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Red Hat Enterprise Linux 7 RHSA-2021-2313 Moderate Samba Security Fix

red hat
Calendar Grey June 8, 2021
Dist Redhat Esm H88
An update for Samba on Red Hat Enterprise Linux has been released, addressing moderate severity vulnerabilities and important bug fixes to enhance security and stability
An update for samba is now available for Red Hat Enterprise Linux 7

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.

Summary

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.
Bug Fix(es):
* smb.service stops when samba rpms are updated (BZ#1930747)
* samba printing dumps core (BZ#1937867)

Topics%20covered

Topics Covered

security advisory bug fix samba security fix Red Hat Enterprise Linux moderate impact networking

References

https://access.redhat.com/security/cve/CVE-2021-20254 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: samba-4.10.16-15.el7_9.src.rpm
noarch: samba-common-4.10.16-15.el7_9.noarch.rpm
x86_64: libsmbclient-4.10.16-15.el7_9.i686.rpm libsmbclient-4.10.16-15.el7_9.x86_64.rpm libwbclient-4.10.16-15.el7_9.i686.rpm libwbclient-4.10.16-15.el7_9.x86_64.rpm samba-client-4.10.16-15.el7_9.x86_64.rpm samba-client-libs-4.10.16-15.el7_9.i686.rpm samba-client-libs-4.10.16-15.el7_9.x86_64.rpm samba-common-libs-4.10.16-15.el7_9.i686.rpm samba-common-libs-4.10.16-15.el7_9.x86_64.rpm samba-common-tools-4.10.16-15.el7_9.x86_64.rpm samba-debuginfo-4.10.16-15.el7_9.i686.rpm samba-debuginfo-4.10.16-15.el7_9.x86_64.rpm samba-krb5-printing-4.10.16-15.el7_9.x86_64.rpm samba-libs-4.10.16-15.el7_9.i686.rpm samba-libs-4.10.16-15.el7_9.x86_64.rpm samba-winbind-4.10.16-15.el7_9.x86_64.rpm samba-winbind-clients-4.10.16-15.el7_9.x86_64.rpm samba-winbind-modules-4.10.16-15.el7_9.i686.rpm samba-winbind-modules-4.10.16-15.el7_9.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch: samba-pidl-4.10.16-15.el7_9.noarch.rpm
x86_64: libsmbclient-devel-4.10.16-15.el7_9.i686.rpm libsmbclient-devel-4.10.16-15.el7_9.x86_64.rpm libwbclient-devel-4.10.16-15.el7_9.i686.rpm libwbclient-devel-4.10.16-15.el7_9.x86_64.rpm samba-4.10.16-15.el7_9.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:2313-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2313
Issue date: 2021-06-08

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 impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory bug fix samba security fix Red Hat Enterprise Linux moderate impact networking

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Resilient Storage (v. 7) - ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64

Bugs Fixed

1930747 - [RHEL7.9] smb.service stops when samba rpms are updated

1937867 - samba printing dumps core

1949442 - CVE-2021-20254 samba: Negative idmap cache entries can cause incorrect group entries in the Samba file server process token

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