ctdb, libsmbclient, libwbclient, samba security update

CentOS Errata and Security Advisory CESA-2020:5439

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: Netlogon elevation of privilege vulnerability (Zerologon) (CVE-2020-1472)

• samba: Missing handle permissions check in SMB1/2/3 ChangeNotify (CVE-2020-14318)

• samba: Unprivileged user can crash winbind (CVE-2020-14323)

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.

Bug Fix(es):

• The ‘require_membership_of’ documentation in pam_winbind manpage is incorrect (BZ#1853272)

• Malfunctioning %U substitution in valid users option (BZ#1868917)

• Regression: smbd and nmbd are restarted when samba-winbind package is upgraded (BZ#1878205)

• winbindd memory leak on wbinfo -u with security=ADS (BZ#1892313)

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2020-December/086008.html

Affected packages:
ctdb
ctdb-tests
libsmbclient
libsmbclient-devel
libwbclient
libwbclient-devel
samba
samba-client
samba-client-libs
samba-common
samba-common-libs
samba-common-tools
samba-dc
samba-dc-libs
samba-devel
samba-krb5-printing
samba-libs
samba-pidl
samba-python
samba-python-test
samba-test
samba-test-libs
samba-vfs-glusterfs
samba-winbind
samba-winbind-clients
samba-winbind-krb5-locator
samba-winbind-modules

Upstream details at:
https://access.redhat.com/errata/RHSA-2020:5439