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RedHat: RHSA-2021-5192:04 Important Samba Update Addressing Security Issues

red hat
Calendar Grey December 16, 2021
Dist Redhat Esm H88
Red Hat releases enhancements to Samba, implementing crucial patches, tackling significant security vulnerabilities while boosting its operational performance. Get your update today!
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: Active Directory (AD) domain user could become root on domain members (CVE-2020-25717)
* samba: SMB1 client connections can be downgraded to plaintext authentication (CVE-2016-2124)
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):
* Backport IDL changes to harden Kerberos communication (BZ#2021428)

Topics%20covered

Topics Covered

security advisory security issue bug fix samba important security impact red hat enterprise

References

https://access.redhat.com/security/cve/CVE-2016-2124 https://access.redhat.com/security/cve/CVE-2020-25717 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: samba-4.10.16-17.el7_9.src.rpm
noarch: samba-common-4.10.16-17.el7_9.noarch.rpm
x86_64: libsmbclient-4.10.16-17.el7_9.i686.rpm libsmbclient-4.10.16-17.el7_9.x86_64.rpm libwbclient-4.10.16-17.el7_9.i686.rpm libwbclient-4.10.16-17.el7_9.x86_64.rpm samba-client-4.10.16-17.el7_9.x86_64.rpm samba-client-libs-4.10.16-17.el7_9.i686.rpm samba-client-libs-4.10.16-17.el7_9.x86_64.rpm samba-common-libs-4.10.16-17.el7_9.i686.rpm samba-common-libs-4.10.16-17.el7_9.x86_64.rpm samba-common-tools-4.10.16-17.el7_9.x86_64.rpm samba-debuginfo-4.10.16-17.el7_9.i686.rpm samba-debuginfo-4.10.16-17.el7_9.x86_64.rpm samba-krb5-printing-4.10.16-17.el7_9.x86_64.rpm samba-libs-4.10.16-17.el7_9.i686.rpm samba-libs-4.10.16-17.el7_9.x86_64.rpm samba-winbind-4.10.16-17.el7_9.x86_64.rpm samba-winbind-clients-4.10.16-17.el7_9.x86_64.rpm samba-winbind-modules-4.10.16-17.el7_9.i686.rpm samba-winbind-modules-4.10.16-17.el7_9.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch: samba-pidl-4.10.16-17.el7_9.noarch.rpm
x86_64: libsmbclient-devel-4.10.16-17.el7_9.i686.rpm libsmbclient-devel-4.10.16-17.el7_9.x86_64.rpm libwbclient-devel-4.10.16-17.el7_9.i686.rpm libwbclient-devel-4.10.16-17.el7_9.x86_64.rpm samba-4.10.16-17.el7_9.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:5192-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:5192
Issue date: 2021-12-16

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 Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue bug fix samba important security impact red hat enterprise

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

2019660 - CVE-2016-2124 samba: SMB1 client connections can be downgraded to plaintext authentication

2019672 - CVE-2020-25717 samba: Active Directory (AD) domain user could become root on domain members

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