RHSA-2021:1647: Red Hat Security Advisory: samba security, bug fix, and enhancement update

An update for samba is now available for Red Hat Enterprise Linux 8. 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.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 (4.13.3). (BZ#1878109) 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. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes linked from the References section. Related CVEs:
• CVE-2020-1472: samba: Netlogon elevation of privilege vulnerability (Zerologon)
• CVE-2020-14318: samba: Missing handle permissions check in SMB1/2/3 ChangeNotify
• CVE-2020-14323: samba: Unprivileged user can crash winbind