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RedHat 8.4 RHSA-2022-0331-02 Critical: Samba Code Execution Threat

red hat
Calendar Grey January 31, 2022
Dist Redhat Esm H88
Red Hat issues vital samba security patch for RHEL 8.4 addressing out-of-bounds weakness and enhancing performance.
An update for samba is now available for Red Hat Enterprise Linux 8.4 Extended Update Support

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.
Bug Fix(es):
* Fix username map script regression introduced with CVE-2020-25717 (BZ#2046173)

Topics%20covered

Topics Covered

security advisory Red Hat critical code execution bug fix samba CIFS

References

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

Package List

Red Hat Enterprise Linux BaseOS EUS (v.8.4):
Source: samba-4.13.3-9.el8_4.src.rpm
aarch64: ctdb-4.13.3-9.el8_4.aarch64.rpm ctdb-debuginfo-4.13.3-9.el8_4.aarch64.rpm ctdb-tests-4.13.3-9.el8_4.aarch64.rpm ctdb-tests-debuginfo-4.13.3-9.el8_4.aarch64.rpm libsmbclient-4.13.3-9.el8_4.aarch64.rpm libsmbclient-debuginfo-4.13.3-9.el8_4.aarch64.rpm libwbclient-4.13.3-9.el8_4.aarch64.rpm libwbclient-debuginfo-4.13.3-9.el8_4.aarch64.rpm python3-samba-4.13.3-9.el8_4.aarch64.rpm python3-samba-debuginfo-4.13.3-9.el8_4.aarch64.rpm python3-samba-test-4.13.3-9.el8_4.aarch64.rpm samba-4.13.3-9.el8_4.aarch64.rpm samba-client-4.13.3-9.el8_4.aarch64.rpm samba-client-debuginfo-4.13.3-9.el8_4.aarch64.rpm samba-client-libs-4.13.3-9.el8_4.aarch64.rpm samba-client-libs-debuginfo-4.13.3-9.el8_4.aarch64.rpm samba-common-libs-4.13.3-9.el8_4.aarch64.rpm samba-common-libs-debuginfo-4.13.3-9.el8_4.aarch64.rpm samba-common-tools-4.13.3-9.el8_4.aarch64.rpm samba-common-tools-debuginfo-4.13.3-9.el8_4.aarch64.rpm samba-debuginfo-4.13.3-9.el8_4.aarch64.rpm samba-debugsource-4.13.3-9.el8_4.aarch64.rpm samba-krb5-printing-4.13.3-9.el8_4.aarch64.rpm samba-krb5-printing-debuginfo-4.13.3-9.el8_4.aarch64.rpm samba-libs-4.13.3-9.el8_4.aarch64.rpm samba-libs-debuginfo-4.13.3-9.el8_4.aarch64.rpm

Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:0331-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:0331
Issue date: 2022-01-31

Topic

An update for samba is now available for Red Hat Enterprise Linux 8.4Extended Update Support.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 Red Hat critical code execution bug fix samba CIFS

Relevant Releases Architectures

Red Hat CodeReady Linux Builder EUS (v. 8.4) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux BaseOS EUS (v.8.4) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

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

2046173 - Failed to authenticate users after upgrade samba package to release samba-4.14.5-7x [rhel-8.4.0.z]

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