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RHEL 7.7: RHSA-2022:0664 Critical: Samba Code Execution Risk

red hat
Calendar Grey February 23, 2022
Dist Redhat Esm H88
Urgent samba security patch issued for Red Hat Enterprise Linux. Be sure to implement the required updates without delay.
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 Li...

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: Out-of-bounds heap read/write vulnerability in VFS module vfs_fruit allows code execution (CVE-2021-44142)
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.

Topics%20covered

Topics Covered

security advisory critical code execution samba Red Hat Enterprise Linux heap overflow service restart

References

https://access.redhat.com/security/cve/CVE-2021-44142 https://access.redhat.com/security/updates/classification/#critical

Package List

Red Hat Enterprise Linux Server AUS (v. 7.7):
Source: samba-4.9.1-12.el7_7.src.rpm
noarch: samba-common-4.9.1-12.el7_7.noarch.rpm
x86_64: libsmbclient-4.9.1-12.el7_7.i686.rpm libsmbclient-4.9.1-12.el7_7.x86_64.rpm libwbclient-4.9.1-12.el7_7.i686.rpm libwbclient-4.9.1-12.el7_7.x86_64.rpm samba-4.9.1-12.el7_7.x86_64.rpm samba-client-4.9.1-12.el7_7.x86_64.rpm samba-client-libs-4.9.1-12.el7_7.i686.rpm samba-client-libs-4.9.1-12.el7_7.x86_64.rpm samba-common-libs-4.9.1-12.el7_7.x86_64.rpm samba-common-tools-4.9.1-12.el7_7.x86_64.rpm samba-debuginfo-4.9.1-12.el7_7.i686.rpm samba-debuginfo-4.9.1-12.el7_7.x86_64.rpm samba-krb5-printing-4.9.1-12.el7_7.x86_64.rpm samba-libs-4.9.1-12.el7_7.i686.rpm samba-libs-4.9.1-12.el7_7.x86_64.rpm samba-python-4.9.1-12.el7_7.i686.rpm samba-python-4.9.1-12.el7_7.x86_64.rpm samba-winbind-4.9.1-12.el7_7.x86_64.rpm samba-winbind-clients-4.9.1-12.el7_7.x86_64.rpm samba-winbind-modules-4.9.1-12.el7_7.i686.rpm samba-winbind-modules-4.9.1-12.el7_7.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.7):
Source: samba-4.9.1-12.el7_7.src.rpm
noarch: samba-common-4.9.1-12.el7_7.noarch.rpm
ppc64le: libsmbclient-4.9.1-12.el7_7.ppc64le.rpm libwbclient-4.9.1-12.el7_7.ppc64le.rpm samba-4.9.1-12.el7_7.ppc64le.rpm samba-client-4.9.1-12.el7_7.ppc64le.rpm

Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:0664-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:0664
Issue date: 2022-02-23

Topic

An update for samba is now available for Red Hat Enterprise Linux 7.7Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.7 Update Services for SAPSolutions.Red Hat Product Security has rated this update as having a security impactof Critical. 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 critical code execution samba Red Hat Enterprise Linux heap overflow service restart

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.7) - noarch, x86_64

Red Hat Enterprise Linux Server E4S (v. 7.7) - noarch, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.7) - noarch, x86_64

Red Hat Enterprise Linux Server Optional E4S (v. 7.6) - noarch, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.7) - noarch, x86_64

Red Hat Enterprise Linux Server TUS (v. 7.7) - noarch, x86_64

Bugs Fixed

2046146 - CVE-2021-44142 samba: Out-of-bounds heap read/write vulnerability in VFS module vfs_fruit allows code execution

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