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Red Hat 8 RHSA-2021-1647-01 Moderate Samba Security Update

red hat
Calendar Grey May 18, 2021
Dist Redhat Esm H88
The latest Samba upgrade for Red Hat Enterprise Linux 8 addresses significant security vulnerabilities along with enhancements.
An update for samba is now available for Red Hat Enterprise Linux 8

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.
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.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix samba Red Hat Enterprise Linux moderate severity moderate impact impact assessment elevation of privilege SMB protocol Samba update

References

https://access.redhat.com/security/cve/CVE-2020-1472 https://access.redhat.com/security/cve/CVE-2020-14318 https://access.redhat.com/security/cve/CVE-2020-14323 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/articles/5435971 https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: openchange-2.3-27.el8.src.rpm
aarch64: openchange-2.3-27.el8.aarch64.rpm openchange-client-debuginfo-2.3-27.el8.aarch64.rpm openchange-debuginfo-2.3-27.el8.aarch64.rpm openchange-debugsource-2.3-27.el8.aarch64.rpm
ppc64le: openchange-2.3-27.el8.ppc64le.rpm openchange-client-debuginfo-2.3-27.el8.ppc64le.rpm openchange-debuginfo-2.3-27.el8.ppc64le.rpm openchange-debugsource-2.3-27.el8.ppc64le.rpm
s390x: openchange-2.3-27.el8.s390x.rpm openchange-client-debuginfo-2.3-27.el8.s390x.rpm openchange-debuginfo-2.3-27.el8.s390x.rpm openchange-debugsource-2.3-27.el8.s390x.rpm
x86_64: openchange-2.3-27.el8.i686.rpm openchange-2.3-27.el8.x86_64.rpm openchange-client-debuginfo-2.3-27.el8.i686.rpm openchange-client-debuginfo-2.3-27.el8.x86_64.rpm openchange-debuginfo-2.3-27.el8.i686.rpm openchange-debuginfo-2.3-27.el8.x86_64.rpm openchange-debugsource-2.3-27.el8.i686.rpm openchange-debugsource-2.3-27.el8.x86_64.rpm
Red Hat Enterprise Linux BaseOS (v. 8):
Source: samba-4.13.3-3.el8.src.rpm
aarch64: ctdb-4.13.3-3.el8.aarch64.rpm ctdb-debuginfo-4.13.3-3.el8.aarch64.rpm ctdb-tests-4.13.3-3.el8.aarch64.rpm ctdb-tests-debuginfo-4.13.3-3.el8.aarch64.rpm libsmbclient-4.13.3-3.el8.aarch64.rpm libsmbclient-debuginfo-4.13.3-3.el8.aarch64.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:1647-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1647
Issue date: 2021-05-18

Topic

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 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 Red Hat bug fix samba Red Hat Enterprise Linux moderate severity moderate impact impact assessment elevation of privilege SMB protocol Samba update

Relevant Releases Architectures

Red Hat CodeReady Linux Builder (v. 8) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

1818038 - Improve FIPS compliance in Samba

1869702 - Malfunctioning %U substitution in valid users option

1872833 - RFE: Build winexe and offer it as a subpackage

1878109 - Rebase Samba to the the latest 4.13.x release

1879822 - CVE-2020-1472 samba: Netlogon elevation of privilege vulnerability (Zerologon)

1888990 - Update smb.conf man pages to include information about restarting smbd to implement changes

1891685 - CVE-2020-14323 samba: Unprivileged user can crash winbind

1892631 - CVE-2020-14318 samba: Missing handle permissions check in SMB1/2/3 ChangeNotify

1896736 - Make sure Samba is able to resolve FreeIPA users specified in different name formats

1898866 - Rebuild openchange against Samba rebase

1902198 - Document 'weak crypto' output of testparm in manpage

1904174 - 'net ads join' fails with "Failed to join domain: failed to connect to AD: Operations error"

1924571 - smb.service stops when samba rpms are updated

1924615 - smbd share mode double free crash - memcache_trim bug

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