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Red Hat Enterprise Linux 7 RHSA-2020:5439-01 Moderate Samba Security Fix

red hat
Calendar Grey December 15, 2020
Dist Redhat Esm H88
Keep informed about the most recent samba vulnerabilities and patches for CentOS with this comprehensive notification.
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: 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)

Topics%20covered

Topics Covered

security advisory moderate Red Hat bug fix samba memory leak red hat enterprise Moderate Bug Fix elevation of privilege Privileged Elevation

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

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: samba-4.10.16-9.el7_9.src.rpm
noarch: samba-common-4.10.16-9.el7_9.noarch.rpm
x86_64: libsmbclient-4.10.16-9.el7_9.i686.rpm libsmbclient-4.10.16-9.el7_9.x86_64.rpm libwbclient-4.10.16-9.el7_9.i686.rpm libwbclient-4.10.16-9.el7_9.x86_64.rpm samba-client-4.10.16-9.el7_9.x86_64.rpm samba-client-libs-4.10.16-9.el7_9.i686.rpm samba-client-libs-4.10.16-9.el7_9.x86_64.rpm samba-common-libs-4.10.16-9.el7_9.i686.rpm samba-common-libs-4.10.16-9.el7_9.x86_64.rpm samba-common-tools-4.10.16-9.el7_9.x86_64.rpm samba-debuginfo-4.10.16-9.el7_9.i686.rpm samba-debuginfo-4.10.16-9.el7_9.x86_64.rpm samba-krb5-printing-4.10.16-9.el7_9.x86_64.rpm samba-libs-4.10.16-9.el7_9.i686.rpm samba-libs-4.10.16-9.el7_9.x86_64.rpm samba-winbind-4.10.16-9.el7_9.x86_64.rpm samba-winbind-clients-4.10.16-9.el7_9.x86_64.rpm samba-winbind-modules-4.10.16-9.el7_9.i686.rpm samba-winbind-modules-4.10.16-9.el7_9.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch: samba-pidl-4.10.16-9.el7_9.noarch.rpm
x86_64: libsmbclient-devel-4.10.16-9.el7_9.i686.rpm libsmbclient-devel-4.10.16-9.el7_9.x86_64.rpm libwbclient-devel-4.10.16-9.el7_9.i686.rpm libwbclient-devel-4.10.16-9.el7_9.x86_64.rpm samba-4.10.16-9.el7_9.x86_64.rpm samba-dc-4.10.16-9.el7_9.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2020:5439-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:5439
Issue date: 2020-12-15

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 moderate Red Hat bug fix samba memory leak red hat enterprise Moderate Bug Fix elevation of privilege Privileged Elevation

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

1853272 - The 'require_membership_of' documentation in pam_winbind manpage is incorrect [rhel-7.9.z]

1868917 - Malfunctioning %U substitution in valid users option [rhel-7.9.z]

1878205 - Regression: smbd and nmbd are restarted when samba-winbind package is upgraded [rhel-7.9.z]

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

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

1892313 - winbindd memory leak on wbinfo -u with security=ADS [rhel-7.9.z]

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

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