QID 239322

Date Published: 2021-05-20

QID 239322: Red Hat Update for samba (RHSA-2021:1647)

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)

Affected Products:

Red Hat Enterprise Linux for IBM z Systems 8 s390x
Red Hat Enterprise Linux for Power, little endian 8 ppc64le
Red Hat Virtualization Host 4 for RHEL 8 x86_64
Red Hat Enterprise Linux for x86_64 8 x86_64
Red Hat Enterprise Linux for ARM 64 8 aarch64
Red Hat CodeReady Linux Builder for x86_64 8 x86_64
Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le
Red Hat CodeReady Linux Builder for ARM 64 8 aarch64
Red Hat CodeReady Linux Builder for IBM z Systems 8 s390x

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

On successful exploitation, it could allow an attacker to execute code.

  • CVSS V3 rated as Critical - 10 severity.
  • CVSS V2 rated as Critical - 9.3 severity.
    • Solution
    Upgrade to the latest packages which contain a patch. Refer to Applying Package Updates to RHEL system for details.

    Refer to Red Hat security advisory RHSA-2021:1647 to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239322

    CVE-2020-1472 | CVE-2020-14318 | CVE-2020-14323 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:1647 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:1647?language=en
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