Issued:
2021-10-26
Updated:
2021-10-26

RHSA-2021:3988 - Moderate: samba security update

Synopsis

Moderate: samba security update

Type/Severity

Security Advisory Moderate

Topic

An update for samba is now available for Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended Update Support, and Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions.

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.

Security Fix(es):

  • samba: Negative idmap cache entries can cause incorrect group entries in the Samba file server process token (CVE-2021-20254)

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.

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

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions7.7x86_64
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions7.7ppc64le
Red Hat Enterprise Linux Server - TUS7.7x86_64
Red Hat Enterprise Linux Server - AUS7.7x86_64

Updated Packages

  • samba-4.9.1-11.el7_7.ppc64le.rpm
  • samba-common-tools-4.9.1-11.el7_7.ppc64le.rpm
  • samba-common-tools-4.9.1-11.el7_7.x86_64.rpm
  • samba-client-4.9.1-11.el7_7.ppc64le.rpm
  • samba-devel-4.9.1-11.el7_7.i686.rpm
  • samba-debuginfo-4.9.1-11.el7_7.ppc64le.rpm
  • samba-dc-4.9.1-11.el7_7.ppc64le.rpm
  • samba-common-4.9.1-11.el7_7.noarch.rpm
  • samba-python-4.9.1-11.el7_7.x86_64.rpm
  • samba-winbind-4.9.1-11.el7_7.x86_64.rpm
  • libwbclient-devel-4.9.1-11.el7_7.x86_64.rpm
  • samba-dc-libs-4.9.1-11.el7_7.x86_64.rpm
  • samba-winbind-modules-4.9.1-11.el7_7.x86_64.rpm
  • samba-debuginfo-4.9.1-11.el7_7.x86_64.rpm
  • samba-libs-4.9.1-11.el7_7.ppc64le.rpm
  • samba-test-libs-4.9.1-11.el7_7.i686.rpm
  • libwbclient-devel-4.9.1-11.el7_7.i686.rpm
  • samba-client-libs-4.9.1-11.el7_7.x86_64.rpm
  • samba-krb5-printing-4.9.1-11.el7_7.x86_64.rpm
  • samba-python-4.9.1-11.el7_7.i686.rpm
  • samba-test-libs-4.9.1-11.el7_7.ppc64le.rpm
  • samba-winbind-4.9.1-11.el7_7.ppc64le.rpm
  • libwbclient-devel-4.9.1-11.el7_7.ppc64le.rpm
  • samba-winbind-krb5-locator-4.9.1-11.el7_7.x86_64.rpm
  • libwbclient-4.9.1-11.el7_7.ppc64le.rpm
  • libsmbclient-devel-4.9.1-11.el7_7.ppc64le.rpm
  • samba-python-test-4.9.1-11.el7_7.x86_64.rpm
  • samba-winbind-krb5-locator-4.9.1-11.el7_7.ppc64le.rpm
  • samba-test-libs-4.9.1-11.el7_7.x86_64.rpm
  • samba-client-libs-4.9.1-11.el7_7.i686.rpm
  • samba-vfs-glusterfs-4.9.1-11.el7_7.x86_64.rpm
  • libwbclient-4.9.1-11.el7_7.i686.rpm
  • samba-pidl-4.9.1-11.el7_7.noarch.rpm
  • libsmbclient-4.9.1-11.el7_7.x86_64.rpm
  • libwbclient-4.9.1-11.el7_7.x86_64.rpm
  • samba-krb5-printing-4.9.1-11.el7_7.ppc64le.rpm
  • samba-dc-4.9.1-11.el7_7.x86_64.rpm
  • samba-debuginfo-4.9.1-11.el7_7.i686.rpm
  • samba-winbind-clients-4.9.1-11.el7_7.ppc64le.rpm
  • samba-common-libs-4.9.1-11.el7_7.x86_64.rpm
  • samba-winbind-modules-4.9.1-11.el7_7.i686.rpm
  • samba-4.9.1-11.el7_7.x86_64.rpm
  • samba-devel-4.9.1-11.el7_7.ppc64le.rpm
  • samba-4.9.1-11.el7_7.src.rpm
  • samba-dc-libs-4.9.1-11.el7_7.ppc64le.rpm
  • libsmbclient-devel-4.9.1-11.el7_7.x86_64.rpm
  • samba-python-4.9.1-11.el7_7.ppc64le.rpm
  • libsmbclient-4.9.1-11.el7_7.i686.rpm
  • samba-test-4.9.1-11.el7_7.x86_64.rpm
  • libsmbclient-devel-4.9.1-11.el7_7.i686.rpm
  • samba-winbind-clients-4.9.1-11.el7_7.x86_64.rpm
  • samba-test-4.9.1-11.el7_7.ppc64le.rpm
  • samba-client-4.9.1-11.el7_7.x86_64.rpm
  • samba-libs-4.9.1-11.el7_7.i686.rpm
  • samba-devel-4.9.1-11.el7_7.x86_64.rpm
  • samba-common-libs-4.9.1-11.el7_7.ppc64le.rpm
  • samba-libs-4.9.1-11.el7_7.x86_64.rpm
  • samba-winbind-modules-4.9.1-11.el7_7.ppc64le.rpm
  • samba-client-libs-4.9.1-11.el7_7.ppc64le.rpm
  • libsmbclient-4.9.1-11.el7_7.ppc64le.rpm

Fixes

CVEs

References

Additional information