RHSA-2023:6209MediumCVSS 9.1

Red Hat Security Advisory: samba security update

Published
October 31, 2023
Last Modified
July 27, 2026

🔗 CVE IDs covered (3)

CVE-2023-3961 →CVE-2023-4091 →CVE-2023-42669 →

📋 Description

CVE-2023-3961 — samba: smbd allows client access to unix domain sockets on the file system as root CVE-2023-4091 — samba: SMB clients can truncate files with read-only permissions CVE-2023-42669 — samba: "rpcecho" development server allows denial of service via sleep() call on AD DC

🎯 Affected products200

  • Red Hat CodeReady Linux Builder EUS (v.9.0)
  • Red Hat Enterprise Linux AppStream EUS (v.9.0)
  • Red Hat Enterprise Linux BaseOS EUS (v.9.0)
  • Red Hat Enterprise Linux Resilient Storage EUS (v.9.0)
  • ctdb-0:4.15.5-111.el9_0.ppc64le as a component of Red Hat Enterprise Linux Resilient Storage EUS (v.9.0)
  • ctdb-0:4.15.5-111.el9_0.s390x as a component of Red Hat Enterprise Linux Resilient Storage EUS (v.9.0)
  • ctdb-0:4.15.5-111.el9_0.x86_64 as a component of Red Hat Enterprise Linux Resilient Storage EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.aarch64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.i686 as a component of Red Hat CodeReady Linux Builder EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.i686 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.ppc64le as a component of Red Hat CodeReady Linux Builder EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.ppc64le as a component of Red Hat Enterprise Linux Resilient Storage EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.s390x as a component of Red Hat CodeReady Linux Builder EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.s390x as a component of Red Hat Enterprise Linux Resilient Storage EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.x86_64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.0)
  • ctdb-debuginfo-0:4.15.5-111.el9_0.x86_64 as a component of Red Hat Enterprise Linux Resilient Storage EUS (v.9.0)
  • libsmbclient-0:4.15.5-111.el9_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.0)
  • libsmbclient-0:4.15.5-111.el9_0.i686 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.0)
  • libsmbclient-0:4.15.5-111.el9_0.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.0)
  • libsmbclient-0:4.15.5-111.el9_0.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.0)
  • libsmbclient-0:4.15.5-111.el9_0.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.0)
  • libsmbclient-debuginfo-0:4.15.5-111.el9_0.aarch64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.0)
  • +170 more not shown

✅ Remediation

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. Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: The vulnerability is most commonly associated with the "acl_xattr" module and can be mitigated by setting: ~~~ "acl_xattr:ignore system acls = no" ~~~ Workaround: To mitigate this vulnerability, disable rpcecho service on the AD DC by setting: ~~~ dcerpc endpoint servers = -rpcecho ~~~

🔗 References (6)