault

when the /etc/krb5.keytab file contained an existing keytab entry. This update
prevents passing an invalid pointer, which caused the segmentation fault, and
"net ads join -k" no longer fails in the described situation. (BZ#1163383)

• Description for the "access based share enum" option has been added to the

sharesec(1) man page. (BZ#1164336)

• After the Samba packages upgrade, accessing a printer could fail with error

messages. The user could not connect to a printer or print files. When more than
900 printers were registered, the rpcclient utility failed with an error
message. A patch has been applied to fix these problems, and printers can be
used as expected after upgrading Samba. (BZ#1164269, BZ#1165750)

• Creating a snapshot from a Windows 2008 or Windows 7 client on a share using

the shadow_copy2 module could fail when the snapshot was restoring a file that
did not yet exist in the directory. The "NT_STATUS_OBJECT_NAME_NOT_FOUND"
message appeared after the user clicked the restore button. With this update,
restoring a snapshot works as expected in the described situation. (BZ#1192211)

• When two AD domains, each configured in a separate forest, had a two-way trust

established, Winbind retrieved incorrect group information after the user logged
in. For example, the "id" utility did not display the correct list of groups the
user belonged to. Only the supplementary groups from the user's own domain were
listed when the user was a member of groups from both domains. With this update,
Samba clears the cache after a successful login to ensure the correct user
information is used. Running "id" now lists supplementary groups from both
trusted domains in the described situation. (BZ#1194549)

• Samba did not start when the file system was in read-only mode. With this

update, the Samba init scripts no longer require write permissions for certain
system files. Samba now runs as expected on read-only systems. (BZ#1195456)

• When the "winbind use default domain = yes" setting was used in combination

with the "force user = AD_user_name" setting in the /etc/samba/smb.conf file,
the AD domain user specified in the "force user" attribute could not access the
share. With this update, setting "winbind use default domain = yes" no longer
prevents the AD domain user from accessing the share in the described situation.
(BZ#1201611)

Users of samba are advised to upgrade to these updated packages, which fix these
bugs. After installing this update, the smb service will be restarted
automatically.

Solution

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

For details on how to apply this update, refer to:

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

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x

Fixes

• BZ - 1195456 - Init scripts don't work for read only file systems

CVEs

(none)

References

(none)