RHSA-2020:3981 - Security Advisory

Topic

An update for samba is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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.

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.

The following packages have been upgraded to a later upstream version: samba (4.10.16). (BZ#1785121)

Security Fix(es):

• samba: Crash after failed character conversion at log level 3 or above (CVE-2019-14907)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes linked from the References section.

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.

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux Resilient Storage for x86_64 7 x86_64
• Red Hat Enterprise Linux Resilient Storage for IBM z Systems 7 s390x
• Red Hat Enterprise Linux Resilient Storage for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le
• Red Hat Enterprise Linux Resilient Storage for IBM Power, little endian - Extended Life Cycle Support 7 ppc64le

Fixes

• BZ - 1737888 - Libwbclient alternatives manual setting lost
• BZ - 1776333 - CLI tools printing "Unable to initialize messaging context" running as non root
• BZ - 1785121 - Rebase Samba to the the latest 4.10.x maintenance release
• BZ - 1791207 - CVE-2019-14907 samba: Crash after failed character conversion at log level 3 or above
• BZ - 1791823 - wbinfo -K doesn't work for users of trusted domains/forests
• BZ - 1801496 - Missing directories in ctdb package
• BZ - 1813017 - Can't get 'log events generated from smbclient'
• BZ - 1828354 - After adding "additional dns hostname" to smb.conf it does not generate /etc/krb5.keytab with the proper SPN.
• BZ - 1828924 - Fix 'require_membership_of' documentation in pam_winbind manpages
• BZ - 1831986 - unprivileged user should be able to read-only to gencache.tdb instead of permission denied
• BZ - 1836427 - net ads join use of netbios+realm breaks GSSAPI authentication

CVEs

• CVE-2019-14907

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.9_release_notes/index