RHSA-2020:5439 — Security Advisory

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.

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)